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Question

我已经从ViewController1到ViewController2实现了navigationController。我在ViewController2的NavigationBar的 Back BarButton 中得到了ViewController1的一小部分。

当我在ViewController2中更改 Back BarButton 的tittle时，ViewController1中的Tittle会发生变化。？

self.navigationController.navigationBar.topItem.title = @"";
self.navigationController.navigationBar.backItem.title = @"";

如何在不改变ViewController1的Tittle的情况下做到这一点

Answer 1

您应该创建自定义UIBarButtonItem。

self.navigationItem.backBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"Your Title" style:UIBarButtonItemStylePlain target:self action:YOUR_SELECTOR] autorelease];

Answer 2

在ViewController1中

-(void)viewWillAppear:(BOOL)animated {
       [super viewWillAppear:animated];
       self.navigationItem.title = @"someTitle1";
}

并在ViewController2中

-(void)viewWillAppear:(BOOL)animated {
       [super viewWillAppear:animated];
       self.navigationItem.title = @"someTitle2";
       self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]
       initWithImage:[UIImage imageNamed:@"BACK_BUTTON_IMG.png"] style:UIBarButtonItemStylePlain 
       target:self action:@selector(YOUR_SELECTOR_METHOD)];
    }