CoreAnimation动画（CALayer动画）

#pragma mark - CABasicAnimation动画
- (IBAction)basicAnimation:(UIButton *)sender {
    
    // 1.创建动画对象
    CABasicAnimation *basicAnimation = [CABasicAnimation animation];
    
    // 2.告诉layer层需要执行什么样的动画【后面设置的内容为CALayer的相关属性】
    basicAnimation.keyPath = @"position";
    
    // 3.告诉layer从哪里来，要到哪里去
    basicAnimation.fromValue = [NSValue valueWithCGPoint:CGPointMake(100, 100)];
    basicAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(300, 300)];
    
    // 如果要实现移动后不回到原来的位置
    basicAnimation.removedOnCompletion = NO;
    basicAnimation.fillMode = kCAFillModeForwards;  // 保存动画状态的内容
    
    // 4.设置动画持续的时长
    basicAnimation.duration = 6.0f;
    
    // 5.将要执行的动画添加到CALayer上
    [self.imgView.layer addAnimation:basicAnimation forKey:@"basic"];
    
    
    /*****************  翻转效果  *********************/
    CABasicAnimation *basicAnimation1 = [CABasicAnimation animation];
    basicAnimation1.keyPath = @"transform";
    
    // 设置的翻转到的地方
    basicAnimation1.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeRotation(M_PI_2, 0, 0, 1)];
    
    basicAnimation1.duration = 4.0f;
    [self.imgView.layer addAnimation:basicAnimation1 forKey:@"aaa"];
    
    
    // 根据key移除动画
    [self.imgView.layer removeAnimationForKey:@"basic"];
}

#pragma mark - CAKeyFrameAnimation动画
- (IBAction)CAKeyFrameAnimation:(UIButton *)sender {
    
    // 1.创建对象
    CAKeyframeAnimation *keyFrameAnimation = [CAKeyframeAnimation animation];
    
    // 2.设置动画轨迹
    keyFrameAnimation.keyPath = @"transform.rotation";
    
    // 3.设置旋转角度(弧度的计算公式：度数 / 180 * M_PI)
    keyFrameAnimation.values = @[@(-4 / 180.0 * M_PI), @(4 / 180.0 * M_PI), @(8 / 180.0 * M_PI)];
    
    // 4.设置时长
    keyFrameAnimation.duration = 3.0f;
    
    // 5.添加动画到layer层
    [self.imgView.layer addAnimation:keyFrameAnimation forKey:@"ccc"];
    
}

#pragma mark - CAAnimationGroup动画
- (IBAction)CAAnimationGroup:(UIButton *)sender {
    
    // 平移动画
    CABasicAnimation *basic1 = [CABasicAnimation animation];
    basic1.keyPath = @"transform.translation.y";
    basic1.toValue = @(400);
    
    // 翻转动画
    CABasicAnimation *basic2 = [CABasicAnimation animation];
    basic2.keyPath = @"transform.scale";
    basic2.toValue = @(0.5);
    
    // 旋转动画
    CABasicAnimation *basic3 = [CABasicAnimation animation];
    basic3.keyPath = @"transform.rotation";
    basic3.toValue = @(M_PI);
    
    
    // 创建管理各个动画的动画组
    CAAnimationGroup *group = [CAAnimationGroup animation];
    group.animations = @[basic1, basic2, basic3];
    group.duration = 5.0f;
    [self.imgView.layer addAnimation:group forKey:@"ddd"];
}

#pragma mark - CASpringAnimation动画
- (IBAction)CASpringAnimation:(UIButton *)sender {
    
    CASpringAnimation *springAnimation = [CASpringAnimation animation];
    springAnimation.keyPath = @"transform.scale";
    springAnimation.fromValue = @1;
    springAnimation.toValue = @0.25;
    springAnimation.duration = 3.0f;
    [self.imgView.layer addAnimation:springAnimation forKey:@"eee"];
}