在“后退”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，我在导航栏的左侧有一个免费的后退按钮。我想在它旁边的另一个按钮（显示一个弹出菜单）。我想知道这样做的正确方法是什么。或者我必须隐藏自由后退按钮并自己制作相同的按钮？如果是这种情况，我还需要在按下我自己的后退按钮时弹出当前视图控制器，对吗？

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在问题评论中所述，这可以从iOS 5开始。你可以使用

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

self.navigationItem.leftItemsSupplementBackButton = YES;

然后你只需要添加一个UIBarButtonItem作为leftButton来获取后退按钮后的第二个按钮

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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