iphone图像移动像另一个图像

Question

我有一个图像旋转，我想要的是第二个图像卡在它上面，它像第一个旋转。请，我该怎么做？

Answer 1

我不在我的电脑，所以我不能测试这个，但我认为它应该得到你想要的。

// assuming you already have your views 
// viewOne, viewTwo 

[viewOne addSubview:viewTwo]; // add viewTwo to viewOne 

// let's assume that you call this code here one time per second 
[UIView beginAnimations:nil context:nil]; 
[UIView setAnimationDuration:1.0]; 
[UIView setAnimationCurve:UIViewAnimationCurveLinear]; 

// when this is 1.0, the image will rotate 360 
// ... when it is .5, it should rotate 180, etc... 
float rotationFactor = 0.1f; 

// viewTwo's rotationFactor will be added to view 1's in the transform below 
float rotationFactor2 = 0.1f; 

viewOne.transform = CGAffineTransformMakeRotation(M_PI_2 * rotationFactor); 
viewTwo.transform = CGAffineTransformMakeRotation(M_PI_2 * (rotationFactor + rotationFactor2); 

[UIView commitAnimations];