在“返回"旁边添加另一个按钮UINavigationBar 左侧的按钮 [英] Add another button next to the "back" button on the left of a UINavigationBar

问题描述

我已经尝试了几个小时，但我仍然无法解决它.当使用 UINavigationController 并在顶部推送一个新的视图控制器时，导航栏左侧有一个免费的返回"按钮.我想要旁边的另一个按钮(显示弹出菜单).我想知道这样做的正确方法是什么.或者我必须隐藏免费的后退按钮并自己制作一个?如果是这样的话，我也需要在按下自己的后退按钮时弹出当前视图控制器，对吧?

I've tried this for hours but I still cannot solve it. When using UINavigationController and push a new view controller on top, I got a free "back" button on the left of the navigation bar. I want another button just next to it (to show a popover menu). I wonder what is the correct way to do that. Or I have to hide the free back button and make the same one by myself? If that's the case, I also need to pop the current view controller when pressing my own back button, right?

感谢您的帮助.

推荐答案

正如 steipete 在对问题的评论中所说，这可能从 iOS 5 开始.您可以使用

As stated by steipete in the comment to the question, this is possible starting from iOS 5. You can use

self.navigationItem.leftItemsSupplementBackButton = YES;

然后您只需添加一个 UIBarButtonItem 作为 leftButton 即可在后退按钮之后获得第二个按钮

and then you just need to add an UIBarButtonItem as leftButton to get a second button after the back button

UIBarButtonItem *secondButton = [[UIBarButtonItem alloc] initWithTitle:@"Second" style:UIBarButtonItemStylePlain target:self action:@selector(yourAction)];
self.navigationItem.leftBarButtonItem = secondButton;

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