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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)

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