iOS點選按鈕隐藏狀态欄

@interface SecondViewController ()
@property (nonatomic, assign,getter=isHideStatus) BOOL hideStatus;
@end

@implementation SecondViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];

    UIButton *button  = [[UIButton  alloc] initWithFrame:CGRectMake(, , , )];
    button.center = self.view.center;
    button.backgroundColor = [UIColor blueColor];
    [button setTitle:@"隐藏導航欄" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(hideFrame) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];

    self.hideStatus = [UIApplication sharedApplication].statusBarHidden;

    // Do any additional setup after loading the view, typically from a nib.
}


- (void)hideFrame {

    [self setNeedsStatusBarAppearanceUpdate];//調用該方法後系統會調用prefersStatusBarHidden方法
    self.hideStatus = !self.hideStatus;

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