如何重写self.navigationItem.backBarButtonItem操作? [英] How to override self.navigationItem.backBarButtonItem Action?

问题描述

我想覆盖self.navigationItem.backBarButtonItem的 target 和 action ，

我尝试过:

UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Back"
                                                                   style:UIBarButtonItemStyleBordered
                                                                  target:self
                                                                  action:@selector(backButtonOverrideAction:)];
[self.navigationItem setLeftBarButtonItem:backButton];

它正在工作，但我想使用默认箭头:

it is working but i want to use the default arrow:

我也尝试过:

UIBarButtonItem *backButton = self.navigationItem.backBarButtonItem;
[backButton setTarget:self];
[backButton setAction:@selector(backButtonOverrideAction:)];

但不幸的是，它无法正常工作.您是否知道如何执行此操作?

but unfortunately it's not working.. do you have any idea how to do this?

推荐答案

仍然，无法直接访问更改 target 和 >上的操作 .

STILL, No direct access for changing target and action on self.navigationItem.backBarButtonItem.

我最终使用了我尝试过的第一个……并获得了我的(自定义)图片.

I ended up using the first one i tried... and get my (custom) image..

UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"myImage.png"]
                                                               style:UIBarButtonItemStyleBordered
                                                              target:self
                                                              action:@selector(backButtonOverrideAction:)];
[self.navigationItem setLeftBarButtonItem:backButton];

同时...

//this two lines of code are still useless, i just feel sorry for them.. 
[self.navigationItem.backBarButtonItem setTarget:<#(id)#>];
[self.navigationItem.backBarButtonItem setAction:<#(SEL)#>];

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