1 // 简单block动画
 2 - (IBAction)simpleBlock:(UIButton *)sender{
 3     [UIView animateWithDuration:2 animations:^{
 4         CGPoint point = self.planeImageView.center;
 5         point.y += 100;
 6         self.planeImageView.center = point;
 7     } completion:^(BOOL finished) {
 8         NSLog(@"动画结束");
 9         [UIView animateWithDuration:2 animations:^{
10             CGPoint point = self.planeImageView.center;
11             point.y -= 100;
12             self.planeImageView.center = point;
13         } completion:nil];
14         
15     }];
16 }

1 // 复杂的block
2 - (IBAction)complexBlock:(UIButton *)sender {
3     [UIView animateWithDuration:2 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
4         self.planeImageView.transform = CGAffineTransformRotate(self.planeImageView.transform, M_PI / 180 * 90);
5     } completion:^(BOOL finished) {
6         // 还原到初始形变
7 //        self.planeImageView.transform = CGAffineTransformIdentity;
8     }];
9 }

 1 // 过度动画, 转场动画
 2 - (IBAction)transitionAnimation:(UIButton *)sender {
 3     [UIView beginAnimations:nil context:nil];
 4     [UIView setAnimationDuration:2];
 5     // 第一个参数: 转场动画的类型
 6     // 第二个参数: 给哪个对象添加转场动画
 7     // 第三个参数: 缓存设置(YES执行效率更高)
 8     [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:self.label cache:YES];
 9     self.label.text = @"熊大熊二的故事";
10     [UIView commitAnimations];
11 }

 1 // 弹簧动画
 2 - (IBAction)sprintAnimation:(UIButton *)sender {
 3     // 1. 动画时长
 4     // 2. 延迟时间
 5     // 3. 阻尼系数, 越大, 弹簧形变越小
 6     // 4. 速度
 7     // 5. 动画类型选项
 8     [UIView animateWithDuration:2 delay:0 usingSpringWithDamping:0.1 initialSpringVelocity:10 options:UIViewAnimationOptionCurveLinear animations:^{
 9         CGPoint point = self.planeImageView.center;
10         point.y += 260;
11         self.planeImageView.center = point;
12         
13     } completion:^(BOOL finished) {
14         NSLog(@"动画结束");
15     }];
16 }