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iosobjective-cnstimer

Disable a button on a timer iOS

I am making a timer app on XCode 7 using Objective-C and I would like to disable the button that is connected to the action startCount while the following code is being executed

- (IBAction)startCount:(id)sender {

countInt = 0;
self.Label.text = [NSString stringWithFormat:@"%i", countInt];
timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(countTimer) userInfo:nil repeats:YES];
}

What line of code would I need to add to this to disable the button connected to the action startCount?

Thanks

Solution

  • You need to disable the sender via the enabled flag:

    ((UIButton*)sender).enabled = false;

    Don't forget to re-enable the button after the timer finishes.

    If the enabled state is NO, the control ignores touch events [...]

    Alternatively to the cast I made in the above code: Change your method signature to take in a UIButton*, not just an id, that way you can make sure the cast will not fail. A slight variation of the cast would be to cast to UIControl* instead.