Re: Unable to connect IBOutlet in Swift Xcode 7b2
On Mon, Jul 6, 2015, at 07:57 PM, Rick Mann wrote: On Jul 6, 2015, at 17:54 , Charles Srstka cocoa...@charlessoft.com wrote: I’ve occasionally had issues getting Xcode to connect outlets and actions. My workaround for it is to open the Assistant view, and drag from your view into the source file, and let Xcode create an outlet or action automatically. Then you can delete the one it created and it should work with the one you already had. This is what Xcode is refusing to do. As if the class definition wasn't matching the class I specified in the storyboard (but it does; I copied and pasted the name). Is the Module correct? --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Possible to defer initialization of let variable?
I thought I saw some Swift code that did this:
let someString : String?
if some things
{
// some stuff
someString = a string from something
// some other stuff
}
// use someString
But I can't get Swift 2 to let me.
Basically, I want to make someString available outside the scope in which it's
initialized, but I don't want its assignment to ever change after that. I could
do the former with var instead of let, of course, but I'd like it to be treated
as a let after the first assignment. Is that possible?
--
Rick Mann
rm...@latencyzero.com
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Re: Possible to defer initialization of let variable?
On Jul 7, 2015, at 01:08 , Rick Mann rm...@latencyzero.com wrote:
But I can't get Swift 2 to let me.
You’ve left a path through the code that doesn’t set ‘someString’. So, you’ll
need to add:
else
{
someString = nil
}
to the ‘if’.
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Re: cannot invoke 'substringToIndex' with an argument list of type '(Int)'
The docs for NSString say that substringToIndex is declared like that. If you
looked at the autocomplete when you typed it in you’d see it wants an Index,
that’s a method on String. And no it’s not in the documentation but it is in
the API diffs and autocomplete gets it right (for me at least) and Cmd Clicking
takes me there too.
If you want to use an NSString method with the same name as a String one, cast
to an NSString, ( s as NSString )
same with substringFromIndex
and NSURL is a fallible initializer so you can’t return it like that, you
unwrap it, or throw, or test it or something.
Your last mail about NSURLs didn’t make any sense either by the way. You were
using .rawValue() on things typed as Strings, Strings don’t have raw values, so
I think that isn’t really your code.
On 7 Jul 2015, at 15:02, Rick Mann rm...@latencyzero.com wrote:
What? The docs say that substringToIndex is declared like this:
func substringToIndex(_ to: Int) - String
So, why can't I call that here:
extension
NSURL
{
func
normalizedURLByAppendingPathComponent(var inComponent : String)
- NSURL
{
var s = self.absoluteString;
if s.hasSuffix(/)
{
s = s.substringToIndex(s.characters.count - 1)
}
if inComponent.hasPrefix(/)
{
inComponent = inComponent.substringFromIndex(1);
}
s = s.stringByAppendingString(/);
s = s.stringByAppendingString(inComponent);
let u = NSURL(string: s);
return u;
}
}
--
Rick Mann
rm...@latencyzero.com
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Swift enums with raw values
I want to implement some support for HTTP Headers in enums, such that I can
write this:
extension
NSMutableURLRequest
{
func
set(inHeader : String, _ inVal : String)
{
self.setValue(inVal.rawValue, forHTTPHeaderField:
inHeader.rawValue())
}
}
and then call it like this:
req.set(.ContentType, .JSON)
req.set(.ContentType, some other type)
where
enum
HTTPHeader : String
{
case Accept = Accept
case ContentDisposition = Content-Disposition
case ContentLength = Content-Length
case ContentType= Content-Type
case Authorization = Authorization
case Date = Date
case IfModifiedSince= If-Modified-Since
case UserAgent = User-Agent
enum
HTTPContentType : String
{
case JSON = application/json
case JSONUTF8 = application/json;
charset=UTF-8
case OctetStream= application/octet-stream
}
That is, I'd like to not have to explicitly call .rawValue() every time I use
one of the enum cases, and I'd like the Header field name to be one enum, and
the value to be any of a number of different enums. Finally, I'd like to be
able to call set() with one or both parameters of type String, but I think I
can accomplish that with overloading.
Unfortunately, I can't figure out how to make a set of enum types I define
conform to a single type (protocol, class, or abstract enum) such that Swift
doesn't complain.
Any suggestions? Thanks.
--
Rick Mann
rm...@latencyzero.com
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Re: Possible to defer initialization of let variable?
On Jul 7, 2015, at 01:16 , Quincey Morris
quinceymor...@rivergatesoftware.com wrote:
On Jul 7, 2015, at 01:08 , Rick Mann rm...@latencyzero.com wrote:
But I can't get Swift 2 to let me.
You’ve left a path through the code that doesn’t set ‘someString’. So, you’ll
need to add:
else
{
someString = nil
}
to the ‘if’.
Well, I wanted to do this:
// Get the hero thumbnail…
let thumbURL: String?
for imgD in images
{
if let isHero = imgD[is_hero] as? Bool where isHero,
let t = imgD[thumbnail_signed_src] as? String
{
thumbURL = t
break
}
}
print(Thumb: \(thumbURL))
But it complains that it's used before being initialized. I guess I want it to
initialize it to nil, then let me assign it once, then keep it constant.
