CALayer创建和和如何隐藏隐式动画

//修改CALay属性会产生隐式动画

- (void)viewDidLoad {
    [super viewDidLoad];

    // 创建图层
    CALayer *layer = [CALayer layer];
    layer.backgroundColor = [UIColor blueColor].CGColor;
    // 设置frame
    layer.frame = CGRectMake(100, 100, 100, 100);
    // 添加到控制器view的图层上面
    [self.view.layer addSublayer:layer];
    self.layer = layer;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
//    self.layer.backgroundColor = [UIColor orangeColor].CGColor;

//    self.layer.position = CGPointMake(300, 300);
//

    // 开启事务
    [CATransaction begin];
    // 禁止隐式动画
    [CATransaction setDisableActions:YES];
    self.layer.bounds = CGRectMake(0, 0, 400, 400);
    // 提交事务
    [CATransaction commit];

}