How to realize non-central point rotation by View
This article mainly shows you "View how to achieve non-central point rotation", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to achieve non-central point rotation" this article.
Set the anchor point for the calayer of view
View.layer.anchorPoint = CGPointMake (0,0)
Animation
View.layer.transform = CATransform3DRotate (view.layer.transform, 180.0 * M_PI / 180.0, 0.0f, 0.0f, 1.0f)
View.layer.transform = CATransform3DMakeRotation (number of angles * M_PI / 180.0, 0.0f, 0.0f, 1.0f)
The maximum rotation is 180 degrees.
View.layer.anchorPoint = CGPointMake (0,0)
When Point is (0,0), it rotates according to the point in the upper right corner of view.
(1, 1) rotate according to the point in the lower left corner of view
When the number of angles of 179.0 * M_PI / 180.0 is greater than 180, rotate downward, and rotate upward when less than 180.
Parameter 1. The angle of the view now
The angle that parameter 2 will change
Parameter 3 changes the X axis
Parameter 4 / 5 changes y / z axis
CATransform3DRotate (self.fcImageView.layer.transform, M_PI_4, 0,0jin1)
The above is all the content of the article "how to achieve non-central point rotation of View". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!
