UIScrollView

创建scrollview

scrollView = UIScrollView()
scrollView.delegate = self
scrollView.frame = self.view.bounds
let imageView = UIImageView(image: UIImage(named: "0"))
scrollView.contentSize = imageView.bounds.size
scrollView.addSubview(imageView)
self.view.addSubview(scrollView)

设置属性

scrollView.minimumZoomScale = 0.5//最小比例
scrollView.maximumZoomScale = 2//最大比例
scrollView.scrollsToTop = true//点击状态栏回到顶端(默认是YES)
scrollView.alwaysBounceHorizontal = true//水平方向拖到末尾是否反弹
scrollView.alwaysBounceVertical = true//垂直方向反弹
scrollView.bounces = true//超出边界有反弹
scrollView.scrollEnabled = false//是否允许滚动

UIScrollViewDelegate 先遵守协议 UIScrollViewDelegate

滚动过程中一直执行该方法

func scrollViewDidScroll(scrollView: UIScrollView) {
    print("x:(scrollView.contentOffset.x)  y:(scrollView.contentOffset.y)")
}

拖拽完成后执行

func scrollViewDidEndDragging(scrollView: UIScrollView, willDecelerate decelerate: Bool) {
    print(scrollView.contentOffset)
}

手势放大缩小

func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? {
    for subView : AnyObject in scrollView.subviews{
        if subView.isKindOfClass(UIImageView){
            return subView as? UIView
        }
    }
    return nil
}

　　

来源: http://www.cnblogs.com/spaceID/p/4977449.html