CGAffineTransformIdentity在多次转换后没有重置UIImageView？

Question

我在顶部创建了一个带有分段控件的简单应用程序.当我单击控件的两个部分之一时,UIImageView开始旋转.我有一个重置按钮,将其变换设置为CGAffineTransformIdentity.

通过来回切换段来第二次调用执行视图旋转动画的方法时,会发生此问题.点击重置只会删除最新的动画.我必须第二次切换片段以完全重置动画停止.

当我选择旋转UIImageView的段时调用以下代码,当我在段之间单击时显然第二次调用.

// Begin the animation block and set its name
[UIView beginAnimations:@"Rotate Animation" context:nil];

// Set the duration of the animation in seconds (floating point value)
[UIView setAnimationDuration:0.5];

// Set the number of times the animation will repeat (NSIntegerMax setting would repeat indefinately) (floating point value)
[UIView setAnimationRepeatCount:NSIntegerMax];

// Set the animation to auto-reverse (complete the animation in one direction and then do it backwards)
[UIView setAnimationRepeatAutoreverses:YES];

// Animation curve dictates the speed over time of an animation (UIViewAnimationCurveEaseIn, UIViewAnimationCurveEaseOut, UIViewAnimationCurveEaseInOut, UIViewAnimationCurveLinear)
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

// Changes the imageViews transform property to rotate the view using CGAffineTransformRotate
// CGAffineTransformRotate(transformToStartFrom, angleToRotateInRadians)
// Starting transform property can be set to CGAffineTransformIdentity to start from views original transform state
// This can also be done using CGAffineTransformMakeRotation(angleInRadians) to start from the IdentityTransform without implicitly stating so
self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, degreesToRadians(90));

[UIView commitAnimations];

重置按钮调用此代码 -

self.imageView.transform = CGAffineTransformIdentity;

Answer 1

试试这个

[UIView animateWithDuration:0.2 animations:^() {

    self.imageView.transform = CGAffineTransformIdentity;



}];