ios - 修改导航 Controller 中所有 ViewController 的高度

Question

我有一个带有 4 个选项卡的选项卡栏 Controller 。每个选项卡都有一个导航 Controller 。

在某个时刻，一个 View (如播放器)会被添加到 TabBarController 的 tabBar 项目上方。

如何使所有 4 个导航 Controller 及其各自的 View 提高 40pt？

我尝试了很多方法，但都没有成功。

tabBar类:

UIView.animate(withDuration: Constants.TAB_BAR_ANIMATION_DURATION, animations: { [weak self] in
self?.view?.alpha = 1
self?.viewcontainer.frame = CGRect(x:0, y:UIScreen.main.bounds.height - (self?.tabbarHeight)! - Constants.viewHeight, width:UIScreen.main.bounds.width, height:Constants.viewHeight)
self?.view?.frame = CGRect(x:0, y:0, width:UIScreen.main.bounds.width, height:Constants.viewHeight)
    }){[weak self] _ in
       self?.viewcontainer.layoutSubviews()
       self?.childViewControllers.forEach({ (vc) in
       vc.navigationController?.view.frame = CGRect(x:0, y:0, width:UIScreen.main.bounds.width, height:UIScreen.main.bounds.height - 40)
       vc.navigationController?.view.layoutIfNeeded()
    })
}

最后一部分是问题所在。还尝试更改 View 的高度，但没有找到解决方案。

谢谢!

Answer 1

如果像这样创建 tabBarController 的自定义类，则可以完成此操作，但请记住，如果选项卡后面没有其他 ViewController，背景将为黑色

class CusTabViewController: UITabBarController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    override func viewDidAppear(_ animated: Bool) {

        UIView.animate(withDuration: 4 , animations: { [weak self] in

            self?.view.frame = CGRect(x:0, y:0, width:UIScreen.main.bounds.width, height:100 )


        }){[weak self] _ in

        }

    }

}

或者在 child 身上

class FirstViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    @IBAction func dd(_ sender: Any) {

        UIView.animate(withDuration: 4 , animations: { [weak self] in

            self?.view.frame = CGRect(x:0, y:0, width:UIScreen.main.bounds.width, height:(self?.view.frame.height)! - 200)


        }){[weak self] _ in

        }

    }

}