- (BOOL)prefersStatusBarHidden
{

    return YES;//隱藏為YES，顯示為NO
}

- (void)tapClick:(UITapGestureRecognizer *)sender {
    [self.imageView1 removeFromSuperview];
    [self.backgroundView removeFromSuperview];
}

//imageView1是二維碼圖片
-(void)downBtnClick{
    UIView *backgroundView = [[UIView alloc] init];
    self.backgroundView 
 
= backgroundView;
    backgroundView.frame = CGRectMake(0, 0,kScreenWidth,kSCreenHeight);
    backgroundView.backgroundColor = [UIColor colorWithRed:(40/255.0f) green:(40/255.0f) blue:(40/255.0f) alpha:1.0f];
    backgroundView.alpha = 0.7;
    backgroundView.userInteractionEnabled = YES;
    UITapGestureRecognizer 
 
*tap3 =
    [[UITapGestureRecognizer alloc] initWithTarget:self
                                            action:@selector(tapClick:)];
    tap3.numberOfTapsRequired = 1;     // 點幾下
    tap3.numberOfTouchesRequired = 1;  // 幾根手指
    // 2.對某一個需要添加手勢的view 添加手勢
    [backgroundView addGestureRecognizer:tap3];
    [self.window addSubview:backgroundView];
    [self.window addSubview:self.imageView1];
}
 

隱藏電池欄，遮罩層