使用自定义后退按钮后导航标题消失 [英] Navigation title disappears after use of custom back button

问题描述

我有 3 页

• 第 1 页:菜单
• 第 2 页:菜单 > 导航控制器 > 地图列表视图
• 第 3 页:菜单 > 导航控制器 > 地图

可以在第 2 页和第 3 页之间切换，但是当您单击返回"时，它始终会转到第 1 页，而我使用自定义后退按钮进行了此操作.

It's possible to switch between page 2 and 3 but when you click "Back" it always goes to page 1 and I did this using a custom back button.

使用自定义后退按钮后出现以下问题:当我从菜单页面(第 1 页)转到第 2 页或第 3 页时，导航标题出现，并在不到一秒钟的时间内消失.这怎么可能?

After having used the custom back button once the following problem appears: When I go to page 2 or 3 from the Menu page (Page 1) the navigation title appears and in less than a second it disappears. How is this possible?

这些是我正在使用的功能:

These are the functions I am using:

private func hideAndAddNewBackButton(){
    if backToRoot{
        self.navigationItem.hidesBackButton = true
        let newBackButton = UIBarButtonItem(title: "Back", style: UIBarButtonItemStyle.Plain, target: self, action: "back:")
        self.navigationItem.leftBarButtonItem = newBackButton;
        self.title = "Locaties"
    }
}

func back(sender: UIBarButtonItem) {
    if let viewController2 = storyboard!.instantiateViewControllerWithIdentifier("ViewController2") as? ViewController2{
        self.navigationController?.pushViewController(viewController2, animated: true);
    }
}

func needBackToRoot(){
    backToRoot = true;
}

这是在我的 viewDidLoad() 中:

And this is in my viewDidLoad():

var backToRoot:Bool = false;

override func viewDidLoad() {
    super.viewDidLoad()
    self.hideAndAddNewBackButton();
}

我的开关按钮:

@IBAction func showLijst(sender: AnyObject) {
    if let viewController3 = storyboard!.instantiateViewControllerWithIdentifier("Lijst") as? KaartListview{
        viewController3.needBackToRoot();
        self.navigationController?.pushViewController(viewController3, animated: true);
    }
}

推荐答案

就我而言，问题是在推送控制器中创建自定义后退按钮和设置self.navigationController?.navigationBar.topItem?.title = ""我的解决方案是:

In my case problem was creating custom back button and setting in pushed controller self.navigationController?.navigationBar.topItem?.title = "" My solutions is :

override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        navigationController?.isNavigationBarHidden = false
          self.navigationController?.navigationBar.topItem?.title = "SomeTitle"

    }

这篇关于使用自定义后退按钮后导航标题消失的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！