how to rotate UIIMageVIew with fix point?

Question

I want to rotate image on angle.But i wnt to rotate image with fix point.How can i set this fix point?

Answer 1

Set the view's layer's anchorpoint, which is in view-local coordinates from 0 to 1. That is, the top left is 0,0 and the bottom right is 1,1.

For example, the default is to rotate around the center:

imageView.layer.anchorPoint = CGPointMake(.5,.5);

If you want to rotate around the origin:

imageView.layer.anchorPoint = CGPointMake(0,0);

Or the middle right edge:

imageView.layer.anchorPoint = CGPointMake(1,.5);