UITableView中默认重新加载后如何记住选择的行并维护它们?

问题描述

如何设置默认选中的行?我想选择一行，使用 indexpath.row 获取所选行的数量，然后重新加载表格并选择所选行.有人能帮助我吗?我可以在方法 -(IBAction) segmentedControlIndexChanged 中获取选定的行吗?不在 didSelectRowAtIndexPath 中?

How can I set a row selected by default? I want to select a row , take the number of selected row with indexpath.row and then reload the table and select the row what was selected. Can someone help me please? Can I get the selected row in a method -(IBAction) segmentedControlIndexChanged? Not in didSelectRowAtIndexPath?

这是我的代码，如果它可以帮助你理解

This is my code if it can help you to understand

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }
    //lbl1 = [[UILabel alloc]initWithFrame:CGRectMake(200, 10, 100, 20) ];

    // Configure the cell...
    NSString *depdateChoosed=[deparatureDates objectAtIndex:depSelectedIndice];
    NSString *comeateChoosed=[deparatureDates objectAtIndex:comSelectedIndice];
    NSString *choosedDate =[NSString stringWithFormat:@"%@%@",depdateChoosed, comeateChoosed];
    NSLog(@"date choisi %@ ",choosedDate);

    if(segment.selectedSegmentIndex==0)
    {
        cell.textLabel.text =[deparatureDates objectAtIndex:indexPath.row];        
    }
    else if(segment.selectedSegmentIndex==1) {
         //cell.textLabel.text =[goingBackDates objectAtIndex:indexPath.row];
        //cell.textLabel.text=[goingBackDates objectAtIndex:indexPath.row];
        cell.textLabel.text =[goingBackDates objectAtIndex:indexPath.row];
    }
    return cell;
}


- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSLog(@" champ séléctionner : %d ",indexPath.row);

    if(segment.selectedSegmentIndex==0)
    {
        depSelectedIndice=indexPath.row;  
    }
    else if(segment.selectedSegmentIndex==1) {
        comSelectedIndice=indexPath.row;
    }
    //[tableView reloadData];
}

-(IBAction) segmentedControlIndexChanged
{
    int i;
    switch (self.segment.selectedSegmentIndex) 
    {
        case 0:
            i=0;

            [tableView reloadData];
            break;
        case 1:
            i=1;
            NSLog(@"dexieme segment selectionner");
            [tableView reloadData];
        default:
            break;
    }
}

推荐答案

NSIndexPath *indexPath = [tableView indexPathForSelectedRow];

将为您提供当前所选行的 NSIndexPath.然后你可以做

will give you the NSIndexPath for the current selected row. You can then do

[tableView selectRowAtIndexPath:indexPath 
                       animated:NO 
                 scrollPosition:UITableViewScrollPositionMiddle];

稍后选择该行(并将其显示在屏幕中间).

to select that row (and show it in the middle of the screen) later.

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