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Asked: 2026-05-24T23:46:10+00:00

I’m doing some hit testing and have run into a confusing situation. I have

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I’m doing some hit testing and have run into a confusing situation.

I have two buttons “favoriteButton” and “shareButton”. The following code results in ‘a’ and ‘b’ being true even though the buttons do not overlap:

CGPoint dunno = CGPointMake(11, 7);

BOOL a = [self.favoriteButton pointInside:dunno withEvent:nil];
BOOL b = [self.shareButton pointInside:dunno withEvent:nil];

and just to prove it, here is the description output for the two buttons at the point that this code is being called.

Printing description of _favoriteButton:
<UIButton: 0x5da8c90; frame = (10 6; 37 35); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x5da8d40>>
Printing description of _shareButton:
<UIButton: 0x5da7150; frame = (46 6; 30 35); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x5da59b0>>

Whats going on here? Am I misunderstanding what the output should be?

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1 Answer

  1. Editorial Team

    Well @Nippysaurus according to the documentation

    http://developer.apple.com/library/iOS/documentation/UIKit/Reference/UIView_Class/UIView/UIView.html#//apple_ref/occ/instm/UIView/pointInside:withEvent:

    A point that is in the receiver’s local coordinate system (bounds).

    That means that point CGPoint dunno = CGPointMake(11, 7); is inside the view as the bounds of the view will be different that the frame of the same view.

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