1、隐藏和显示导航栏
方法一：（简单粗暴）
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:YES];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
方法二：（使用代理）
//UINavigationControllerDelegate
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
BOOL isHiddenNavBar = [viewController isKindOfClass:[self class]];
[self.navigationController setNavigationBarHidden:isVC animated:YES];
}
2、自定义UINavigationController返回按钮
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
ViewController *vc = [ViewController new];
UINavigationController *navC = [[UINavigationController alloc] initWithRootViewController:vc];
UIBarButtonItem *backItem = [[UIBarButtonItem alloc] init];
backItem.title = @"返回";
vc.navigationItem.backBarButtonItem = backItem;
self.window.rootViewController = navC;
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
