ios - 在 UItableviewcell 中创建标签

Question

我想问我想在 Uitableview 中以编程方式创建标签，但是在从 json 例如加载数据之后。我的数据库中有 25 条记录，我将像这样返回

  -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [[[[FBModelManager sharedModelManager] getModelDictionary:kModelTransporterActivities] objectForKey:[NSString stringWithFormat:@"%d",[[FBUserManager sharedUserManager] userId]]] count];

   // return 5;
}

表格 View 单元格是这样填充的:

  -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSUInteger x=[[[[FBModelManager sharedModelManager] getModelDictionary:kModelTransporterActivities] objectForKey:[NSString stringWithFormat:@"%d",[[FBUserManager sharedUserManager] userId]]] count];

    static NSString *tableviewidentifier = @"InboxIdentifier";
    UITableViewCell *cell= [tableView dequeueReusableCellWithIdentifier:tableviewidentifier];
    if(cell==nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:tableviewidentifier];
//        UIButton * newAction = [UIButton buttonWithType:UIButtonTypeCustom];
//        newAction.frame = CGRectMake(250, 10, 30, 30);
//        [newAction addTarget:self action:@selector(loadMoreRecords:) forControlEvents:UIControlEventTouchUpInside];
//        [cell.contentView addSubview:newAction];



    }
     FBTransporterActivityModel *activityModel = [[[[FBModelManager sharedModelManager] getModelDictionary:kModelTransporterActivities] objectForKey:[NSString stringWithFormat:@"%d",[[FBUserManager sharedUserManager] userId]]] objectAtIndex:(int)indexPath.row];

    if(activityModel)
    {
        [cell.textLabel setText:activityModel.userName];


    }
    else
        [cell.textLabel setText:@"saba"];


    if(indexPath.row == [self tableView:tableView numberOfRowsInSection:indexPath.section] - 1){
        [[cell textLabel] setText:@"Load more records"];
    }

   // cell.textLabel.text=@"saba";



    return cell;


}

我想添加一个名为“加载更多记录”的标签或按钮，我可以在上面再次发送服务器调用.. 怎么做？？？提前致谢

Answer 1

首先你的-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection 实现应该返回count + 1

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    //perhaps should be cached for more performace
    return [[[[FBModelManager sharedModelManager] getModelDictionary:kModelTransporterActivities] objectForKey:[NSString stringWithFormat:@"%d",[[FBUserManager sharedUserManager] userId]]] count] + 1;
}

然后在您的 -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath 实现中，您可以检测最后一个单元格并以这种方式设置标签:

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

    static NSString *tableviewidentifier = @"InboxIdentifier";
    UITableViewCell *cell= [tableView dequeueReusableCellWithIdentifier:tableviewidentifier];
    if(cell==nil){
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:tableviewidentifier];
    }

    if(indexPath.row == [self tableView:tableView numberOfRowsInSection:indexPath.section] - 1){
         [[cell textLabel] setText:@"Load more records"];
    } else {

        FBTransporterActivityModel *activityModel = [[[[FBModelManager sharedModelManager] getModelDictionary:kModelTransporterActivities] objectForKey:[NSString stringWithFormat:@"%d",[[FBUserManager sharedUserManager] userId]]] objectAtIndex:(int)indexPath.row];
        if(activityModel){
            [cell.textLabel setText:activityModel.userName];
        }

    }
}

然后你可以通过这种方式检测你的单元格是否被点击:

- (void) tableView:(UITableView*) tableView didSelecrRoqAtIndexPath:(IndexPath*) indexPath {
     if(indexPath.row == [self tableView:tableView numberOfRowsInSection:indexPath.section] - 1){
          // load your data and then:

          [tableView reloadData];
     }
}