On Feb 13, 2015, at 8:42 AM, David Duncan <david.dun...@apple.com> wrote:
> Since you elided your header file, this begs a question – is this iOS or OS X?
This is OSX.
I was following Apple’s example, which control-drags from a button to the .m
file. The .h file isn’t used. I supplied the shortest possible file to avoid
confusion.
>
> If I’m not mistaken, subclasses of NSView do not get -initWithCoder:, but
> rather -initWithFrame:, which begs the question of have you confirmed that
> your -initWithCoder: method is being called?
Yes. With a breakpoint.
InitWithCoder is called because Runtime Behavior, Instantiation, Prefer Coder
is checked in xib’s inspector.
There was quite a discussion about why it works this way 12/23/14 - 12/30/14,
in response to my request for help, “initWithFrame fails” Roland King nailed
it in his email 12/26/2014.
Nick
>
>> On Feb 6, 2015, at 6:22 PM, N!K <pu56ucl...@alumni.purdue.edu> wrote:
>>
>>
>> I would like to connect a button to MyView class, but Xcode 6.1.1 only
>> allows control-dragging a button to AppDelegate to create an IBAction. I
>> have not encountered this previously. Looking for a workaround, I found this
>> recommendation in a couple of Stack Overflow and other web pages as well as
>> a YouTube video. It enables the button to work, but unfortunately it zeros
>> all the integers in MyView.
>>
>> The recommendation is:
>> 1. Drag an empty Object from the IB library to the column of blue icons.
>> 2. Set its class to MyView.
>> 3. Control-drag from the button to MyView.m
>> 4. Fill in the name (“act”) in the popup.
>> This puts the IBAction template into MyView, ready to fill in.
>>
>> #import "MyView.h"
>>
>> @implementation MyView
>>
>> - (id)initWithCoder:(NSCoder *)aDecoder
>> {
>> self = [super initWithCoder:aDecoder];
>> if (self) {
>> iii=1000;
>> k=99;
>> }
>> return self;
>> }
>>
>> - (IBAction)act:(id)sender {
>> iii=iii+1;
>> NSLog(@" iba i= %i",iii);
>> }
>>
>>
>> In MyView.m, iii=1000 is initialized in initWithCoder. At the breakpoint
>> after IBAction, iii is seen in both places to have the value 1, not 1001,
>> by hovering. It was zeroed and then incremented after clicking on Button in
>> the View. Similarly, k is initialized to 99 and then zeroed. Both are ivars
>> in MyView.h.
>>
>> Clearly, zeroing all the integers is not acceptable. Can this approach be
>> saved? Having the IBAction in MyView is desirable for directly relating its
>> functions to the rest of MyView, rather than indirectly from AppDelegate. On
>> the other hand, Xcode may have very good reasons – unknown to me – for
>> restricting IBAction to AppDelegate. Maybe timing?
>>
>> Thanks in advance,
>>
>> Nick
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>
> --
> David Duncan
>
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