如何在UITableViewCell中實現帶圓角的陰影？

Question

我想實現投影陰影和圓角在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]; 
} 

我使用上面的代碼，但它顯示在單元格的頂部和左側的陰影。

Answer 1

這是因爲你沒有在右側和底部有空間，你需要在右側和底部留出一些空間以顯示陰影。此外，您可以將shadowRadius添加到用於控制陰影半徑的圖層。嘗試以下內容

- (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]; 
}