如何在Swift的第一个ViewController中隐藏导航栏？

Question

如何在第一个ViewController或swift中的特定ViewController中隐藏导航栏？

我使用以下代码viewDidLoad():

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

还有viewWillAppear:

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

这两种方法都隐藏了所有ViewControllers的导航控制器.

Answer 1

如果您知道所有其他视图都应该显示该栏,则可以使用viewWillDisappear它将其设置为再次可见.

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)
}

Answer 2

斯威夫特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)
}

Answer 3

您可以取消隐藏navigationController在viewWillDisappear

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

斯威夫特3

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

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

Answer 4

您还可以为此创建扩展,这样您就可以重复使用扩展,而无需在每个视图控制器中反复执行此扩展.

import UIKit

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

    }

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

}

因此,您可以使用如下的扩展方法

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

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

Answer 5

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;
}

Answer 6

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

Answer 7

想要隐藏第一个 ViewController 上的导航栏

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

想要在第二个 ViewController 上显示导航栏

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