iOS-导航栏和状态栏的显示与隐藏

1.导航栏的显示与隐藏：

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    self.navigationController.navigationBarHidden = YES;
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear: animated];
    self.navigationController.navigationBarHidden = NO;
}

2.状态栏的显示与隐藏：

实现之前需要在Info.plist配置：

• Status bar is initially hidden 设为 YES
• View controller-based status bar appearance 设为 NO
  这样才会起作用。

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    [UIApplication sharedApplication].statusBarHidden = YES;
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear: animated];
    [UIApplication sharedApplication].statusBarHidden = NO;
}