--
Rick Mann
rm...@latencyzero.com
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Re: Possible to defer initialization of let variable?
On Jul 7, 2015, at 01:37 , Quincey Morris
quinceymor...@rivergatesoftware.com wrote:
On Jul 7, 2015, at 01:33 , Rick Mann rm...@latencyzero.com wrote:
Yeah, there doesn't seem to be an elegant way to do it
Actually, there is:
let thumbURL: String? =
{
for imgD in images
{
if let isHero = imgD[is_hero] as? Bool where isHero,
let t = imgD[thumbnail_signed_src] as? String
{
return t
}
}
return nil
} ()
Or, if you prefer, instead of using a closure, you can define a nested
function and call it to get the initial value.
I tried it as a closure. The problem arises when you want to initialize more
than one variable in that block of work.
--
Rick Mann
rm...@latencyzero.com
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Re: Possible to defer initialization of let variable?
On Jul 7, 2015, at 01:49 , Quincey Morris quinceymor...@rivergatesoftware.com wrote: On Jul 7, 2015, at 01:39 , Rick Mann rm...@latencyzero.com wrote: The problem arises when you want to initialize more than one variable in that block of work. If you ask the wrong question, you get a wrong answer. :) Whether or not it was the wrong question is debatable. You can use a tuple: Unfortunately, that requires you to have the values all ready at once. Thanks for trying, but I think there's no good way to do this. Best is to just deal with var. Or do the hacky thing you suggested earlier, with local vars that get assigned at the very end to their lets. -- Rick Mann rm...@latencyzero.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Possible to defer initialization of let variable?
On Jul 7, 2015, at 01:39 , Rick Mann rm...@latencyzero.com wrote:
The problem arises when you want to initialize more than one variable in that
block of work.
If you ask the wrong question, you get a wrong answer. :)
You can use a tuple:
let (thumbURL, isHero) =
{
() - (String?, Bool) in
for imgD in images
{
if let isHero = imgD[is_hero] as? Bool where isHero,
let t = imgD[thumbnail_signed_src] as? String
{
return (t, isHero)
}
}
return (nil, false)
} ()
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Re: Unable to connect IBOutlet in Swift Xcode 7b2
On Jul 6, 2015, at 23:22 , Kyle Sluder k...@ksluder.com wrote: On Mon, Jul 6, 2015, at 07:57 PM, Rick Mann wrote: On Jul 6, 2015, at 17:54 , Charles Srstka cocoa...@charlessoft.com wrote: I’ve occasionally had issues getting Xcode to connect outlets and actions. My workaround for it is to open the Assistant view, and drag from your view into the source file, and let Xcode create an outlet or action automatically. Then you can delete the one it created and it should work with the one you already had. This is what Xcode is refusing to do. As if the class definition wasn't matching the class I specified in the storyboard (but it does; I copied and pasted the name). Is the Module correct? It's in the same source file as the other view that it does connect to; both module fields are blank in IB -- Rick Mann rm...@latencyzero.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
cannot invoke 'substringToIndex' with an argument list of type '(Int)'
What? The docs say that substringToIndex is declared like this:
func substringToIndex(_ to: Int) - String
So, why can't I call that here:
extension
NSURL
{
func
normalizedURLByAppendingPathComponent(var inComponent : String)
- NSURL
{
var s = self.absoluteString;
if s.hasSuffix(/)
{
s = s.substringToIndex(s.characters.count - 1)
}
if inComponent.hasPrefix(/)
{
inComponent = inComponent.substringFromIndex(1);
}
s = s.stringByAppendingString(/);
s = s.stringByAppendingString(inComponent);
let u = NSURL(string: s);
return u;
}
}
--
Rick Mann
rm...@latencyzero.com
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Re: cannot invoke 'substringToIndex' with an argument list of type '(Int)'
You should file a documentation bug. The signature is actually:
func substringFromIndex(index: String.Index) - String
So what you really want I believe is:
s = s.substringToIndex(advance(s.endIndex, -1))
On Tue, Jul 7, 2015 at 2:02 AM, Rick Mann rm...@latencyzero.com wrote:
What? The docs say that substringToIndex is declared like this:
func substringToIndex(_ to: Int) - String
So, why can't I call that here:
extension
NSURL
{
func
normalizedURLByAppendingPathComponent(var inComponent : String)
- NSURL
{
var s = self.absoluteString;
if s.hasSuffix(/)
{
s = s.substringToIndex(s.characters.count - 1)
}
if inComponent.hasPrefix(/)
{
inComponent = inComponent.substringFromIndex(1);
}
s = s.stringByAppendingString(/);
s = s.stringByAppendingString(inComponent);
let u = NSURL(string: s);
return u;
}
}
--
Rick Mann
rm...@latencyzero.com
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Re: cannot invoke 'substringToIndex' with an argument list of type '(Int)'
On Jul 7, 2015, at 00:22 , Roland King r...@rols.org wrote: If you want to use an NSString method with the same name as a String one, cast to an NSString, ( s as NSString ) The other thing to be really, really careful of when bridging is that all indexes and ranges derived from NSString API are counting by UTF-16 code units**, as they’ve always done. Indexes and ranges derived from String API are counting by graphemes. ** At least, that was the situation in Swift 1.2. I haven’t looked into what’s changed with NSString bridging in Swift 2, but I suspect caution is still advisable. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: cannot invoke 'substringToIndex' with an argument list of type '(Int)'
The bug is really that they haven’t documented the new String method so you
only get the old (and still-existing) NSString method.
