Question

在didSelectRowAtIndexPath中，indexPath.row在选择单元格时显示正确的索引。但是在准备segue时，它始终为0，它始终将第一个对象发送到我的detailView中。为什么prepareForSegue indexPath与didSelectRowAtIndexPath不相同？

  - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    //NSLog(@"%i",indexPath.row);
    [self performSegueWithIdentifier:@"showDetailSegue" sender:tableView.indexPathForSelectedRow];
}

 -(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if([segue.identifier isEqualToString:@"showDetailSegue"])
    {

        UITableViewCell *cell = (UITableViewCell*) sender;
        NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];
        NSString *thisFName = [[_resultsArray objectAtIndex:indexPath.row] valueForKey:@"firstName"];
        //NSLog(@"%i",indexPath.row);
        NSString *thisLName = [[_resultsArray objectAtIndex:indexPath.row] valueForKey:@"lastName"];
        //NSString *fullName = [NSString stringWithFormat:@"%@ %@",thisFName,thisLName];
        NSString *thisPhone = [[_resultsArray objectAtIndex:indexPath.row] valueForKey:@"phone"];
        //NSString *thisLName = [[_resultsArray objectAtIndex:indexPath.row] valueForKey:@"lastName"];
        NSString *thisEmail = [[_resultsArray objectAtIndex:indexPath.row] valueForKey:@"email"];

        JCDetailViewController *controller = (JCDetailViewController *)segue.destinationViewController;
        controller.firstName = thisFName;
        controller.lastName = thisLName;
        controller.phoneString = thisPhone;
        controller.emailString = thisEmail;
        NSLog(@"%@",thisFName);


    }
}

Answer 1

Apple生产的所有标准代码都使用以下内容：

NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];

在prepareForSegue:sender:内。

在您的方法中，您希望该单元格是prepareFoeSegue:中的发件人，但您发送此单元格的索引路径

[self performSegueWithIdentifier:@"showDetailSegue" sender:tableView.indexPathForSelectedRow];

因此，您应该可以使用prepareForSegue:中的路径

[[self fetchedResultsController] objectAtIndexPath:sender];

Answer 2

您的代码不正确。当您致电performSegueWithIdentifier时，您正在为NSIndexPath *参数传递sender。但随后在prepareForSegue中，您sender投了UITableViewCell *。

如果您希望prepareForSegue中的单元格传递performSegueWithIdentifier中的单元格;否则，将sender投射到NSIndexPath *。

indexPath.row不一致

2 个答案: