iPhone SDK : custom buttons in TableView

Question

我在表格 View 中使用自定义按钮，它对我很有用:

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

     UIImage *detailsButtonImage;
     UIButton *detailsButton;

     NSString *CellIdentifier = @"Cell";

     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
     if (cell == nil) {
            cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
     }

     //populate cells with array elements
     cell.textLabel.text = [itemsArray objectAtIndex:indexPath.row];

     //a custom button
     detailsButton = [UIButton buttonWithType:UIButtonTypeCustom];
     detailsButtonImage = [UIImage imageNamed:@"details.png"];
     [detailsButton setBackgroundImage:detailsButtonImage forState:UIControlStateNormal];
     detailsButton.frame = CGRectMake(275, 10, 20, 22);

      //which cell was tapped?
     [detailsButton setTag:[itemsArray objectAtIndex:indexPath.row]];
     [detailsButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside];
     [cell.contentView addSubview:detailsButton];
      return cell;
 }

//showing details of selected item
- (void) showDetails:(id)sender
{  
    AnotherViewController *anotherViewController = [[AnotherViewController alloc] init];
    anotherViewController.title = [sender tag];
    anotherViewController.itemDescription = [itemsDescriptions objectAtIndex:[itemsArray indexOfObjectIdenticalTo:[sender tag]]]; 

    [self.navigationController pushViewController:anotherViewController animated:YES];
    [anotherViewController release];
}

我很好奇除了设置标签之外是否还有其他方法可以将单元格标识符发送到 AnotherViewController。

Answer 1

看起来您希望 showDetails 了解哪个按钮按下了它。我认为你这样做的方式很好，但如果你愿意，你可以有一个功能

• (void) showDetails:(id)sender withObject:(id)object;

并使用按钮调用它，而不仅仅是 showDetails:(id)sender;我推断你的对象是你正在做的事情的字符串，所以它可能是

• (void) showDetails:(id)sender withString:(NSString *)string;

但说实话，你现在的做法很好，为什么要改变呢？