I did find it in some documentation which pointed to online documentation (you
can tell by the lag) so I went to prefs, updated my docsets, and now I don’t
have it any more, which is rather par for the course and generally sad.
new Xcode tomorrow (?), perhaps we’ll get a docs update.
On 7 Jul 2015, at 15:25, Stephen J. Butler stephen.but...@gmail.com wrote:
You should file a documentation bug. The signature is actually:
func substringFromIndex(index: String.Index) - String
So what you really want I believe is:
s = s.substringToIndex(advance(s.endIndex, -1))
On Tue, Jul 7, 2015 at 2:02 AM, Rick Mann rm...@latencyzero.com wrote:
What? The docs say that substringToIndex is declared like this:
func substringToIndex(_ to: Int) - String
So, why can't I call that here:
extension
NSURL
{
func
normalizedURLByAppendingPathComponent(var inComponent : String)
- NSURL
{
var s = self.absoluteString;
if s.hasSuffix(/)
{
s = s.substringToIndex(s.characters.count - 1)
}
if inComponent.hasPrefix(/)
{
inComponent = inComponent.substringFromIndex(1);
}
s = s.stringByAppendingString(/);
s = s.stringByAppendingString(inComponent);
let u = NSURL(string: s);
return u;
}
}
--
Rick Mann
rm...@latencyzero.com
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Re: Possible to defer initialization of let variable?
Yeah, there doesn't seem to be an elegant way to do it, so I gave up and used a
var.
On Jul 7, 2015, at 01:31 , Quincey Morris
quinceymor...@rivergatesoftware.com wrote:
On Jul 7, 2015, at 01:21 , Rick Mann rm...@latencyzero.com wrote:
let thumbURL: String?
for imgD in images
{
if let isHero = imgD[is_hero] as? Bool where isHero,
let t = imgD[thumbnail_signed_src] as? String
{
thumbURL = t
break
}
}
You’ve still got a path where ‘thumbURL’ is uninitialized — when ‘images’ is
empty. I’m not sure if there’s an elegant way to do it, but you can do it by
brute force something like this:
do
{
var url: String? = nil
for imgD in images
{
if let isHero = imgD[is_hero] as? Bool where isHero,
let t = imgD[thumbnail_signed_src] as? String
{
url = t
break
}
}
thumbURL = url
}
--
Rick Mann
rm...@latencyzero.com
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Re: Possible to defer initialization of let variable?
On Jul 7, 2015, at 01:33 , Rick Mann rm...@latencyzero.com wrote:
Yeah, there doesn't seem to be an elegant way to do it
Actually, there is:
let thumbURL: String? =
{
for imgD in images
{
if let isHero = imgD[is_hero] as? Bool where isHero,
let t = imgD[thumbnail_signed_src] as? String
{
return t
}
}
return nil
} ()
Or, if you prefer, instead of using a closure, you can define a nested function
and call it to get the initial value.
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Re: Swift enums with raw values
On Jul 7, 2015, at 00:02 , Rick Mann rm...@latencyzero.com wrote:
I want to implement some support for HTTP Headers in enums, such that I can
write this:
extension
NSMutableURLRequest
{
func
set(inHeader : String, _ inVal : String)
{
self.setValue(inVal.rawValue, forHTTPHeaderField:
inHeader.rawValue())
}
}
and then call it like this:
req.set(.ContentType, .JSON)
req.set(.ContentType, some other type)
Like this:
extension NSMutableURLRequest
{
func setT, U where T: RawRepresentable, T.RawValue == String, U:
RawRepresentable, U.RawValue == String (inHeader : T, _ inVal : U)
{
self.setValue (inVal.rawValue, forHTTPHeaderField:
inHeader.rawValue)
}
}
At least, that compiles in a playground. As you say, overloading should work
for pure String values of the second parameter.
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Re: Possible to defer initialization of let variable?
On Jul 7, 2015, at 01:21 , Rick Mann rm...@latencyzero.com wrote:
let thumbURL: String?
