Re: Connecting a button to MyView zeros integers
Re: Connecting a button to MyView zeros integers
- Subject: Re: Connecting a button to MyView zeros integers
- From: Roland King <email@hidden>
- Date: Sat, 07 Feb 2015 10:43:48 +0800
I have no idea what stackoverflow is suggesting here but it looks entirely wrong as usual for that junky site. You're just creating a standalone I referenced object.
Right click your view in IB then wait a second and right click it again. I think it's right clicks. You will then get the outlet panel which is the grey HUD display with all the outlets and actions. You can drag connect to your buttons. There's some ctrl alt shift cmd combo which does this too but I never remember it. You can still connect view outlets as before, just that ctrl-drag was repurposed a couple of xcodes ago for auto layout so you have to work a little harder to get the inspector up.
> On 7 Feb 2015, at 10:22, N!K <email@hidden> 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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