手动调用didSelectRowatIndexPath [英] Manually call didSelectRowatIndexPath

问题描述

我试图以编程方式调用didSelectRowAtIndexPath，但遇到了麻烦。

I am trying to call didSelectRowAtIndexPath programmatically but am having trouble.

[self tableView:playListTbl didSelectRowAtIndexPath:indexPath];

给我以下错误：

使用未声明的标识符'indexPath';你是说'NSIndexPath'吗？

Use of undeclared identifier 'indexPath'; did you mean 'NSIndexPath'?

任何人都可以帮帮我吗？谢谢！

Can anybody help me out? Thanks!

编辑：从下面的回复中，听起来我正在以错误的方式进行此操作。按下按钮时，如何获取所选项目的文本（可以是多个选项）？我需要在专用于按下按钮的功能中执行此操作。

From the responses below it sounds like im going about this the wrong way. How can I get the text of the selected items when a button is pressed (can be multiple selections)? I need to do this in a function dedicated to the button press.

推荐答案

如果你避风港，你需要传递一个有效的参数在调用范围内声明 indexPath 然后你就会得到那个错误。尝试：

You need to pass a valid argument, if you haven't declared indexPath in the calling scope then you'll get that error. Try:

NSIndexPath *indexPath = [NSIndexPath indexPathForRow:ROW_YOU_WANT_TO_SELECT inSection:SECTION_YOU_WANT_TO_SELECT]
[self tableView:playListTbl didSelectRowAtIndexPath:indexPath];

其中 ROW_YOU_WANT ... 将是替换为您要选择的行和部分。

Where ROW_YOU_WANT... are to be replaced with the row and section you wish to select.

但是，您真的不应该直接调用它。将 tableView：didSelectRowAtIndexPath：中正在完成的工作提取到单独的方法中并直接调用它们。

However, you really shouldn't ever call this directly. Extract the work being done inside tableView:didSelectRowAtIndexPath: into separate methods and call those directly.

要解决更新的问题问题，您需要在 UITableView 上使用 indexPathsForSelectedRows 方法。想象一下，你正在从字符串数组中填充表格单元格文本，如下所示：

To address the updated question, you need to use the indexPathsForSelectedRows method on UITableView. Imagine you were populating the table cell text from an array of arrays of strings, something like this:

- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        UITableViewCell *cell = [tv dequeue...];
        NSArray *rowsForSection = self.sectionsArray[indexPath.section];
        NSString *textForRow = rowsForSection[indexPath.row];
        cell.textLabel.text = textForRow;
        return cell;
    }

然后，为了获得所有选定的文字，你想做点什么喜欢：

Then, to get all the selected text, you'd want to do something like:

NSArray *selectedIndexPaths = [self.tableView indexPathsForSelectedRows];
NSMutableArray *selectedTexts = [NSMutableArray array];
for (NSIndexPath *indexPath in selectedIndexPaths) {
    NSArray *section = self.sectionsArray[indexPath.section];
    NSString *text = section[indexPath.row];
    [selectedTexts addObject:text];
}

selectedTexts 会在该点包含所有选定的信息。希望这个例子有意义。

selectedTexts would at that point contain all selected information. Hopefully that example makes sense.

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