for imgD in images
{
if let isHero = imgD[is_hero] as? Bool where isHero,
let t = imgD[thumbnail_signed_src] as? String
{
thumbURL = t
break
}
}
You’ve still got a path where ‘thumbURL’ is uninitialized — when ‘images’ is
empty. I’m not sure if there’s an elegant way to do it, but you can do it by
brute force something like this:
do
{
var url: String? = nil
for imgD in images
{
if let isHero = imgD[is_hero] as? Bool where isHero,
let t = imgD[thumbnail_signed_src] as? String
{
url = t
break
}
}
thumbURL = url
}
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Re: cannot invoke 'substringToIndex' with an argument list of type '(Int)'
On Jul 7, 2015, at 2:47 AM, Rick Mann rm...@latencyzero.com wrote: On Jul 7, 2015, at 00:46 , Charles Srstka cocoa...@charlessoft.com wrote: You don’t have an NSString. You have a String. It works differently. Well, they're toll-free bridged, and substringToIndex() is a method on NSString (or so I thought). Anyway, it turns out to be an error in the documentation, so now I understand. They are *not* toll-free bridged. When you cast one to the other, it actually does a conversion. The documentation is not incorrect; the method on NSString *does* take an Int. If you try it on strings that are actually typed as NSString, you’ll see that they take an Int: import Foundation let str = foobar as NSString let str2 = str.substringFromIndex(3) This results in str2 being “bar”. Swift Strings, however, follow different rules, in order to be safe about cases where a character in a string takes up more than one UTF-16 code unit. Charles ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: selectText of NSTextField on focus
On Jul 7, 2015, at 8:27 AM, Willeke willeke2...@gmail.com wrote:
Op 6 jul. 2015, om 18:15 heeft Richard Charles rcharles...@gmail.com het
volgende geschreven:
Does anyone have any insight into what is going on?
The animation of the focus ring isn't finished. If the focus ring is switched
off, the text is selected.
Safari's Address and Search field calls setSelectedRange: of currentEditor in
mouseDown:
- Willeke
Yes Safari’s Address and Search field has the behavior that I am looking for.
First click selects the entire text field and you also get an animated focus
ring.
Exactly how to achieve that on OS X 10.10 (with or without a focus ring) is
another matter. I have parred back my custom NSTextField subclass to just what
is shown below. A custom NSNumberFormatter is used but I removed it. The only
other thing going on is the text field is programmatically placed in the super
view.
Your initial suggestion.
@implementation MyTextField
- (instancetype)initWithFrame:(NSRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self.cell setFocusRingType:NSFocusRingTypeNone];
}
return self;
}
- (void)awakeFromNib
{
[self.cell setFocusRingType:NSFocusRingTypeNone];
}
- (BOOL)becomeFirstResponder
{
BOOL result = [super becomeFirstResponder];
if(result) {
[self performSelector:@selector(selectText:) withObject:self
afterDelay:0];
}
return result;
}
@end
RESULTS: Text is selected but rapidly changes to no selection. No focus ring as
expected. Intermittent error Bad cursor rect event, flags = 256.
You say that Safari apparently does this.
@implementation MyTextField
- (void)mouseDown:(NSEvent *)event
{
NSText *editor = self.currentEditor;
assert(editor Current editor is nil!);
assert(editor.isFieldEditor Editor not a field editor!);
NSRange range = NSMakeRange(0, editor.string.length);
[editor setSelectedRange:range];
[super mouseDown:event];
}
@end
RESULTS: Text not selected. Focus ring normal. No error message.
Another version of what Safari may do.
@implementation MyTextField
- (void)mouseDown:(NSEvent *)event
{
[self selectText:self];
[super mouseDown:event];
}
@end
RESULTS: Text is selected but rapidly changes to no selection. Focus ring is
intermittent. No error message.
So in summary Safari’s Address and Search field has the behavior that I am
looking for. First click selects the entire text field and you also get an
animated focus ring. However on OS X 10.10 Yosemite nothing works for me except
performSelector:withObject:afterDelay: using a non-zero delay value.
--Richard Charles
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Sizing NSScrollView width to exactly fit NSTableView
Hi, I’m trying to figure out how to correctly calculate the required width of an NSScrollView such that it will exactly fit the NSTableView inside, with no horizontal scroller and no “filler column” to the right of the last column in the table. The number of columns in the table changes based on the selection in an NSPopUpButton elsewhere on the screen. The columns are all the same width and are not resizable. When a new selection is made in the popup button, I want to reset the table with however many columns correspond to that selection, and then resize the scroll view’s width to exactly fit those columns. Both the height of the scroll view and the number of rows in the table are fixed, and there are more rows than will fit in the scroll view’s height so there will always be vertical scrolling — either legacy or overlay style depending on the user’s preference — so I need to account for the width of the vertical scroller when calculating the required width of the scroll view, if using a legacy scroller. From reading the docs, I gather that [NSScrollView frameSizeForContentSize:horizontalScrollerClass:verticalScrollerClass:borderType:controlSize:scrollerStyle] can be used to calculate the required frame size for the scroll view — but I don’t know how to calculate the required size of the table view to pass as the first argument (contentSize). I tried simply summing the column widths and using a dummy value for the height (since the height of the scroll view is fixed anyway), but that didn’t quite work (as I expected it wouldn’t) — the returned size wasn’t wide enough. Any pointers? Thanks! ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Any way to combine for and if-let?
On Jul 7, 2015, at 16:42 , Rick Mann rm...@latencyzero.com wrote: for item in enumerator! Like this: for case let item? in enumerator! (Yes, it’s stupid.) ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Any way to combine for and if-let?
On Jul 7, 2015, at 16:52 , Quincey Morris quinceymor...@rivergatesoftware.com wrote: On Jul 7, 2015, at 16:42 , Rick Mann rm...@latencyzero.com wrote: for item in enumerator! Like this: for case let item? in enumerator! (Yes, it’s stupid.) Hmm. It doesn't seem to like that: '?' pattern cannot match values of type 'Element'. It puts the carat on the '?' of item. Also, the enumerator is a NSDirectoryEnumerator. It returns AnyObject type, so wouldn't there have to be an NSURL cast in there somewhere? -- Rick Mann rm...@latencyzero.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Any way to combine for and if-let?
