UITextView touch events not firing

Question

I have a UITextView that I want to detect a single tap for.

It looks like I would be fine with simply overriding touchesEnded:withEvent and checking [[touches anyObject] tapCount] == 1 , however this event doesn't even fire.

If I override the 4 events like this:

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    NSLog(@"touchesBegan (tapCount:%d)", touch.tapCount);
    [super touchesBegan:touches withEvent:event];
}

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
        NSLog(@"touches moved");
}

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    NSLog(@"touchesEnded (tapCount:%d)", touch.tapCount);
        [super touchesEnded:touches withEvent:event];
}

-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
        NSLog(@"touches cancelled");
}

I get output like this:

> touchesBegan (tapCount:1)
> touchesCancelled 
> touchesBegan (tapCount:1) 
> touches moved 
> touches moved
> touches moved 
> touchesCancelled

It seems I never get the touchesEnded event.

Any ideas?

Answer 1

You can turn off Cut/Copy/Paste by overriding the canPerformAction:withSender: method, so you could just return NO for all the actions you don't want to permit.

See the UIResponder documentation...

Hopefully that will stop your touches from being eaten.

Answer 2

Update: I ended up using the technique here: https://devforums.apple.com/message/94569#94569

I'm not sure if this is a bug or not, but the UITextView does need to utilize the touch events to do the popup menu for copy & paste for 3.0, so that might explain why it swallows this event.

Pretty lame if you ask me.

Update: I blogged about this here: http://flux88.com/blog/detecting-a-tap-on-a-uitextview/