iOS 翻转 UIImageView 180 度（非动画）

Question

How can I flip a UIImageView 180 degrees, but NOT animating the flip. I just want when it loads, to show it 180 degrees of the original image.

Answer 1

In viewDidLoad or in the method where you are loading the image, do the following:

imageView.transform = CGAffineTransformMakeRotation(M_PI);

Hope this helps.

Answer 2

斯威夫特 5.2

imageView.transform = CGAffineTransform(rotationAngle: CGFloat.pi)