Thanks. I was looking at the Swift reference. The docs seem to be incorrect:
https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/Patterns.html#//apple_ref/swift/grammar/pattern
There are two type-casting patterns, the is pattern and the as pattern. Both
type-casting patterns appear only in switch statement case labels.
On Jul 7, 2015, at 17:26 , Quincey Morris
quinceymor...@rivergatesoftware.com wrote:
On Jul 7, 2015, at 16:58 , Rick Mann rm...@latencyzero.com wrote:
Also, the enumerator is a NSDirectoryEnumerator. It returns AnyObject type,
so wouldn't there have to be an NSURL cast in there somewhere?
Try:
for case let url as NSURL in enumerator
The way to figure these things out is to start with a switch statement, where
the patterns are a bit more intuitive, or at least better documented:
switch anyObject {
case let url as NSURL:
…
}
and the case is what you drop into the “for … in enumerator” statement.
--
Rick Mann
rm...@latencyzero.com
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Re: Any way to combine for and if-let?
On Jul 7, 2015, at 4:58 PM, Rick Mann rm...@latencyzero.com wrote:
On Jul 7, 2015, at 16:52 , Quincey Morris
quinceymor...@rivergatesoftware.com wrote:
On Jul 7, 2015, at 16:42 , Rick Mann rm...@latencyzero.com wrote:
for item in enumerator!
Like this:
for case let item? in enumerator!
(Yes, it’s stupid.)
Hmm. It doesn't seem to like that: '?' pattern cannot match values of type
'Element'. It puts the carat on the '?' of item.
Also, the enumerator is a NSDirectoryEnumerator. It returns AnyObject type,
so wouldn't there have to be an NSURL cast in there somewhere?
`for case` uses Swift's pattern matching system, as seen in `switch`. Something
like this should work:
for case let item as NSURL in enumerator! {
…
}
--
Greg Parker gpar...@apple.com Runtime Wrangler
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Re: Any way to combine for and if-let?
On 8 Jul 2015, at 08:26, Quincey Morris quinceymor...@rivergatesoftware.com wrote: On Jul 7, 2015, at 16:58 , Rick Mann rm...@latencyzero.com wrote: Also, the enumerator is a NSDirectoryEnumerator. It returns AnyObject type, so wouldn't there have to be an NSURL cast in there somewhere? Try: for case let url as NSURL in enumerator Two obersvations 1) If you’re sure it’s not nil, which for that particular case of an enumerator from a filemanager I’d agree it’s not (can’t make one work in a playground to test) then just force-unwrap it 2) As concise as ‘for case let url as NSURL in eumerator’ is, I think the original code was somewhat clearer for the next guy maintaining it ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Any way to combine for and if-let?
Is there any way to combine the for and if-let into one line that gives me
unwrapped NSURL objects to work on? I believe the enumerator (which came from
NSFileManager) will only have valid NSURLs in it.
for item in enumerator!
{
if let url = item as? NSURL
{
let sid = url.lastPathComponent!
print(Found: \(sid), \(url.path))
processModel(url)
}
}
--
Rick Mann
rm...@latencyzero.com
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Re: Any way to combine for and if-let?
On Jul 7, 2015, at 16:58 , Rick Mann rm...@latencyzero.com wrote:
Also, the enumerator is a NSDirectoryEnumerator. It returns AnyObject type,
so wouldn't there have to be an NSURL cast in there somewhere?
Try:
for case let url as NSURL in enumerator
The way to figure these things out is to start with a switch statement, where
the patterns are a bit more intuitive, or at least better documented:
switch anyObject {
case let url as NSURL:
…
}
and the case is what you drop into the “for … in enumerator” statement.
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Re: Any way to combine for and if-let?
On Jul 7, 2015, at 17:28 , Greg Parker gpar...@apple.com wrote: for case let item as NSURL in Yes, but you can’t honestly tell me you’re proud of that syntax, can you? ;) ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
How to get Unicode's General Category of a character?
Given a character (a Unicode code point, to be exact) like U+FF0B (FULLWIDTH
PLUS SIGN), I want to know the General Category of this.
For this example it would be “Sm (aka. Math_Symbol or Symbol, Math).
I could download the current version of UnicodeData.txt and parse it.
But this looks not very efficient.
For punctuation one could use NSCharacterSet punctuationCharacterSet.
But for Math Symbols?
I did look at CFStringTransform, which can give the Character name via
kCFStringTransformToUnicodeName.
But I cannot find anything for “General Category
NSRegularExpression can match for [\p{General_Category = Math_Symbol}]; not
quite what I want, but better than nothing.
Any ideas?
Gerriet.
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Re: How to get Unicode's General Category of a character?
