移动炉管时禁用动画

下面的代码将动画化运动,即使我没有使用 beginAnimations:context . 我怎样才能让它在没有动画的情况下移动?这是一个新的iPhone视图项目,这些是对它的唯一更新。

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];

    sublayer = [CALayer new];
    sublayer.backgroundColor = [[UIColor redColor] CGColor];
    sublayer.frame = CGRectMake(0, 0, 100, 100);

    [self.view.layer addSublayer:sublayer];
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    sublayer.position = [[touches anyObject] locationInView:self.view];
}