如何以编程方式刷新UIViewController？ [英] How to refresh UIViewController programmatically?

问题描述

我有一个ViewController，用户在其中从UIScrollView中选择一张卡片（自定义UIButton）。我截获了触摸事件选择卡并识别它，然后将其从数据源中删除，但它仍然存在于UISubView中。我怎么摆脱它？刷新视图应该会从视图中删除它。我该怎么办？

I have a ViewController in which the user selects a card (a custom UIButton) out of a UIScrollView. I have intercepted the touch event selecting the card and identified it, and then removed it from the data source, but it still exists in the UISubView. How do I get rid of it? Refreshing the view should show it removed from the view. How do I do that?

推荐答案

你可以在两个地方之一做到：

you can do it in one of two places:

1. 在你的viewcontroller中


2. 直接在视图中

你需要调用函数setNeedsDisplay

you need to call the function setNeedsDisplay

1. 如果你从viewController然后执行 [yourViewOutletVariable / viewParameter setNeedsDisplay];


2. 如果你在视图中编写它然后 [self setNeedsDisplay];

1. if you do it from the viewController then [yourViewOutletVariable/viewParameter setNeedsDisplay];
2. if you write it in the view itself then [self setNeedsDisplay];

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