UIScrollView，通过淡出文本显示更多数据 [英] UIScrollView, showing that there is more data by fading out text

问题描述

当UIScrollView中有更多数据要滚动浏览时，是否有一种方法可以使顶部和底部的文本淡入淡出?为了获得这种效果，我是否必须在UIScrollView的UILabel上放置一些内容?

Is there a way to fade text at the bottom and top when there is more data to be scrolled through in the UIScrollView? Would I have to put something on top of the UILabel I have in the UIScrollView in order to get that effect?

推荐答案

您可以使用

You can use a CAGradientLayer on both top and bottom. You can add/remove this in the delegate method scrollViewDidScroll: based on the scroll view's contentOffset.

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