iOS 5.0 sendEvent called two [2] times

Question

I subclassed the UIWindow, but for some reason the - (void)sendEvent:(UIEvent *)event gets called 2 times for any interaction with the screen. Any ideas why would that happen?

Answer 1

For debugging purposes, subclass window (of app delegate) and override sendEvent: method

-(void) sendEvent:(UIEvent *)event
{
    NSLog(@"%@",event);
    [super sendEvent:event];
}

Most probably, you will notice the events responsible for TouchesBegan and TouchesEnded (for tapping). This can be tested by subclassing the View and overriding touch related methods.

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"tocuhesBegan");
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"touchesMoved");
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"touchesEnded");
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"touchesCancelled");
}

Also, try drag/swipe on the view to notice the change in count of events sent to view :)