UIImageViews 之间的碰撞检测

问题描述

我在玩 UIKit 动态，我有两个带有 UICollisionBehavior 的 UIImageViews，当两个视图碰撞时它的委托被触发，问题是，如果图像是圆形，则框架是正方形，甚至框架都是碰撞那不是我真正想要的.

I'm playing around with UIKit dynamics, I have two UIImageViews with an UICollisionBehavior, it's delegate is fired when the two views collide, the problem is, if the image is a circle the frame is a square and even the frames are colliding that's not what I really want.

如何检测碰撞:

我希望被检测到的方式:

How I want to be detected:

是否有解决方法来实现这一目标?提前致谢.

Is there a workaround to achieve this?. Thank you in advance.

更新:图像不是圆圈，所以我可能不得不使用 UIDynamicItemCollisionBoundsTypePath 并将我的 UIImage 转换为 UIBezierPath

UPDATE: The images aren't circles, so I'll probably have to use UIDynamicItemCollisionBoundsTypePath and transform my UIImage to a UIBezierPath

推荐答案

你应该创建一个 UIImageView 的子类并实现:

You should make a subclass of UIImageView and implement:

override var collisionBoundsType: UIDynamicItemCollisionBoundsType {
        return .Ellipse
    }

或

-(UIDynamicItemCollisionBoundsType) collisionBoundsType {
    return UIDynamicItemCollisionBoundsTypeEllipse;
}

有关详细信息，请参阅此处

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