如何以编程方式刷新UIViewController? [英] How to refresh UIViewController programmatically?
本文介绍了如何以编程方式刷新UIViewController?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
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:
- 在你的viewcontroller中
- 直接在视图中
你需要调用函数setNeedsDisplay
you need to call the function setNeedsDisplay
- 如果你从viewController然后执行
[yourViewOutletVariable / viewParameter setNeedsDisplay];
- 如果你在视图中编写它然后
[self setNeedsDisplay];
- if you do it from the viewController then
[yourViewOutletVariable/viewParameter setNeedsDisplay];
- if you write it in the view itself then
[self setNeedsDisplay];
希望这会有所帮助
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