iOS7之後. 默認的返回按鈕字體顏色是藍色的, 顯示內如是父VC(上一級界面)的title
如果要做修改, 可以通過下面的辦法:

(1) 在plist裡面, 加上View controller-based status bar appearance, 並且設置為NO

(2) 在需要修改的那個界面. 加入如下代碼(加在viewDIdLoad即可)<喎?/kf/ware/vc/" target="_blank" class="keylink">vcD4NCjxwcmUgY2xhc3M9"brush:java;"> self.navigationController.navigationBar.barStyle = UIStatusBarStyleDefault; [self.navigationController.navigationBar setTintColor:[UIColor greenColor]];

或:

//Nav樣式
    application.statusBarStyle = UIStatusBarStyleLightContent;
    [UINavigationBar appearance].barTintColor =[UIColor colorWithRed:24/255.0 green:30/255.0 blue:43/255.0 alpha:1.0];
    [UINavigationBar appearance].tintColor = [UIColor whiteColor];
    NSDictionary *NavTextAttribute = @{
                                       //字體顏色
                                       NSForegroundColorAttributeName:[UIColor whiteColor],
                                       //字體大小
                                       NSFontAttributeName:[UIFont boldSystemFontOfSize:18]};
    [UINavigationBar appearance].titleTextAttributes = NavTextAttribute;

2.更改UINavgation的navigationItem返回ButtonItem文字

UIBarButtonItem *backItem = [[UIBarButtonItem alloc] init];
backItem.title = @"返回";
self.navigationItem.backBarButtonItem = backItem;