如何删除所有导航栏后退按钮标题 [英] How to remove all navigationbar back button title

问题描述

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

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.

如果我在 prepareForSegue中添加一些代码功能，这将是一个麻烦。

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

有没有更好的方法来实现这个目标？

Any better way to achieve this？

推荐答案

如果你想要后退箭头，那么下面的代码将 AppDelegate 文件放入 didFinishLaunchingWithOptions 方法。

If you want back arrow so following code put into AppDelegate file into didFinishLaunchingWithOptions method.

对于Objective-C

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

对于Swift

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

下面给出另一个选项。

In 目标C

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

在 Swift

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

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：

    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)

使用抵消

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

所以可能你的问题已经解决了。

So may be your problem has been solve.

快乐编码。

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