UIBarButtonItem not responding to touch

[AcousticBlue]

I am doing some real basic animation using an NSTimer - it works great. However, I have since tried to have a button update it's title based on whether the animation is on or off and to reset/kill the timer based on the same. (The button is part of a UIToolbar)...

Here is my code:

- (IBAction)startid)sender
{
UIBarButtonItem *button = (UIBarButtonItem *)sender;
NSString *title = (timer!=nil) ? @"Start" : @"Stop";
if (timer!=nil)
{
[timer invalidate];
[timer release];
timer = nil;
} else {
timer = [NSTimer scheduledTimerWithTimeInterval:0.025 target:self selector:@selector(tick) userInfo:nil repeats:YES];
}
[button setTitle:title];
}

This works great in the simulator. However, on the actual device, it works the first time you touch the start button. However, when you then try to stop it, the button no longer responds to a user touch. I am at a complete loss. Does the UIBarButtonItem change its respondToEvents status when it's title is changed? I would think this would also effect the simulator. The only other thing I can think of is that I am not releasing the NSTimer properly for the device to respond correctly. Can anyone help?

Thanks,
Charles

[Legrend]

Hey,

I'm kind of new to programming in general and Objective-C, Cocoa, Xcode, and pretty much everything in general, but personally I hate the tunary operator. I would ditch it as it has caused me issues in other API's I've used.

Other than that, I would put a NSLog in your function call.

- (IBAction)start:(id)sender
{
     NSLog(@"Entering: (IBAction)start:(id)sender");

     UIBarButtonItem *button = (UIBarButtonItem *)sender;
     NSString *title = (timer!=nil) ? @"Start" : @"Stop";
     if (timer!=nil)
     {
          NSLog(@"(timer != nil) == TRUE))";
          [timer invalidate];
          [timer release];
          timer = nil;
    } 
    else 
    {
          NSLog(@"(timer != nil) == FALSE))";
         timer = [NSTimer scheduledTimerWithTimeInterval:0.025 target:self selector:@selector(tick) userInfo:nil repeats:YES];
    }
    [button setTitle:title];

NSLog(@"Exiting: (IBAction)start:(id)sender");
}

Hope this will help a little. I figure any suggestions is better than none.

[skiptrace]

Originally Posted by AcousticBlue

This works great in the simulator. However, on the actual device, it works the first time you touch the start button. However, when you then try to stop it, the button no longer responds to a user touch. I am at a complete loss. Does the UIBarButtonItem change its respondToEvents status when it's title is changed? I would think this would also effect the simulator. The only other thing I can think of is that I am not releasing the NSTimer properly for the device to respond correctly. Can anyone help?

Did you ever get this resolved?

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