Touches Ended not being called

Question

I've playing around with recognizing the touches in an iOS Application, and I have this simple code

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
 NSLog(@"%lu",(unsigned long)[touches count]);
 [touches enumerateObjectsUsingBlock:^(id obj, BOOL *stop) {
     UITouch *touch = obj;
     CGPoint touchLocation = [touch locationInNode:self.scene];
     NSLog(@"B x:%f - y:%f",touchLocation.x,touchLocation.y);
 }];
}

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
 [touches enumerateObjectsUsingBlock:^(id obj, BOOL *stop) {
    UITouch *touch = obj;
    CGPoint touchLocation = [touch locationInNode:self.scene];
    NSLog(@"E x:%f - y:%f",touchLocation.x,touchLocation.y);
 }];
}

The touchesBegan is being called fine, if I place from 1 finger up to 5 fingers on the screen at the same time, I see it being called with the correct information

The same doesn't happen with touchesBegan, many time if I have 3 fingers on the screen and remove them simultaneously, I only see information on 2 touches being ended (and sometimes even 1). If I take the fingers out one at a time, the method also usually gets called 2 times (sometimes 1, although rarely it will be called the correct 3 times) As the number of touches increases, also the likely hood of some information not being shown in the touchesEnded method

Methods touchesMoved:withEvent: and touchesCancelled:withEvent: are also implemented, with the same logic

Can someone explain this behavior? Is there something I'm missing?

Answer 1

You'd have to set recognizer.cancelsTouchesInView = false in Swift or recognizer.cancelsTouchesInView = NO; in Objective-C