实现pull以刷新视图功能 [英] Implementing pull to refresh view feature

问题描述

我们可以在自定义视图控制器上实现pull-refresh功能吗？我的视图控制器不是一个表视图控制器，我想刷新这个视图拉下屏幕。

Can we implement pull to refresh feature on a custom view controller?. My view controller is not a table view controller and I want to refresh this view on pulling the screen down. How can I implement this feature?

推荐答案

简而言之，您需要执行以下操作：

In short, you need to do the following:

1. 将您的视图嵌入 UIScrollView 。


2. 将您的控制器设置为


3. 在滚动视图中添加Pull To Refresh子视图，使其框架离屏幕顶部较远。 cfrectake（0，-30，320，30）。


4. 实施<$ c $


5. 实施 -scrollViewDidEndDragging：willDecelerate： 以在拖动结束时检查 scrollView.contentOffset 。如果超过您的刷新阈值，请刷新。

1. Embed your view in a UIScrollView.
2. Set your controller as the delegate of the scroll view.
3. Add a "Pull To Refresh" subview to the scroll view such that its frame is off the top of the screen. Something like CGRectMake(0, -30, 320, 30) for a 30pt-tall indicator view.
4. Implement –scrollViewDidScroll: to update your "Pull to Refresh" view as the user is dragging.
5. Implement –scrollViewDidEndDragging:willDecelerate: to check scrollView.contentOffset when the dragging ends. If it's beyond your threshold for refreshing, then do the refresh.

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