以编程方式更改导航标题 | 以编程方式更改导航标题

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问题描述

我有一个带标题的导航栏.当我双击文本重命名它时，它实际上说它是一个导航项，所以可能是这样.

I have a navigation bar with a title.When I double click the text to rename it, it actually says it's a navigation item, so it might be that.

我正在尝试使用代码更改文本，例如:

I'm trying to change the text using code, like:

declare navigation bar as navagationbar here
button stuff {
    navigationbar.text = "title"
}

这显然不是我的代码，只是展示了它是如何工作的.

That's not my code obviously, just showing how it would work.

所以每当我按下按钮时，我都希望标题改变.

So whenever I press the button, I want the title to change.

推荐答案

您可以通过更改正在显示的视图控制器的标题:

viewController.title = "some title"

通常这是在视图控制器上加载视图时完成的:

Normally this is done in view did load on the view controller:

override func viewDidLoad() {
    super.viewDidLoad()
    self.title = "some title"
}

但是，这仅在您将视图控制器嵌入 UINavigationController 时才有效.我强烈建议您这样做，而不是自己创建导航栏.如果你坚持自己创建导航栏，你可以通过以下方式更改标题:

However, this only works if you have your view controller embedded in a UINavigationController. I highly recommend doing this instead of creating a navigation bar yourself. If you insist on creating a navigation bar yourself, you can change the title by doing:

navigationBar.topItem.title = "some title"

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