Question

我正在尝试进行UIView动画，其中我的图像从屏幕的左上角开始，并扩展到原始大小并放置在屏幕中间。到目前为止，我已经能够分别做到这一点但是当我尝试组合这些动画时，它只会进行缩放动画。

我是否可以通过同时进行缩放和翻译来实现此功能？

这是我到目前为止所做的：

CGAffineTransform setpointTrans = CGAffineTransformMakeTranslation(-200.0f, -200.0f);
CGAffineTransform setpointScale = CGAffineTransformMakeScale(0.0f, 0.0f);
_RSEImage.transform = CGAffineTransformConcat(setpointTrans, setpointScale);
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDelegate:self];
[UIView setAnimationDuration:5];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
CGAffineTransform scaleTrans  = CGAffineTransformMakeScale(1.0f, 1.0f);
CGAffineTransform lefttorightTrans  = CGAffineTransformMakeTranslation(0.0f,0.0f);
_RSEImage.transform = CGAffineTransformConcat(scaleTrans, lefttorightTrans);
[UIView commitAnimations];

好的我明白了，这就是我改变了：

_RSEImage.transform = CGAffineTransformMakeScale(0.0f, 0.0f);
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDelegate:self];
[UIView setAnimationDuration:5];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
CGAffineTransform scaleTrans  = CGAffineTransformMakeScale(1.0f, 1.0f);
CGAffineTransform lefttorightTrans  = CGAffineTransformMakeTranslation(200.0f,200.0f);
_RSEImage.transform = CGAffineTransformConcat(scaleTrans, lefttorightTrans);
[UIView commitAnimations];

Answer 1

您也可以使用此动画块（来自iOS4）：

[UIView animateWithDuration: 5
                      delay: 0
                    options: (UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction)
                 animations:^{_RSEImage.center = CGPointMake(300, 300) ; _RSEImage.transform = CGAffineTransformScale(CGAffineTransformIdentity, 2.0, 2.0);}
                 completion:^(BOOL finished) { }
 ];

此处的相关官方文档：link

那里很好的教程：link

希望它有所帮助！

如何结合比例和翻译动画

1 个答案: