我可以通过iPhone SDK中的标签获取元素吗？ [英] Can I get the element by Tag from iPhone SDK?

问题描述

我想取回一个按钮，我已经将标签分配到那里，我该怎么办？谢谢。

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

推荐答案

使用 viewWithTag 方法。例如如果您的按钮位于控制器的视图中且按钮的标记为100，则以下行将返回按钮：

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];

编辑：

使用Swift中的特定标记获取视图 -

Get view with particular tag in Swift -

let view = self.view.viewWithTag(100)

如果您想确保具有特定类型的视图，例如UIButton，您应该检查类型：

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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