更改UIView的范围，并让UICollisionBehavior对其做出反应 [英] Change bounds of UIView and have UICollisionBehavior react to it

问题描述

是否可以更改UIView(使用UIAttachmentBehaviors附加到某些其他UIViews)的边界，并使UICollisionBehavior与UIAttachmentBehavior结合使用(例如此处的示例影片:

Is it possible to change the bounds of a UIView (which is attached to some other UIViews using UIAttachmentBehaviors) and have the UICollisionBehavior in combination with the UIAttachmentBehavior respond to it (like the sample movie here: http://www.netwalkapps.com/ani.mov, whereby upon touch the ball UIView grows and the other ball UIViews move out of the way)?

谢谢！ 汤姆.

推荐答案

我可以使用它，但是它很hacky.我不得不从我的动画师对象中删除所有行为，然后重新添加它们.

I got this to work but it was pretty hacky. I had to remove all behaviors from my animator object and re-add them again.

- (void)_tickleBehaviors
{
    NSArray *behaviors = [self.animator.behaviors copy];
    for (UIDynamicBehavior *behavior in self.animator.behaviors) {
        [self.animator removeBehavior:behavior];
    }

    for (UIDynamicBehavior *behavior in behaviors) {
        [self.animator addBehavior:behavior];
    }
}

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