ios - TableView 单元格重用导致按钮标题在滚动时发生变化

Question

我有一个显示名称和标题为“关注”的按钮的列表。当我点击按钮时，标题应更改为“取消关注”。如果我再次点击按钮，标题应该再次变为“关注”。这工作正常，但当我滚动表格时，其他单元格的标题也由于单元格重用而发生变化。

代码如下:

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

    static NSString *CellIdentifier = @"AuthorsListCell";
    AuthorsListTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier
                                                                     forIndexPath:indexPath];
    dic_eachAuthor = [[_arr_authors objectAtIndex:indexPath.row] mutableCopy];

    cell.lbl_authorName.text = [dic_eachAuthor objectForKey:@"name"];
    cell.btn_followOrUnfollow.tag = indexPath.row;

    if([dic_eachAuthor valueForKey:@"follow"]){
        [cell.btn_followOrUnfollow setTitle:@"UnFollow" forState:UIControlStateNormal];
    }
    else{

        [cell.btn_followOrUnfollow setTitle:@"Follow" forState:UIControlStateNormal];
    }

    // action button method declarations
    [cell.btn_followOrUnfollow addTarget:self action:@selector(followOrUnfollow:) forControlEvents:UIControlEventTouchUpInside];
    cell.selectionStyle = UITableViewCellSelectionStyleNone;

    return cell;
}


    -(void)followOrUnfollow:(UIButton *)sender
{
    if ([sender.titleLabel.text isEqualToString:@"Follow"]) {
        [sender setTitle:@"UnFollow" forState:UIControlStateNormal];
        [dic_eachAuthor setValue:@"1" forKey:@"follow"];

    }
    else if ([sender.titleLabel.text isEqualToString:@"UnFollow"]) {
        [sender setTitle:@"Follow" forState:UIControlStateNormal];
        [dic_eachAuthor setValue:nil forKey:@"follow"];


    }


}

请提出一些防止电池重复使用的建议。

Answer 1

在 cellForRowAtIndexPath 中的 followOrUnfollow 中也添加此条件

if ([sender.titleLabel.text isEqualToString:@"Follow"]) {
        [sender setTitle:@"UnFollow" forState:UIControlStateNormal];

    }
    else if ([sender.titleLabel.text isEqualToString:@"UnFollow"]) {
        [sender setTitle:@"Follow" forState:UIControlStateNormal];


    }