为什么没有调用 -didDeselectRowAtIndexPath? [英] Why is -didDeselectRowAtIndexPath not being called?

问题描述

我创建了一个新项目(Xcode 4，Master-Detail 应用程序)只是为了看看我是否做错了什么，但我仍然遇到同样的问题.当用户取消选择一个单元格时，我想调用 -reloadData，所以这是我的代码:

I created a fresh project (Xcode 4, Master-Detail application) just to see if I'm doing something wrong, but I still have the same problem. I want to call -reloadData when the user deselects a cell, so this is my code:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    NSLog(@"%s", __PRETTY_FUNCTION__);
}

-(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath {
    NSLog(@"%s", __PRETTY_FUNCTION__);
    [tableView reloadData];
}

-(NSIndexPath *)tableView:(UITableView *)tableView willDeselectRowAtIndexPath:(NSIndexPath *)indexPath {
    NSLog(@"%s", __PRETTY_FUNCTION__);
    return indexPath;
}

问题是 didDeselectRowAtIndexPath 和 willDeselectRowAtIndexPath 似乎没有被调用.这是预期的行为吗?tableView:didDeselectRowAtIndexPath: state

The problem is that didDeselectRowAtIndexPath and willDeselectRowAtIndexPath don't seem to be called. Is this the expected behavior? The docs for tableView:didDeselectRowAtIndexPath: state

告诉委托指定的行现在已取消选择.

Tells the delegate that the specified row is now deselected.

所以我想它应该像我想的那样工作.

so I guess that it should work as I thought.

推荐答案

tableView:willDeselectRowAtIndexPath: 也说

此方法仅在存在选择时调用用户尝试选择不同的行.委托发送此方法对于先前选择的行.您可以使用UITableViewCellSelectionStyleNone 禁用单元格突出显示.

This method is only called if there is an existing selection when the user tries to select a different row. The delegate is sent this method for the previously selected row. You can use UITableViewCellSelectionStyleNone to disable the appearance of the cell highlight on touch-down.

当我使用 UITableViewCellSelectionStyleNone 时，它对我们不起作用.

It not worked for we when I used UITableViewCellSelectionStyleNone.

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