如何在滚动时停止缩放图像的边界？

Question

 UIScrollView1.contentSize=CGSizeMake(UIImageView1.frame.size.width, UIImageView1.frame.size.height);
 UIScrollView1.maximumZoomScale = 10.0;
 UIScrollView1.minimumZoomScale = 1.0;
 UIScrollView1.clipsToBounds = YES;
 UIScrollView1.userInteractionEnabled = YES;
 UIScrollView1.scrollEnabled = YES;
 UIScrollView1.pagingEnabled=YES;

 UIScrollView1.directionalLockEnabled = YES;
 UIScrollView1.delegate = self;
 [UIScrollView1 addSubview:UIImageView1];
 [self.view addSubview:UIScrollView1];

这是我使用scrollview拖动缩放图像的编码。虽然缩放时间图像移动速度很快。任何人都可以克服这个问题。

Thanks,

Senthilkumar