ICU’s
u_charType
and after that you can use
// http://www.fileformat.info/info/unicode/category/index.htm
std::tuplestd::string, std::string u_charTypeName(UCharCategory c) {
switch (c) {
/*case U_UNASSIGNED:*/
case U_GENERAL_OTHER_TYPES:
return std::make_tuple(Cn,Other, Not Assigned (no characters in
the file have this property) );
case U_UPPERCASE_LETTER:
return std::make_tuple(Lu,Letter, Uppercase);
case U_LOWERCASE_LETTER:
return std::make_tuple(Ll,Letter, Lowercase);
case U_TITLECASE_LETTER:
return std::make_tuple(Lt,Letter, Titlecase);
case U_MODIFIER_LETTER:
return std::make_tuple(Lm,Letter, Modifier);
case U_OTHER_LETTER:
return std::make_tuple(Lo,Letter, Other);
case U_NON_SPACING_MARK:
return std::make_tuple(Mn,Mark, Nonspacing);
case U_ENCLOSING_MARK:
return std::make_tuple(Me,Mark, Enclosing);
case U_COMBINING_SPACING_MARK:
return std::make_tuple(Mc,Mark, Spacing Combining);
case U_DECIMAL_DIGIT_NUMBER:
return std::make_tuple(Nd,Number, Decimal Digit);
case U_LETTER_NUMBER:
return std::make_tuple(Nl,Number, Letter);
case U_OTHER_NUMBER:
return std::make_tuple(No,Number, Other);
case U_SPACE_SEPARATOR:
return std::make_tuple(Zs,Separator, Space);
case U_LINE_SEPARATOR:
return std::make_tuple(Zl,Separator, Line);
case U_PARAGRAPH_SEPARATOR:
return std::make_tuple(Zp,Separator, Paragraph);
case U_CONTROL_CHAR:
return std::make_tuple(Cc,Other, Control);
case U_FORMAT_CHAR:
return std::make_tuple(Cf,Other, Format);
case U_PRIVATE_USE_CHAR:
return std::make_tuple(Co,Other, Private Use);
case U_SURROGATE:
return std::make_tuple(Cs,Other, Surrogate);
case U_DASH_PUNCTUATION:
return std::make_tuple(Pd,Punctuation, Dash);
case U_START_PUNCTUATION:
return std::make_tuple(Ps,Punctuation, Open);
case U_END_PUNCTUATION:
return std::make_tuple(Pe,Punctuation, Close);
case U_CONNECTOR_PUNCTUATION:
return std::make_tuple(Pc,Punctuation, Connector);
case U_OTHER_PUNCTUATION:
return std::make_tuple(Po,Punctuation, Other);
case U_MATH_SYMBOL:
return std::make_tuple(Sm,Symbol, Math);
case U_CURRENCY_SYMBOL:
return std::make_tuple(Sc,Symbol, Currency);
case U_MODIFIER_SYMBOL:
return std::make_tuple(Sk,Symbol, Modifier);
case U_OTHER_SYMBOL:
return std::make_tuple(So,Symbol, Other);
case U_INITIAL_PUNCTUATION:
return std::make_tuple(Pi,Punctuation, Initial quote (may behave
like Ps or Pe depending on usage));
case U_FINAL_PUNCTUATION:
return std::make_tuple(Pf,Punctuation, Final quote (may behave
like Ps or Pe depending on usage));
default:
return std::make_tuple(,);
}
}
On Jul 7, 2015, at 8:03 AM, Gerriet M. Denkmann gerr...@mdenkmann.de wrote:
Given a character (a Unicode code point, to be exact) like U+FF0B (FULLWIDTH
PLUS SIGN), I want to know the General Category of this.
For this example it would be “Sm (aka. Math_Symbol or Symbol, Math).
I could download the current version of UnicodeData.txt and parse it.
But this looks not very efficient.
For punctuation one could use NSCharacterSet punctuationCharacterSet.
But for Math Symbols?
I did look at CFStringTransform, which can give the Character name via
kCFStringTransformToUnicodeName.
But I cannot find anything for “General Category
NSRegularExpression can match for [\p{General_Category = Math_Symbol}]; not
quite what I want, but better than nothing.
Any ideas?
Gerriet.
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Dmitry Markman
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Re: Swift Enums and CoreData
Ah, I see what you’re getting at. This is interesting. Previously when I’ve wanted to implement things like this I’ve used Transformable attributes, which provide an automatic packing/unpacking feature using a packing/unpacking class that I specify in the data model. It is necessary to be careful how one handles making sure the object is marked dirty appropriately, but that’s not too hard. In my case, I’m thinking of using this approach to map a data BLOB (stored as an NSDate object in CD) to a mutable dictionary. The dictionary keys would depend on which enumeration value is associated with the event. Cheers, Rick On Jul 6, 2015, at 6:29 PM, Quincey Morris quinceymor...@rivergatesoftware.commailto:quinceymor...@rivergatesoftware.com wrote: On Jul 6, 2015, at 16:21 , Rick Aurbach r...@aurbach.commailto:r...@aurbach.com wrote: Are you suggesting that we implement a custom fetched property No, I’m thinking of this: https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/CoreData/Articles/cdNSAttributes.html#//apple_ref/doc/uid/TP40001919-SW13 under the heading “Scalar Value”, but some of the details are here: https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/CoreData/Articles/cdAccessorMethods.html#//apple_ref/doc/uid/TP40002154-SW1 The idea is that you create non-primitive accessors that have a type that’s not known to Core Data. You back it with a Core Data property, using any convenient mechanism. Optionally, you can have an instance variable that caches the non-CD value, or you can just convert it back and forth on the fly. Note that you can, of course, back your customized property with multiple CD properties, or with a CD property whose value themselves have sub-properties. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Any way to combine for and if-let?
