Question

How to customize the background/border colors of a grouped table view cell?

阅读本文后，我尝试使用此解决方案。这是我的代码，在tableViewDelegate方法中：

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
   CustomCellBackgroundView *customBackground = [CustomCellBackgroundView alloc];

    [customBackground setBorderColor:[UIColor blackColor]];
    [customBackground setFillColor:[UIColor redColor]];
    [customBackground setPosition:0]; //i'll deal with that later

    [cell setSelectedBackgroundView:customBackground];
    [customBackground release];


    UIImageView* selectedBackgroundCell = [[[UIImageView alloc] initWithFrame:CGRectNull] autorelease];
    [selectedBackgroundCell setImage:[UIImage imageNamed:@"cell_bg_50_hover.png"]];
    [customBackground drawRect:selectedBackgroundCell.frame];

    [cell setSelectedBackgroundView:selectedBackgroundCell];

    //standard background color
    [cell setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"cell_bg_50.png"]]];
}

但不幸的是，它没有改变任何东西。你知道我做错了吗？

Answer 1

我相信每当制作视图时，你应该为此指定一些框架。因此，请为自定义背景和背景指定框架CGRectZero ....

在我测试时，只为我工作。



    UIView *bkview = [[[UIView alloc] initWithFrame:CGRectZero] autorelease];

    bkview.backgroundColor = [UIColor redColor];

    cell.selectedBackgroundView = bkview;

UIView *bkview = [[[UIView alloc] initWithFrame:CGRectZero] autorelease]; bkview.backgroundColor = [UIColor redColor]; cell.selectedBackgroundView = bkview;

Answer 2

您发布customBackground，然后调用[customBackground drawRect：selectedBackgroundCell.frame];

很明显，在nil指针上调用函数不会做任何事情。

关于绘制细胞矩形的解决方案的光

2 个答案: