Passing through touches to UIViews underneath

Question

I have a UIView with 4 buttons on it and another UIView on top of the buttons view. The top most view contains a UIImageView with a <

Answer 1

Look into the UIGestureRecognizerDelegate Protocol. Specifically, gestureRecognizer:shouldReceiveTouch:

You'll want to make each UIGestureRecognizer a property of your UIViewController,

// .h
@property (nonatomic, strong) UITapGestureRecognizer *lowerTap;

// .m
@synthesize lowerTap;

// When you are adding the gesture recognizer to the image view
self.lowerTap = tapGestureRecognizer

Make sure you make your UIViewController a delegate,

[self.lowerTap setDelegate: self];

Then, you'd have something like this,

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    if (expanded && gestureRecognizer == self.lowerTap) {    
        return NO;
    }
    else {
        return YES;
    }
}

Of course, this isn't exact code. But this is the general pattern you'd want to follow.