iOS装置：用于按钮非正方形灾区 [英] iOS: Non-square hit areas for buttons

问题描述

我需要互相重叠的一些三角形的按钮。

I need to make some triangular buttons that overlap each other.

虽然UIButtons可以采取透明的图像作为背景，UIControls可以自定义视图，这些点击区域始终是方形。我如何能为我的按钮创建一个三角形hitarea？

While UIButtons can take transparent images as backgrounds, and UIControls can have custom views, the hit area of these is always square. How can I create a triangular hitarea for my buttons?

我来自一个闪光的背景，所以我通常会创造我认为一个hitarea，但我不相信我可以在可可做到这一点。

I come from a FLash background so I would normally create a hitarea for my view, but I don't believe I can do this in Cocoa.

任何提示？

推荐答案

您可以通过继承的UIButton 并提供实现这一主题：

You can achieve this by subclassing UIButton and providing your own:

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event {
    // return YES if point is inside the receiver’s bounds; otherwise, NO.
}

<一个href=\"http://developer.apple.com/library/ios/#documentation/uikit/reference/UIView_Class/UIView/UIView.html\"相对=nofollow>苹果的UIView的文档提供了详细信息，如确认点已经接收器的坐标系中

Apple's UIView Documentation provides the details, such as confirming that point is already in the receiver's coordinate system.

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