Question

我的第一个单元格中没有UISwitch，但滚动后突然出现，我不明白为什么？!!

我很感激一些建议甚至更好的编码想法！

谢谢！

截图 https://www.dropbox.com/sh/qxoc0yidpzxkfgv/gLra_Ilsuv

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我的代码

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

{
    SettingObject *settingObjectCell = [[[settingsItems objectAtIndex:indexPath.section] valueForKey:@"SectionItems"]objectAtIndex:indexPath.row];


    static NSString *CellIdentifier = @"SettingsCell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    // Selected row - custiomize
    UIView *customColorView = [[UIView alloc] init];


    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];

    }

    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;


    // add UISwitcher
    if ([settingObjectCell.switcher isEqualToString:@"YES"] || [settingObjectCell.switcher isEqualToString:@"NO"])

    {

        UISwitch *switcher = [[UISwitch alloc] initWithFrame:CGRectZero];

        //place for switcher
        cell.accessoryView = switcher;


        // load settings or get default
        NSString *switchYesNo = [settingsLoadedUserDefault objectForKey:[settingObjectCell title]] ? [settingsLoadedUserDefault objectForKey:[settingObjectCell title]] : settingObjectCell.switcher ;

        // add value to switcher
        [switcher setOn:[switchYesNo boolValue]];

        // action for switcher
        [switcher addTarget:self action:@selector(updateSwitch:) forControlEvents:UIControlEventValueChanged];

        // selection Turn OFF
        cell.selectionStyle = UITableViewCellSelectionStyleNone;

    }

    cell.textLabel.text = [settingObjectCell title];
    cell.detailTextLabel.text = [settingObjectCell subtitle];

    return cell;
}

Answer 1

如果切换器是NSString的类型，你应该使用isEqualToString：而不是isEqual：。将您的if语句更改为：

if ([settingObjectCell.switcher isEqualToString:@"YES"] || [settingObjectCell.switcher isEqualToString:@"NO"])
{
    // Your existing code
}
else
{
    //Move this line here
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    // remove switch
    cell.accessoryView = nil;
}

问题发生的原因是重用单元格，当您不需要时，必须清除单元格（删除开关）。它应该工作。

Answer 2

您需要使用prepareForReuse方法重置单元格。当您从tableview中取出单元格时，单元格不会重置，旧值仍在单元格上！

在UITableView的错误单元格中出现UISwitch

2 个答案: