ios - 如何在 UITableViewCell 中实现带圆角的投影？

Question

我想在UITableViewCell中实现投影和圆角。

- (void)tableView:(UITableView *)tableView willDisplayCell:(MembershipCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{

    cell.contentView.backgroundColor = [UIColor clearColor];
    CGRect rect = cell.frame;
    UIView *whiteRoundedCornerView = [[UIView alloc] initWithFrame:CGRectMake(8,8,rect.size.width-8,rect.size.height)];
    whiteRoundedCornerView.backgroundColor = [UIColor whiteColor];
    whiteRoundedCornerView.layer.masksToBounds = NO;
    whiteRoundedCornerView.layer.cornerRadius = 3.0;
    whiteRoundedCornerView.layer.shadowOffset = CGSizeMake(0,0);
    whiteRoundedCornerView.layer.shadowOpacity = 0.75;
    [cell.contentView addSubview:whiteRoundedCornerView];
    [cell.contentView sendSubviewToBack:whiteRoundedCornerView];
}

我正在使用上面的代码，但它在单元格的顶部和左侧显示阴影。

Answer 1

那是因为你在右边和底部没有空间，你需要在右边和底部有一些空间来显示阴影。此外，您可以将 shadowRadius 添加到层中以控制阴影的半径。尝试以下

- (void)tableView:(UITableView *)tableView willDisplayCell:(MembershipCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{

    cell.contentView.backgroundColor = [UIColor clearColor];
    CGRect rect = cell.frame;

    UIView *whiteRoundedCornerView;

    if (![cell.contentView viewWithTag:SOME_TAG_VALUE]) {

        whiteRoundedCornerView = [[UIView alloc] initWithFrame:CGRectMake(8,8,rect.size.width-16,rect.size.height-16)];
        whiteRoundedCornerView.backgroundColor = [UIColor whiteColor];
        whiteRoundedCornerView.layer.masksToBounds = NO;
        whiteRoundedCornerView.layer.cornerRadius = 3.0;
        whiteRoundedCornerView.layer.shadowOffset = CGSizeMake(0,0);
        whiteRoundedCornerView.layer.shadowOpacity = 0.75;
        whiteRoundedCornerView.layer.shadowRadius = 1.0;
        whiteRoundedCornerView.tag = SOME_TAG_VALUE;
        [cell.contentView addSubview:whiteRoundedCornerView];
    }

    [cell.contentView sendSubviewToBack:whiteRoundedCornerView];
}