On Jul 7, 2015, at 17:30 , Roland King r...@rols.org wrote:
1) If you’re sure it’s not nil, which for that particular case of an
enumerator from a filemanager I’d agree it’s not (can’t make one work in a
playground to test) then just force-unwrap it
2) As concise as ‘for case let url as NSURL in eumerator’ is, I think the
original code was somewhat clearer for the next guy maintaining it
I couldn't figure out how to force-unwrap it in the for statement. If I can't
do it there, I have to introduce another variable, which is just smelly. E.g.:
for item in enumerator!
{
let unwrappedItem = item as! NSURL
}
(or something like that)
--
Rick Mann
rm...@latencyzero.com
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Re: Any way to combine for and if-let?
On Jul 7, 2015, at 17:51 , Greg Parker gpar...@apple.com wrote: The power of `case` outside `switch` was increased at some point. It's likely that the documentation has not caught up. You should file a bug report. I did. Thanks for the confirmation, though! -- Rick Mann rm...@latencyzero.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Any way to combine for and if-let?
On Jul 7, 2015, at 5:30 PM, Rick Mann rm...@latencyzero.com wrote: Thanks. I was looking at the Swift reference. The docs seem to be incorrect: https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/Patterns.html#//apple_ref/swift/grammar/pattern There are two type-casting patterns, the is pattern and the as pattern. Both type-casting patterns appear only in switch statement case labels. The power of `case` outside `switch` was increased at some point. It's likely that the documentation has not caught up. You should file a bug report. -- Greg Parker gpar...@apple.com Runtime Wrangler ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: How to get Unicode's General Category of a character?
Hi Gerriet
first of all it’s unicode/uchar.h header (not utypes.h)
I think it would be the best to download ICU distribution from
http://site.icu-project.org/download/55#TOC-ICU4C-Download
download sources and build it
in order to build you have to do the following
download and unarchive icu4c-55_1-src.tgz
cd icu
mkdir build
export CXXFLAGS='--std=c++11 --stdlib=libc++ -DUCHAR_TYPE=char16_t' (or add
--enable-debug for debug)
cd build
../source/configure --enable-shared --enable-static
—prefix=path_to_install_dir
make
make install
in include/unicode/platform.h immediately after lines
# if (defined(__cplusplus) __cplusplus = 201103L) ||
(defined(__STDC_VERSION__) __STDC_VERSION__ = 201112L)
# define U_HAVE_CHAR16_T 1
add the following
# define UCHAR_TYPE char16_t
try ICU if you are getting error U_MISSING_RESOURCE_ERROR, then
rebuild data from build/data directory: touch Makefile and just run make
Note: I tried to use homebrew, but I wasn’t able to build c++11 libraries that
use char16_t type
instructions from above will let you do just that
in order to build your application use the following switches
LDFLAGS: -Lpath_to_install_dir/lib
CPPFLAGS: -Ipath_to_install_dir/include
hope it will help
ask me off-list if you have any problem
cheers
dm
On Jul 7, 2015, at 9:10 AM, Gerriet M. Denkmann gerr...@mdenkmann.de wrote:
On 7 Jul 2015, at 19:33, Dmitry Markman dmark...@mac.com wrote:
ICU’s
u_charType
Looks exactly like what I need.
But: are the headers and the library on my Mac?
There is /usr/lib/libicucore.A.dylib which might contain u_charType, but I
cannot find any headers (e.g. utypes.h).
Do I have to download the source from ICU?
Kind regards,
Gerriet.
On Jul 7, 2015, at 8:03 AM, Gerriet M. Denkmann gerr...@mdenkmann.de
wrote:
Given a character (a Unicode code point, to be exact) like U+FF0B
(FULLWIDTH PLUS SIGN), I want to know the General Category of this.
For this example it would be “Sm (aka. Math_Symbol or Symbol, Math).
I could download the current version of UnicodeData.txt and parse it.
But this looks not very efficient.
For punctuation one could use NSCharacterSet punctuationCharacterSet.
But for Math Symbols?
I did look at CFStringTransform, which can give the Character name via
kCFStringTransformToUnicodeName.
But I cannot find anything for “General Category
NSRegularExpression can match for [\p{General_Category = Math_Symbol}]; not
quite what I want, but better than nothing.
Any ideas?
Gerriet.
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Dmitry Markman
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Re: How to get Unicode's General Category of a character?
On 7 Jul 2015, at 19:33, Dmitry Markman dmark...@mac.com wrote:
ICU’s
u_charType
Looks exactly like what I need.
But: are the headers and the library on my Mac?
There is /usr/lib/libicucore.A.dylib which might contain u_charType, but I
cannot find any headers (e.g. utypes.h).
Do I have to download the source from ICU?
Kind regards,
Gerriet.
