如何将 UIView、UIImageView 或 CALayer 动画旋转 360°？

你如何旋转UIView, UIImageView or CALayer不使用 OpenGL ES 进行 360 度动画？

#import <QuartzCore/QuartzCore.h>

CABasicAnimation *fullRotation;
fullRotation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
fullRotation.fromValue = @(0.0);
fullRotation.toValue = @((360.0 * M_PI)/180.0);
fullRotation.duration = 3.5f;
fullRotation.repeatCount = MAXFLOAT;

[view.layer addAnimation:fullRotation forKey:@"rotation-animation"];   

如果你想改变它旋转的锚点，那么你可以这样做

CGRect frame = view.layer.frame;
self.anchorPoint = CGPointMake(0.5, 0.5); // rotates around center
self.frame = frame;