设置导航条和状态栏

//设置导航条的背景图片 (可以设置一张纯色的图片来做导航条的背景)
[self.navigationController.navigationBarsetBackgroundImage:[UIImage imageNamed:@"图片名称"]forBarMetrics:UIBarMetricsDefault];

// 设置导航条的文字颜色为白色
[self.navigationController.navigationBarsetTitleTextAttributes:@{

NSForegroundColorAttributeName : [UIColorwhiteColor]

}];

// 去掉导航条底部的线
[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];

[self.navigationController.navigationBar setShadowImage:[UIImage new]];


// 设置导航条不透明
self.navigationBar.translucent = NO;

// 隐藏导航条(无动画)
self.navigationController.navigationBarHidden = YES;
// 隐藏导航条(有动画)
[[self navigationController] setNavigationBarHidden:YES animated:YES];


// 设置状态栏的文字颜色为白色
// 先在info.plist文件中添加一个字段 View controller-based status bar appearance 设置为NO

[[UIApplicationsharedApplication] setStatusBarStyle:UIStatusBarStyleLightContentanimated:NO];

// 隐藏当前页状态栏
[[UIApplication sharedApplication] setStatusBarHidden:YES];

// 隐藏所有界面的状态栏
// 1.在info.plist里面添加一个字段 Status bar is initially hidden, 设置为YES.
// 2.在AppDelegate.m文件中的 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOption 方法中写入如下代码:
[[UIApplication sharedApplication]setStatusBarHidden:YES withAnimation:UIStatusBarAnimationFade];