Swift 2.2如何更改标签栏控制器的背景颜色 [英] Swift 2.2 How to change background color of tab bar controller

问题描述

我一直在尝试更改标签栏的背景，并在ObjC中阅读了很多帖子，其中很多都很老。但我没有找到任何Swift，这就是我正在使用的。

I've been trying to change the background of the tab bar, and have read many posts here in ObjC, many of them quite old. But I didn't find any for Swift, which is what I'm using.

我终于想出了如何从代码中做到这一点，所以标签栏颜色可以随着每个主题颜色的变化而改变。以下是我使用的参考资料：

I finally figured out how to do it from code, so the tab bar colors can be changed with each theme color change. Here are the references that I used:

  override func viewWillAppear(animated: Bool) {
    // set tab bar background color, including the More tab
    self.tabBarController?.tabBar.backgroundColor = UIColor.blueColor()
  }

我将此代码放在视图控制器中，以便在应用启动时显示第一个选项卡，以便它首先运行。据我所知，即使我有8个标签并使用更多...标签，它也能正常工作。

I put this code in the view controller for the first tab that appears when the app starts up, so that it gets run "first." It works fine as far as I can tell, even when I have 8 tabs and use the More... tab.

我将相同的代码绑定到各种按钮标签，所以我可以在我的代码中的任何地方更改标签栏颜色。

And I bound the same code to buttons in various tabs, so I can change the tab bar color from anywhere in my code.

但我承认，作为一个新手，我不确定这是改变的最佳位置标签栏颜色。如果这是错误的地方，请更正我。

But I confess that as a newbie, I'm not sure that's the best location to change the tab bar color. If this is the wrong place, please correct me.

我在这里发布此代码，因为它可以节省我几个小时，我希望它可以拯救别人一些（快速）时间。

I post this code here since it would have saved me a few hours, and I hope that it can save someone else some (swift) time.

推荐答案

这是改变 UITabBar <的一种很好的方法/ code>。如果你想避免在嵌入 UITabBarController 内的每个viewController中设置颜色，你也可以创建一个 UITabBarController的子类并将其设置在那里。这种方式无论首先出现什么页面，都会设置颜色。

This is a fine way to change the color of a UITabBar. If you want to avoid setting the color in every viewController that is embedded inside of your UITabBarController, you could also create a subclass of UITabBarController and set it there. This way no matter what page comes up first, the color will be set.

创建的子类UITabBarController ，只需转到文件>新建>文件>可可触摸类...然后像在这张照片中设置您的文件

To create a subclass of UITabBarController, just go to file > new > file > cocoa touch class...Then setup your file like in this photo

现在在你的故事板中，在tabBarController上设置自定义类

Now in your storyboard, set the custom class on your tabBarController

最后，在你的文件中你创建了 MyTabBarController （或你称之为的任何东西）：

Finally, in your file you created MyTabBarController (or whatever you called it):

class MyTabBarController: UITabBarController {

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(animated)

    self.tabBar.barTintColor = .blueColor()
}
...

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