如何在UITableViewCell中实现带圆角的阴影？

Question

我想实现投影阴影和圆角在UITableViewCell。

- (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]; 
} 

我使用上面的代码，但它显示在单元格的顶部和左侧的阴影。

Answer 1

这是因为你没有在右侧和底部有空间，你需要在右侧和底部留出一些空间以显示阴影。此外，您可以将shadowRadius添加到用于控制阴影半径的图层。尝试以下内容

- (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]; 
}