Iphone UIScrollview触摸开始、触摸移动、触摸取消操作

我在UIView中做了这个触摸动作， 在uiview中有两个或三个子视图v1、v2、v3。我使用下面的代码将图像i1、i2、i3放置在相应的视图中，如果我移动触摸，图像将移动到视图中的该点

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    if ([touch view] == v1)
    {
        CGPoint location = [touch locationInView:v1];
        i1.center = location;
    }
        else if([touch view] == v2)
    {
        CGPoint location = [touch locationInView:v2];
        i2.center = location;
    }
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    if ([touch view] == v1)
    {
        CGPoint location = [touch locationInView:v1];
        i1.center = location;
    }
        else if([touch view] == v2)
    {
        CGPoint location = [touch locationInView:v1];
        i2.center = location;
    }
}

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现在我必须对28幅图像的序列执行此操作，所以我选择了Uiscrollview，但我无法获得，请用代码清楚地解释我。非常感谢您的帮助。

您需要对UIScrollView进行子类化以获取UIScrollView的触摸事件。

如何对UIScrollView进行子类化请通过此链接进行解释