滚动时，tableViewCell中的复选标记隐藏

debugcn 发表于 Dev

当我滚动表时，选中标记处于隐藏状态。我知道是因为Reusing Cell，但我不知道如何解决。请帮助我。这是我的代码：

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

    StudentTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier forIndexPath:indexPath];
    if (cell == nil) {
        cell = [[StudentTableViewCell alloc] init];
    }

    if (_btnCancel.hidden == NO) {
        cell.accessoryType = UITableViewCellAccessoryNone;

    } else {
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    }

    return cell;
}

我更改选中并取消选中didSelectRowAtIndexPath：

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell* cellCheck = [tableView cellForRowAtIndexPath:indexPath];
    NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];

    if (_btnCancel.hidden == NO) {
        if (cellCheck.accessoryType == UITableViewCellAccessoryNone) {
            cellCheck.accessoryType = UITableViewCellAccessoryCheckmark;
            TeacherInfo *courseStudent = studentQuitArray[indexPath.row];
            [dict setObject:courseStudent.id_user forKey:@"student_id"];

            [studentDetail addObject:dict];

        } else {
            cellCheck.accessoryType = UITableViewCellAccessoryNone;
            [studentDetail removeObject: studentQuitArray[indexPath.row]];
        }

    }
}

阿拉苏威

当您滚动表格视图时，cellForRowAtIndexPath将调用您将其中设置accessoryType为“无”的特定单元格。相反，请尝试如下所示。

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

    StudentTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier forIndexPath:indexPath];
    if (cell == nil) {
        cell = [[StudentTableViewCell alloc] init];
    }

    if (_btnCancel.hidden == NO) {
       TeacherInfo *courseStudent = studentQuitArray[indexPath.row];
       if ([studentDetail containsObject:courseStudent]) {
           cell.accessoryType = UITableViewCellAccessoryCheckmark;
       else {
           cell.accessoryType = UITableViewCellAccessoryNone;
       }
    } else {
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    }

    return cell;
}

didSelectRowAtIndexPath：

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell* cellCheck = [tableView cellForRowAtIndexPath:indexPath];
    NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];

    if (_btnCancel.hidden == NO) {
        if (cellCheck.accessoryType == UITableViewCellAccessoryNone) {
            cellCheck.accessoryType = UITableViewCellAccessoryCheckmark;
            TeacherInfo *courseStudent = studentQuitArray[indexPath.row];
            [dict setObject:courseStudent.id_user forKey:@"student_id"];

            [studentDetail addObject:dict];

        } else {
            cellCheck.accessoryType = UITableViewCellAccessoryNone;
            [studentDetail removeObject: studentQuitArray[indexPath.row]];
        }

    }
}

希望这会有所帮助。

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