IOS动画Imageview拦截另一个图像

Question

因此，对于objective-c我是新手，并且我的图像始终在屏幕上上下移动，如果另一个图像触摸或拦截该图像，我将如何编码。这是我已经完成的动画代码，但仍然对如何编写第二部分感到困惑。谢谢你的帮助

动画：

//LINE ANAMATION
layer = line.layer;
CGPoint startPoint = (CGPoint){line.center.x,20};
CGPoint endPoint = (CGPoint){line.center.x, screenSizeY/2};

CGMutablePathRef thePath = CGPathCreateMutable();
CGPathMoveToPoint(thePath, NULL, startPoint.x, startPoint.y);
CGPathAddLineToPoint(thePath, NULL, endPoint.x, endPoint.y);

CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
animation.duration = 3.f;
animation.path = thePath;
animation.autoreverses = YES;
animation.repeatCount = INFINITY;
[layer  addAnimation:animation forKey:@"position"];

Answer 1

尝试：

if (CGRectIntersectsRect(self.imageView1.frame, self.imageView2.frame))  
{
   NSLog(@"Intersected!");
}
else
{
   NSLog(@"No intersection :(");
}