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问题描述
我已阅读并试用此
我在我的应用程序中实现以下代码:
And I implement following code in my app:
CALayer *layer = threeHomeView.layer;
CATransform3D initialTransform = threeHomeView.layer.transform;
initialTransform.m34 = 1.0 / -900;
[UIView beginAnimations:@"Scale" context:nil];
[UIView setAnimationDuration:3];
layer.transform = initialTransform;
CATransform3D rotationAndPerspectiveTransform = threeHomeView.layer.transform;
rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform
, 40.0f * M_PI / 180.0f
, 0.0f
, 1.0f
, 0.0f);
layer.transform = rotationAndPerspectiveTransform;
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(threeHomeFlyOut)];
[UIView commitAnimations];
threeHomeView是一个UIImageView。
threeHomeView is an UIImageView.
我的问题是:图像只能按图像的中间垂直线旋转,但我想让它按图像的左垂直线旋转。
MY QUESTION IS: the image can only rotate by middle vertical line of the image, but I want it to rotate by left vertical line of the image.
推荐答案
使用 CATransform3DRotate
就像你和 CATransform3DTranslate一样/ code>围绕边缘旋转,就像我在。这里有一些摘录(您需要根据自己的需要对其进行修改):
Use CATransform3DRotate
like you did in combination with CATransform3DTranslate
to rotate around the edge, like I did in this answer. Here's a little excerpt (you will need to modify this for your own uses):
CATransform3D t = CATransform3DIdentity;
t = CATransform3DTranslate(t, 0, -self.view.bounds.size.height/2, 0);
t = CATransform3DRotate(t, rec.scale * M_PI, 1, 0, 0);
t = CATransform3DTranslate(t, 0, -self.view.bounds.size.height/2, 0);
self.view.layer.transform = t;
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