prefersStatusBarHidden状态栏控制

1.在plist中配置

    <key>UIViewControllerBasedStatusBarAppearance</key>
    <true/>

2.在需要控制的控制器写入这段代码

- (BOOL)prefersStatusBarHidden {
    return YES;
}

3.在UINavigationController中写入以下代码

- (BOOL)prefersStatusBarHidden{
    return self.topViewController.prefersStatusBarHidden;
}