如何在Swift中从第一个ViewController隐藏导航栏？

如何快速隐藏第一个ViewController或特定ViewController的导航栏？

我在下面使用了以下代码 viewDidLoad()：

override func viewDidLoad() {
    super.viewDidLoad()
    self.navigationController?.isNavigationBarHidden = true
}

还有 viewWillAppear：

override func viewWillAppear(animated: Bool) {
    self.navigationController?.isNavigationBarHidden = true
}

两种方法都对所有ViewController隐藏导航控制器。

如果您知道所有其他视图都应显示该栏，则可以使用 viewWillDisappear将其再次设置为可见。

在Swift中：

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    navigationController?.setNavigationBarHidden(true, animated: animated)
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    navigationController?.setNavigationBarHidden(false, animated: animated)
}

迅捷3

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

    // Hide the navigation bar on the this view controller
    self.navigationController?.setNavigationBarHidden(true, animated: animated)
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)

    // Show the navigation bar on other view controllers
    self.navigationController?.setNavigationBarHidden(false, animated: animated)
}

您可以取消隐藏navigationController在viewWillDisappear

override func viewWillDisappear(animated: Bool)
{
    super.viewWillDisappear(animated)
    self.navigationController?.isNavigationBarHidden = false
}

迅捷3

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)

    self.navigationController?.setNavigationBarHidden(false, animated: animated)
}

您也可以为此创建扩展，这样您就可以重复使用扩展，而无需在每个视图控制器中一次又一次地实现。

import UIKit

extension UIViewController {
    func hideNavigationBar(animated: Bool){
        // Hide the navigation bar on the this view controller
        self.navigationController?.setNavigationBarHidden(true, animated: animated)

    }

    func showNavigationBar(animated: Bool) {
        // Show the navigation bar on other view controllers
        self.navigationController?.setNavigationBarHidden(false, animated: animated)
    }

}

因此，您可以使用以下扩展方法

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        hideNavigationBar(animated: animated)
    }

    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        showNavigationBar(animated: animated)
    }

在Swift 3中，您还可以使用isNavigationBarHidden属性来显示或隐藏导航栏

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    // Hide the navigation bar for current view controller
    self.navigationController?.isNavigationBarHidden = true;
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    // Show the navigation bar on other view controllers
   self.navigationController?.isNavigationBarHidden = false;
}

在Swift中显示导航栏的方法：

self.navigationController?.setNavigationBarHidden(false, animated: true)
self.navigationController?.navigationBar.isHidden = false
self.navigationController?.isNavigationBarHidden = false

在Swift中隐藏导航栏的方法：

self.navigationController?.setNavigationBarHidden(true, animated: true)
self.navigationController?.navigationBar.isHidden = true
self.navigationController?.isNavigationBarHidden = true

在IOS 8中做到

navigationController?.hidesBarsOnTap = true

但仅当它是UINavigationController的一部分时

当您想要它时将其设置为假

我使用上述方法的变体，并隔离了要嵌入到不同NavController中的我的应用程序部分。这样，我不必重置可见性。例如，在启动序列中非常有用。

 private func setupView() {
        view.backgroundColor = .white
        navigationController?.setNavigationBarHidden(true, animated: false)
    }

在视图中调用set hide方法将出现和消失。如果您不调用视图中的方法，则状态为false时将消失，它将在完整的导航层次结构中隐藏导航栏

 override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    self.navigationController?.setNavigationBarHidden(true, animated: true)
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    self.navigationController?.setNavigationBarHidden(false, animated:true)
}

您可以从窗口控制器（Swift3）进行操作

class WindowController: NSWindowController {

    override func windowDidLoad() {
        super.windowDidLoad()

        window?.titleVisibility = .hidden
    }
}