UITabBarViewController的自定义TabBar布局 [英] Custom TabBar layout for UITabBarViewController

问题描述

请参阅此答案.

我正在尝试做同样的事情，但是我想在Tab Bar应用程序中执行此操作，在该应用程序的所有场景中，正在播放"栏都位于Tab Bar上方.

I am trying to do the same thing, however I want to do this in a Tab Bar App where the Now Playing bar is above the Tab Bar in all the scenes of the app.

更新:

我想在屏幕底部(标签栏上方)和不同标签的内容视图下方(而不是它们上方)有一个视图.另外，我希望能够在某个时候删除此视图，以使主视图占据整个屏幕.

I want to have a view at the bottom of the screen (above the tab bar) and under the content views of the different tabs (not above them). In addition, I want to have the ability to remove this view at a certain point making the main view take the whole screen.

我可以使用提及的答案，通过以编程方式更改nowPlaying视图的约束来实现此目的.

I can do this using the mentioned Answer by changing the constraints of the nowPlaying view programmatically.

推荐答案

使用UITabBarViewController子类是可能的:

Using UITabBarViewController subclass it is possible:

例如:

class DashBoardViewController: UITabBarController {

    let nowPlayingBar:UIView = {
        let view = UIView(frame: .zero)
        view.backgroundColor = .blue
        return view
    }()

    override func viewDidLoad() {
        super.viewDidLoad()
        initView()
    }

    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        nowPlayingBar.frame = tabBar.frame
    }

    override func viewDidAppear(_ animated: Bool) {
        var newSafeArea = UIEdgeInsets()

        // Adjust the safe area to accommodate
        //  the height of the bottom views.
        newSafeArea.bottom += nowPlayingBar.bounds.size.height

        // Adjust the safe area insets of the
        //  embedded child view controller.
        self.childViewControllers.forEach({$0.additionalSafeAreaInsets = newSafeArea})
    }

    private func initView() {
        nowPlayingBar.frame = tabBar.frame
        view.addSubview(nowPlayingBar)
    }
}

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