我可以从 iOS 中通过 Tag 获取元素吗? [英] Can I get the element by Tag from iOS?

问题描述

我想取回一个按钮，我已经将标签分配给了那里，我该怎么做?

I want to get back a button, I've already assign the tag to there, how can I do so?

推荐答案

使用 viewWithTag 方法.例如如果您的按钮在控制器的视图中并且您的按钮标签为 100，则以下行将返回该按钮:

Use the viewWithTag method. e.g. if your button is in your controller's view and your button's tag is 100 the following line will return the button:

UIButton *button = (UIButton *)[self.view viewWithTag:100];

在 Swift 中获取带有特定标签的视图 -

Get view with particular tag in Swift -

let view = self.view.viewWithTag(100)

如果你想确保你有特定类型的视图，比如 UIButton，你应该检查类型:

If you want to make sure you have the specific type of view, say a UIButton, you should check the type:

if let button = self.view.viewWithTag(100) as? UIButton {
    //Your code
}

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