On Jul 7, 2015, at 8:03 AM, Gerriet M. Denkmann gerr...@mdenkmann.de wrote:
Given a character (a Unicode code point, to be exact) like U+FF0B (FULLWIDTH
PLUS SIGN), I want to know the General Category of this.
For this example it would be “Sm (aka. Math_Symbol or Symbol, Math).
I could download the current version of UnicodeData.txt and parse it.
But this looks not very efficient.
For punctuation one could use NSCharacterSet punctuationCharacterSet.
But for Math Symbols?
I did look at CFStringTransform, which can give the Character name via
kCFStringTransformToUnicodeName.
But I cannot find anything for “General Category
NSRegularExpression can match for [\p{General_Category = Math_Symbol}]; not
quite what I want, but better than nothing.
Any ideas?
Gerriet.
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Re: selectText of NSTextField on focus
On Jul 6, 2015, at 5:49 PM, Joel Norvell framewor...@yahoo.com wrote:
Hi Richard,
When the instance of your NSTextField subclass becomes first responder, you
have access to the NSText object (the field editor) and I believe you can use
its methods to select the text. (I don't see why you can't, but since I
haven't tried it myself, I'm saying I believe.)
Sincerely,
Joel
Override - (BOOL)becomeFirstResponder in your subclass.
Get the field editor:
NSText * itsText = [[self window] fieldEditor:YES forObject:self];
Use -selectAll or -setSelectedRange
Yes I have access to the field editor for the NSTextField. Directly setting the
selection using the field editor however does not work.
- (BOOL)becomeFirstResponder
{
BOOL result = [super becomeFirstResponder];
if(result) {
NSText *editor = self.currentEditor;
assert(editor Current editor is nil!);
assert(editor.isFieldEditor Editor not a field editor!);
NSRange range = NSMakeRange(0, editor.string.length);
[editor setSelectedRange:range];
}
return result;
}
The above code does not work.
There is some sort of interaction between NSTextField (and or the field editor)
and the runloop that has changed for the worse in OS X 10.10 Yosemite. The only
code that works is to override becomeFirstResponder and then schedule the
selectText: message with the runloop to execute after a non zero delay. I have
not been able to get anything else to work.
A comment by Daniel Wabyick at the end of this stackoverflow question suggests
that this was a problem in OS X 10.9 Mavericks but have been unable to
duplicate that.
http://stackoverflow.com/questions/2195704/selecttext-of-nstextfield-on-focus
So in summary in OS X 10.10 selecting all the text of an NSTextField when the
user clicks it has become difficult.
--Richard Charles
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Re: Possible to defer initialization of let variable?
If you ask the wrong question, you get a wrong answer. :) Whether or not it was the wrong question is debatable. Honestly I find that assertion suspect considering that you've moved the goalposts three times. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Predicate warning from text view
On 25 Oct 2014, at 10:23 am, Martin Wierschin mar...@nisus.com wrote: I have a subclass of a text view in my app. When I double-click on other than a word (ie, a space or return), I get entries like these in the Console: _NSExtensionIsSafeExpressionForObjectWithSubquerySubstitutions: Expression considered unsafe: SUBQUERY(extensionItems, $extensionItem, $extensionItem.attachments.@count == 1 AND SUBQUERY($extensionItem.attachments, $attachment, (NOT ANY $attachment.registeredTypeIdentifiers UTI-CONFORMS-TO com.adobe.pdf) AND (NOT ANY $attachment.registeredTypeIdentifiers UTI-CONFORMS-TO public.image)).@count == 0).@count I observed this log statement during the Yosemite beta period, on a stock system with no additional extensions/apps installed, aside from my own app being tested on OS X 10.10. My app (which also uses an NSTextView subclass) produced that log statement, but TextEdit also produced a very similar log: TextEdit[578]: _NSExtensionIsSafeExpressionForObjectWithSubquerySubstitutions: Expression considered unsafe: SUBQUERY($extensionItem.attachments, $attachment, ANY $attachment.registeredTypeIdentifiers UTI-CONFORMS-TO public.image) I filed it as rdar://17541734 rdar://17541734 which was marked as a duplicate of rdar://17432480 rdar://17432480 which is apparently closed now. Perhaps the problem was reintroduced, or this has a different source? In any case, I never observed any actual ill effects in my app whenever the logging was triggered. Just coming back to this... I *think* that the number of these entries seems to have increased since I upgraded to 10.10.4 -- Console can be flooded with dozens at a time. But I've also found that they *stop* if turn off the Markup extension, and start back up when I turn it back on. Can anyone else who is seeing the problem confirm that turning Markup solves the problem? nd aAny thoughts on how I might get Markup to stop poking in my window, especially as it can't actually do anything there? -- Shane Stanley sstan...@myriad-com.com.au www.macosxautomation.com/applescript/apps/ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: selectText of NSTextField on focus
Op 6 jul. 2015, om 18:15 heeft Richard Charles rcharles...@gmail.com het volgende geschreven: Does anyone have any insight into what is going on? The animation of the focus ring isn't finished. If the focus ring is switched off, the text is selected. Safari's Address and Search field calls setSelectedRange: of currentEditor in mouseDown: - Willeke ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
