iphone - "pointInside:"是如何工作的？

Question

我正在做一些 HitTest ，遇到了一个令人困惑的情况。

我有两个按钮“favoriteButton”和“shareButton”。即使按钮不重叠，以下代码也会导致“a”和“b”为真:

CGPoint dunno = CGPointMake(11, 7);

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

为了证明这一点，这里是调用此代码时两个按钮的描述输出。

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>>

这是怎么回事？我是否误解了输出应该是什么？

Answer 1

好吧，根据文档@Nippysaurus

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).

这意味着 CGPoint dunno = CGPointMake(11, 7); 点在 View 内部，因为 View 的边界与同一 View 的框架不同。