Question

我想访问在按钮动作事件中在tableview方法中使用的对象数据，它显示错误-“使用未声明的标识符”，这是我的代码段-

TableView方法-

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

    static NSString *CellIdentifier = @"BlogTableViewCell";

    BlogTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
     long index1 = 2 * (indexPath.row);
    long index2 = index1 + 1;
    if (index1 < [self.BlogsArray count]) {
        cell.vw_blog1.tag = index1;
    BlogModel *blog = [self.BlogsArray objectAtIndex:index1];
        cell.lbl_blogTitle1.text = blog.blogTitle;
        cell.lbl_blogDescripton1.text = blog.blogDesc;
}

我的按钮动作方法-

- (IBAction)btnAction_AuthorName1:(id)sender {

      NSLog(@"Author1 of blog1 is clicked");
      UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Consult" bundle:nil];
      DRDetailsViewController *DRDetailVC = (DRDetailsViewController *)[storyboard instantiateViewControllerWithIdentifier:@"DRDetailsViewController"];
      DRDetailVC.DoctorID = [NSString stringWithFormat:@"%@",blog.userId];
      [APP_DELEGATE.navigationController pushViewController:DRDetailVC animated:YES];

}

在blog.UserId处显示错误。

Answer 1

添加Tag并以Button方法创建cellForRowAtIndexPath操作。

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

    static NSString *CellIdentifier = @"BlogTableViewCell";

    BlogTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    cell.btn.tag = indexPath.row;
    [cell.btn addTarget:self action:@selector(btnAction_AuthorName1:) forControlEvents:UIControlEventTouchUpInside];
}

按钮操作代码。

- (IBAction)btnAction_AuthorName1:(UIButton *)sender {

    BlogModel *blog = [self.BlogsArray objectAtIndex:sender.tag];

    NSLog(@"Author1 of blog1 is clicked");
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Consult" bundle:nil];
    DRDetailsViewController *DRDetailVC = (DRDetailsViewController *)[storyboard instantiateViewControllerWithIdentifier:@"DRDetailsViewController"];
    DRDetailVC.DoctorID = [NSString stringWithFormat:@"%@",blog.userId];
    [APP_DELEGATE.navigationController pushViewController:DRDetailVC animated:YES];
}

Answer 2

在cellForRowAtIndexPath方法中为按钮添加标签。

cell.btn.tag = indexPath.row;

，然后获取所选索引的标签值

- (IBAction)btnAction_AuthorName1:(UIButton *)sender {

  BlogModel *blog = [self.BlogsArray objectAtIndex:sender.tag];

  NSLog(@"Author1 of blog1 is clicked");
  UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Consult" bundle:nil];
  DRDetailsViewController *DRDetailVC = (DRDetailsViewController *)[storyboard instantiateViewControllerWithIdentifier:@"DRDetailsViewController"];
  DRDetailVC.DoctorID = [NSString stringWithFormat:@"%@",blog.userId];
  [APP_DELEGATE.navigationController pushViewController:DRDetailVC animated:YES];

}

在表视图之外传递和访问对象数据

2 个答案: