@property (nonatomic, strong) UIWindow *alertWindow;

- (void)p_setupAlertWindow {
    self.alertWindow = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    [self.alertWindow setWindowLevel:UIWindowLevelAlert];
    UIViewController* viewController = [[UIViewController alloc] init];
    [viewController.view addSubview:[PUT_ALERT_VIEW]];
    [self.myLL setHidden:NO];
    [self.alertWindow setRootViewController:viewController];
    [self.alertWindow setUserInteractionEnabled:NO];
}

// show alert window
[self.alertWindow setHidden:NO];

// hide alert window
[self.alertWindow setHidden:YES];