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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