Several ways to implement animations in iOS

1.UIView first-end animation (for gradient effect)

[UIView animateWithDuration:...]

After you have modified the constraints for automatic layout, execute the following code to animate the effect[UIView animateWithDuration:1.0 animations:^{
[添加了约束的view layoutIfNeeded];
}];

The 2.UIImageView startanimating series method plays a frame animation. 3. When modifying a partial property (animated property) of a non-root layer, some animation effects (implicit animation) are automatically generated by default 4. Core animations:

CABasicAnimationCAKeyframeAnimation帧动画CATransition转场动画（UIView也有转场动画）CAAnimationGroup组动画

5. Motion Picture GIF Implementation

UIImage *image=[UIImage animatedImageWithImages: duration:];

Several ways to implement animations in iOS