将参数传递给选择器 [英] Pass an argument to selector

问题描述

我有一个UIButton在我的自定义单元格，我想触发一个动作，当用户按下该按钮，但我需要知道从哪一行按下UIButton。

I have a UIButton inside my custom cell and I want to trigger an action when the user presses that button BUT I need to know from which row the UIButton was pressed.

这是我的代码：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
    [self configureCell:cell atIndexPath:indexPath];
    return cell;

    ...

    [button addTarget:self action:@selector(buttonPressedAction:)forControlEvents:UIControlEventTouchUpInside];

}

- (void)buttonPressedAction:(UIButton *)button
{
    //int row = indexPath.row;
    //NSLog(@"ROW: %i",row);
}

如何将indexPath作为参数传递给我的选择器？

How do I pass the indexPath as argument to my selector?

推荐答案

您可以将按钮的标签属性设置为行号：

You can either set the tag property of the button to the row number:

button.tag = indexPath.row;

并使用

NSInteger row = button.tag;

或将索引路径对象本身设置为按钮的关联对象：

or set the index path object itself as an associated object to the button:

objc_setAssociatedObject(button, "IndexPath", indexPath);

和

NSIndexPath *ip = objc_getAssociatedObject(button, "IndexPath");

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