删除iOS UIBarButtonItem的标题文本 [英] Removing the title text of an iOS UIBarButtonItem

问题描述

我想要做的是从 UIBarButtonItem 的后退按钮中删除文本，只在导航栏上留下蓝色V形符号。请记住，我正在为iOS 7开发。我尝试了几种方法，包括但不限于：

What I wanted to do is to remove the text from the 'Back' button of a UIBarButtonItem, leaving only the blue chevron on the navigation bar. Keep in mind that I'm developing for iOS 7. I've tried several methods, including, but not limited to:

这是我没有的图像方法喜欢（图像看起来不合适）：<​​/ p>

This is the image method which I did not like (the image looked out of place):

UIBarButtonItem *barBtnItem = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"iOS7BackButton"] style:UIBarButtonItemStylePlain target:self action:@selector(goToPrevious:)];
self.navigationItem.leftBarButtonItem = barBtnItem;

我试过的另一种方法就是这个，它根本不起作用（没有显示任何内容）：

Another method I tried was this, which simply did not work (nothing was displayed):

UIBarButtonItem *barBtn = [[UIBarButtonItem alloc]init];
barBtn.title=@"";
self.navigationItem.leftBarButtonItem=barBtn;

我想要实现的是iOS 7音乐应用程序中的后退按钮，仅限于有一个单一的雪佛龙。

What I wanted to achieve is something like the back buttons found in the iOS 7 Music app, which only featured a single chevron.

谢谢。

推荐答案

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

然后你可以删除后退按钮项目标题。

Then you can remove the back button item title.

如果您使用Storyboard，则可以使用空格设置导航属性检查器后退按钮。

If you use Storyboard, you can set navigation attributes inspector Back Button with space.

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