在UICollectionView上面添加分割线

万能的百度，没有找到这个解决方法，我糅合了这个 点击打开链接 帖子的答案，

在函数

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath

里增加了以下代码：

    CGSize contentSize = self.clevVideo.contentSize;
    if(didAddSperateVerticalLine == NO) {
        UIView *verticalLine = [[UIView alloc]initWithFrame:CGRectMake(contentSize.width * 0.5 - 0.5, 0, 1, contentSize.height - 8)];
        verticalLine.backgroundColor = [UIColor lightGrayColor];//colorWithRed:225/225.0f green:227/225.0f blue:233/225.0f alpha:1.0];
        verticalLine.alpha = 0.35;
        [self.clevVideo addSubview:verticalLine];
        didAddSperateVerticalLine = YES;
    }
    
    UIView *horizontalLine = [[UIView alloc]initWithFrame:CGRectMake(0, (20 + cell.frame.size.height) * indexPath.row , contentSize.width, 1)];//每一个cell的framee是 17.00, 10.00, 160.00, 160.00  ,
    NSLog(@"%ld, =>  %.2f, %.2f, %.2f, %.2f, ", indexPath.row, horizontalLine.frame.origin.x, horizontalLine.frame.origin.y, horizontalLine.frame.size.width, horizontalLine.frame.size.height);
    horizontalLine.backgroundColor = [UIColor lightGrayColor];
    horizontalLine.alpha = 0.35;
    [self.clevVideo addSubview:horizontalLine];

    return cell;

}

效果如下：