如何在 ios 中获取动画 uiview 的当前位置

Question

我想要在动画期间为 UIView 设置动画的当前位置，我正在使用此代码。

CABasicAnimation * m_pAnimationObj = [CABasicAnimation animationWithKeyPath:@"transform.translation"];
[m_pAnimationObj setFromValue:[NSValue valueWithCGPoint:CGPointMake(0,-50)]];
[m_pAnimationObj setToValue:[NSValue valueWithCGPoint:CGPointMake(0,[UIScreen mainScreen].bounds.size.height+100)]];
m_pAnimationObj.duration = 2.0;
m_pAnimationObj.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
[DropImage.layer addAnimation:m_pAnimationObj forKey:@"animations"];

如果有人知道这件事，请回答。 提前致谢！

Answer 1

使用此代码：

CGRect currentCenter = [drawingView.layer.presentationLayer center];

或

CGRect currentFrame = [DropImage.layer.presentationLayer frame];