Question

我想基于其左上角（原点）的值来设置视图位置的动画。我试过了两次

CGPoint myPosition = CGPointMake(0, 500);
CABasicAnimation *yAnimation = [CABasicAnimation animationWithKeyPath:@"frameOrigin"];
yAnimation.toValue = [NSValue valueWithCGPoint:myPosition];

和

CGPoint myPosition = CGPointMake(0, 500);
CABasicAnimation *yAnimation = [CABasicAnimation animationWithKeyPath:@"origin"];
yAnimation.toValue = [NSValue valueWithCGPoint:myPosition];

没有任何作用。如何正确设置此属性的动画？

Answer 1

如果您只想为视图的位置设置动画，请查看UIViewAnimation并使用带有它的块。

[UIView animateWithDuration:.7
        animations:^{
           //what you would like to animate
           myView.frame = CGRectMake(myView.frame.origin.x + 100,myView.frame.origin.y + 100, myView.frame.size.width, myView.frame.size.height);
        }completion:^(BOOL finished){
          //do something when the animation finishes
        }];

Answer 2

origin上没有frameOrigin或CALayer关键路径，如果您想为bounds属性设置动画所需的位置设置动画

我如何动画原点？

2 个答案: