iPhone - 如何确定在自定义 UITableViewCell 中按下按钮的单元格

iPhone - How to determine in which cell a button was pressed in a custom UITableViewCell(iPhone - 如何确定在自定义 UITableViewCell 中按下按钮的单元格)

问题描述

我目前有一个 UITableView，其中填充了一个单独的 nib 中的自定义 UITableViewCell.在单元格中，有两个按钮连接到自定义单元格类中的操作.当我单击其中一个按钮时，我可以调用正确的方法，但我需要知道按钮被按下的是哪一行.每个按钮的标记属性为 0.我不需要知道整个单元格的时间被选中，只是在按下特定按钮时，所以我需要知道它是哪一行，这样我才能更新正确的对象.

I currently have a UITableView that is populated with a custom UITableViewCell that is in a separate nib. In the cell, there are two buttons that are wired to actions in the custom cell class. When I click one of the buttons, I can call the proper method, but I need to know which row the button was pressed in. The tag property for each button is coming as 0. I don't need to know when the entire cell is selected, just when a particular button is pressed, so I need to know which row it is so I can update the proper object.

推荐答案

更简单的解决方案是使用 (id)sender 定义按钮回调 并使用它来挖掘表格行索引.下面是一些示例代码:

Much easier solution is to define your button callback with (id)sender and use that to dig out the table row index. Here's some sample code:

- (IBAction)buttonWasPressed:(id)sender
{
    NSIndexPath *indexPath =
        [self.myTableView
         indexPathForCell:(UITableViewCell *)[[sender superview] superview]];
    NSUInteger row = indexPath.row;

    // Do something with row index
}

您很可能使用相同的行索引来创建/填充单元格，因此确定您的按钮现在应该做什么应该是微不足道的.无需玩标签并尽量保持它们井井有条！

Most likely you used that same row index to create/fill the cell, so it should be trivial to identify what your button should now do. No need to play with tags and try to keep them in order!

澄清:如果您当前使用-(IBAction)buttonWasPressed;只需将其重新定义为-(IBAction)buttonWasPressed:(id)sender; 额外的回调参数就在那里，不需要做任何额外的事情来获取它.还记得将您的按钮重新连接到 Interface Builder 中的新回调！

Clarification: if you currently use -(IBAction)buttonWasPressed; just redefine it as -(IBAction)buttonWasPressed:(id)sender; The additional callback argument is there, no need to do anything extra to get it. Also remember to reconnect your button to new callback in Interface Builder!

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