//弹出提示
-(void)showHUD{
    
    self.HUD = [[MBProgressHUD alloc]initWithView:self.view];
    
    [self.view addSubview:self.HUD];
    self.HUD.mode = MBProgressHUDModeIndeterminate;
    
    self.HUD.yOffset = 70.0f;
    self.HUD.xOffset = 0.0f;
    
    [self.HUD showAnimated:YES whileExecutingBlock:^{
        sleep(3);
    } completionBlock:^{
        [self.HUD removeFromSuperview];
        self.HUD = nil;
    }];
    
    
}

@property(strong,nonatomic) MBProgressHUD* HUD;