ios7设置NavigationBar的背景色

ios7设置导航栏背景色的方法，与ios6不同了：

UIColor *color = [UIColor colorWithRed:107/255.0f green:211/255.0f blue:217/255.0f alpha:1.0f];
[[UINavigationBar appearance] setBarTintColor:color];

设置status bar的风格：

[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];

设置导航栏的字体颜色和图标颜色：

[[UINavigationBar appearance] setTintColor:[UIColor whiteColor]];
[[UINavigationBar appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor whiteColor]}];

上述代码都是写在

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

方法里