Re: [swift-users] Writing a pod catcher for iOS

Incidentally, the book *iOS 10 SDK Development * by Chris Adamson walks you through building a podcast player. If you go to the linked product page, you can even see some livestream captures on Vimeo for free that cover a lot of this material

Re: [swift-users] UIview frame and bounds properties

For this you’ll want to use computed properties. let isn’t the right choice since these aren’t constants—they change as the view resizes. Instead, computed properties using var will work: extension UIView { var width: CGFloat { return frame.size.width } } That extension will add a width p

Re: [swift-users] for with optional collection?

You can do something like this: someOptionalCollection?.forEach { item in item.doSomething() } Or this: (someOptionalCollection as? [SomeType])?.forEach { item in item.doSomething() } Jeff Kelley slauncha...@gmail.com | @SlaunchaMan | jeffkell

Re: [swift-users] Referencing Swift Functions from the Objective-C Runtime

test? If we > can help you by modifying corelibs-xctest itself, that could be another > option here. :) > > - Brian Gesiak > > > On Mon, Nov 21, 2016 at 10:46 AM, Jeff Kelley via swift-users < > swift-users@swift.org> wrote: > >> The type comes from XCTest. I

Re: [swift-users] Referencing Swift Functions from the Objective-C Runtime

; | @SlaunchaMan >> <https://twitter.com/SlaunchaMan> | jeffkelley.org <http://jeffkelley.org/> >>> On Nov 19, 2016, at 1:58 AM, Jacob Bandes-Storch >> <mailto:jtban...@gmail.com>> wrote: >>> >>> I imagine unsafeBitCast would be the way to go here.

Re: [swift-users] Referencing Swift Functions from the Objective-C Runtime

://jeffkelley.org/> >> On Nov 19, 2016, at 1:58 AM, Jacob Bandes-Storch > <mailto:jtban...@gmail.com>> wrote: >> >> I imagine unsafeBitCast would be the way to go here. But are you assuming >> that all of the instance methods have type "(Foo) throws -> Void&qu

Re: [swift-users] Referencing Swift Functions from the Objective-C Runtime

ou assuming > that all of the instance methods have type "(Foo) throws -> Void" ? Or do you > somehow want to dynamically use the type information? > > Jacob > > On Fri, Nov 18, 2016 at 10:37 PM, Jeff Kelley via swift-users > mailto:swift-users@swift.org>&

[swift-users] Referencing Swift Functions from the Objective-C Runtime

Hello, I’m trying to enumerate the methods of a class in Swift using the Objective-C runtime. Everything is working fine so far, except for the very last step. Suppose I have a Swift class like this: class Foo: SomeSuperclass { @objc func bar() { print("Hello, World!")

Re: [swift-users] Segmentation fault: 11 after updating codebase to Swift 3.0

When I get into these situations, I never find myself using our DTS incidents, but that’s what they’re for. If you have any left, it’s always a good option to look into. Jeff Kelley slauncha...@gmail.com | @SlaunchaMan | jeffkelley.org

Re: [swift-users] Cleaner way than if let initialization?

That’s where I would use the ?? operator: let dobString = serverDateFormatter.stringFromDate(dob) ?? "" Jeff Kelley slauncha...@gmail.com | @SlaunchaMan | jeffkelley.org > On Aug 4, 2016, at 1:32 PM, Daniel Tartaglia via swift-users >

Re: [swift-users] Why does Array subscript fail at runtime?

If I’m not mistaken, the main reason for Swift arrays being unsafe in this way is for performance. Checking each subscript would be expensive in a large loop; it’s much more performant to loop from the array’s start index to its end index. Jeff Kelley slauncha...@gmail.com | @SlaunchaMan

Re: [swift-users] Equality is broken, isn't it?

I wouldn’t expect String and NSString to have identical implementations of hashValue(). Is there a problem you’re having that this example is meant to illustrate? I can see this being an issue if you’re building your own collection type for strings. Jeff Kelley slauncha...@gmail.com | @Slaunc

[swift-users] Where did “powl” go?

Hello all, I’m using Xcode 8.0 and Swift 3 on OS X 10.11, and I’m trying to use powl in an OS X Playground. I see the definition of the pow-related functions in math.h here: extern float powf(float, float); extern double pow(double, double); extern long double powl(long double, long dou

Re: [swift-users] Generic type metadata pattern not found?

Are you installing the internal frameworks themselves via CocoaPods? That was my next step on a previous Swift project and I never got around to it, but it also predates CocoaPods 1.0’s release. My idea was to use the Podfile like so: pod “InternalFramework”, :path=>’.' This gets the dependenc

Re: [swift-users] Swift 3.0 Preview 1 Snapshots available!

r”. > > Ted > >> On Jun 2, 2016, at 7:42 AM, Jeff Kelley via swift-users >> mailto:swift-users@swift.org>> wrote: >> >> Is it just me, or is there no Swift 3 download on that page? I see a 2.2.1 >> release branch download but nothing for 3. >> &g

Re: [swift-users] Swift 3.0 Preview 1 Snapshots available!

Is it just me, or is there no Swift 3 download on that page? I see a 2.2.1 release branch download but nothing for 3. Jeff Kelley slauncha...@gmail.com | @SlaunchaMan | jeffkelley.org On Tue, May 31, 2016 at 5:42 PM, Mishal Shah via swift-users < swift-users@sw

Re: [swift-users] Replacement for NSNumber?

One possible solution is to create an empty Protocol that both Int and Double conform to, perhaps DataValue, and then create your data structure like this: var data: [String: DataValue] Jeff Kelley slauncha...@gmail.com | @SlaunchaMan | jeffkelley.org

Re: [swift-users] What is [weak self]?

/doc/uid/TP40014097-CH20-ID56> > > Jacob Bandes-Storch > > On Mon, Dec 14, 2015 at 8:50 PM, Jeff Kelley via swift-users > mailto:swift-users@swift.org>> wrote: > Just looking for a technical term here: what is [weak self] at the beginning > of a closure? An

[swift-users] What is [weak self]?

Just looking for a technical term here: what is [weak self] at the beginning of a closure? An annotation? Thanks in advance! Jeff Kelley slauncha...@gmail.com | @SlaunchaMan | jeffkelley.org