iOS如何在整个应用程序中更改导航项的“后退”按钮文本

Question

Background: I've setup my app using this link .

This is because my app needs to change the locale on-the-fly, instead of referring to the phone's language settings.

Have a look at this screenshot (Pardon me, I don't have enough reputation points to upload the photo here). Right now, the language being displayed is Chinese. However, the "Back" button on the top left is in the language set in the phone's settings.

What I know now:

I am able to set the text in the "Back" by setting it in the previous view ie the view before this one is pushed.

UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@"<MY CUSTOM BACK>" style:UIBarButtonItemStyleBordered target:nil action:nil];
[self.navigationItem setBackBarButtonItem:backItem];

This would work, I'll be able to set the text to what I want. But this means I would need to add this code snippet in almost every view controllers.

My question: I want to be able to set it in one location, and then it will apply throughout the app. I wonder if it is possible and if so, how can I achieve it?

Thanks in advance!

Answer 1

从实现了所有设计/通用方法的BaseViewController子类化ViewControllers，或将NavigationController子类化并在情节提要中更改类。

Answer 2

In general, I think this goes against Apple's Design Guidelines.

However, this post seems to provide a solution.

Answer 3

Modify global UI customiztions in your AppDelegate's didFinishLaounchingWithOptions method,

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 {
     [self customizeUI];
 }

.

 -(void)customizeUI
{
    [[UIBarButtonItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                                          [UIColor redColor],NSForegroundColorAttributeName,
                                                          [UIFont fontWithName:@"Arial" size:20.0],NSFontAttributeName,
                                                          nil]
                                                forState:UIControlStateNormal];
}

Answer 4

You can use Aspects like this:

[UIViewController aspect_hookSelector:@selector(viewDidLoad) withOptions:AspectPositionAfter usingBlock:^(id<AspectInfo> aspectInfo){
    UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStyleBordered target:nil action:nil];
    [((UIViewController*)aspectInfo.instance).navigationItem setBackBarButtonItem:backItem];
} error:NULL];