ios 如何删除所有导航栏后退按钮标题

How to remove all navigationbar back button title

提问by jansma

When I push a UIViewController, it has some title in back button at new UIViewController, if the title has a lot of text, It does not look good in iPhone 4s So I want to remove it.

当我按下 a 时UIViewController，它在 new 的后退按钮中有一些标题UIViewController，如果标题有很多文字，它在 iPhone 4s 中看起来不太好所以我想删除它。

If I add some code in prepareForSeguefunction, it is going to be a trouble.

如果我在prepareForSegue函数中添加一些代码，那就麻烦了。

Any better way to achieve this？

有没有更好的方法来实现这一目标？

回答by Nimit Parekh

If you want back arrow so following code put into AppDelegatefile into didFinishLaunchingWithOptionsmethod.

如果您想要后退箭头，则将以下代码放入AppDelegate文件中的didFinishLaunchingWithOptions方法。

For Objective-C

For Objective-C

 [[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60) forBarMetrics:UIBarMetricsDefault];

For Swift

For Swift

let BarButtonItemAppearance = UIBarButtonItem.appearance()
BarButtonItemAppearance.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.clear], for: .normal)

Another option give below.

下面给出另一种选择。

In Objective C

在 Objective C

self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];

In Swift

在 Swift

self.navigationItem.backBarButtonItem = UIBarButtonItem(title:"", style:.plain, target:nil, action:nil)

UPDATE :

更新 ：

    let BarButtonItemAppearance = UIBarButtonItem.appearance()

    let attributes: [NSAttributedStringKey: Any] = [
    BarButtonItemAppearance.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.clear], for: .normal)
            NSAttributedStringKey.font: UIFont.systemFont(ofSize: 0.1),
            NSAttributedStringKey.foregroundColor: UIColor.clear]

    BarButtonItemAppearance.setTitleTextAttributes(attributes, for: .normal)
    BarButtonItemAppearance.setTitleTextAttributes(attributes, for: .highlighted)

UPDATE SWIFT 4.1 :

更新 SWIFT 4.1：

    let attributes = [NSAttributedStringKey.font:  UIFont(name: "Helvetica-Bold", size: 0.1)!, NSAttributedStringKey.foregroundColor: UIColor.clear]

    BarButtonItemAppearance.setTitleTextAttributes(attributes, for: .normal)
    BarButtonItemAppearance.setTitleTextAttributes(attributes, for: .highlighted)

Using Offset

使用偏移

UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffsetMake(-1000, 0), for:UIBarMetrics.default)

So may be your problem has been solve.

所以可能你的问题已经解决了。

Happy coding.

快乐编码。

回答by Mahesh Babu

Work's like charm on Swift 3

在 Swift 3 上工作就像魅力一样

self.navigationController?.navigationBar.topItem?.title = " "

回答by Karthickkck

I'm using this line of code in AppDelegatefile into didFinishLaunchingWithOptionsmethod to remove the backbutton title.

我在AppDelegatefile intodidFinishLaunchingWithOptions方法中使用这行代码来删除 backbutton title。

Swift 2.x

斯威夫特 2.x

let barAppearace = UIBarButtonItem.appearance()
barAppearace.setBackButtonTitlePositionAdjustment(UIOffsetMake(0, -60), forBarMetrics:UIBarMetrics.Default)

Swift 3.x

斯威夫特 3.x

UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffsetMake(0, -60), for:UIBarMetrics.default)

Swift 4.x

斯威夫特 4.x

UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.clear], for: .normal)
    UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.clear], for: UIControlState.highlighted)

回答by Pravin Kamble

Just need go to your Parent ViewControllerfrom where your other ViewControllers are dependent.

只需要从其他 ViewController 依赖的地方转到您的父 ViewController。

override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(true)
navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .Plain, target: nil, action: nil)}

回答by Vivek

Just copy this code in didFinishLaunchingWithOptions launchOptions

只需复制此代码 didFinishLaunchingWithOptions launchOptions

Swift 5

斯威夫特 5

UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffset(horizontal: -1000.0, vertical: 0.0), for: .default)

Swift 4

斯威夫特 4

UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffsetMake(-1000.0, 0.0), for: .default)

回答by oscar castellon

it is simple. put a space in the title of the back button and ready. Remember that it has to be in the previous view where you want to remove the text.

很简单。在后退按钮的标题中放置一个空格并准备好。请记住，它必须在要删除文本的上一个视图中。

回答by Anit Kumar

You can use xcode 8 and swift 3.0

您可以使用 xcode 8 和 swift 3.0

self.navigationController?.navigationBar.backItem?.title = " "

回答by Kiran jadhav

let barAppearace = UIBarButtonItem.appearance()
barAppearace.setBackButtonTitlePositionAdjustment(UIOffsetMake(0, -60), for:UIBarMetrics.default)

used this line of code in swift 3.0

在 swift 3.0 中使用了这行代码

回答by Connor

You could create a subclass for all UIViewControllers you want this behavior for, and in the subclass's viewDidLoad:

您可以为所有UIViewController想要这种行为的 s创建一个子类，并在子类的 s 中viewDidLoad：

override func viewDidLoad() {
    super.viewDidLoad()
    self.navigationItem.backBarButtonItem = UIBarButtonItem(
        title: "", style: .plain, target: nil, action: nil)
}

This way, you can choose which controllers you want the behavior for, without duplicating code. I prefer my controllers to just say "Back", rather than the title of the previous controller, so I set that title here.

通过这种方式，您可以选择想要行为的控制器，而无需重复代码。我更喜欢我的控制器只说“返回”，而不是前一个控制器的标题，所以我在这里设置了这个标题。

回答by Harry Bloom

Taking inspiration from rordulu'sanswer here, I ended up creating a custom UINavigationController and UINavigation bar which seems to handle all cases of this tricky problem.

从rordulu'sanswer here 中获得灵感，我最终创建了一个自定义 UINavigationController 和 UINavigation 栏，它似乎可以处理这个棘手问题的所有情况。

1) Initialise new UINavigationControllerwith your custom UINavigationBar:

1）UINavigationController用您的自定义初始化 new UINavigationBar：

class CustomNavigationController: UINavigationController {

    convenience init() {
        self.init(navigationBarClass: CustomNavigationBar.self, toolbarClass: nil)
    }
}

2) Set the backItem.titleproperty of the navigation bar to an empty string, every time the view lays itself out

2) 将backItem.title导航栏的属性设置为空字符串，每次视图布局时

class CustomNavigationBar: UINavigationBar {

    override func layoutSubviews() {
        backItem?.title = ""
        super.layoutSubviews()
    }
}

Now every time you use this navigation controller and bar combination, it will never have back button text!

现在每次使用这个导航控制器和栏组合时，它永远不会有后退按钮文本！

Note: this should work fine if using storyboards also, just ensure to drop the custom navigation bar component into the view

注意：如果也使用故事板，这应该可以正常工作，只需确保将自定义导航栏组件放入视图中