问在滚动UITableView时取消切换UISwitch

EN

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *CellIdentifier = @"POICell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier ];

    //set the cell text to the
    cell.textLabel.text = [self.catNames objectAtIndex:[indexPath row]];
    NSString *toggle = [self.toggleArray objectAtIndex:[indexPath row]];
    //add switch
    cell.selectionStyle = UITableViewCellSelectionStyleNone;

    //create an instance of the database oject
    DataBase * dataBase = [[DataBase alloc] init];

    //open the database connection
    [dataBase openDB];
    NSString *imageName = [dataBase getPinImageNameFromCatID:[self.catIDs objectAtIndex:[indexPath row]]];

    //get the root file path for the images
    NSArray   *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString  *documentsDirectory = [paths objectAtIndex:0];
    NSString *filePath = [NSString stringWithFormat:@"%@/pinImages/%@",documentsDirectory, imageName];

    //add image
    NSURL *imageURL = [NSURL fileURLWithPath:filePath];
    NSData *imageData = [NSData dataWithContentsOfURL:imageURL];
    UIImage *image = [UIImage imageWithData:imageData];

    cell.imageView.image = image;
    NSLog(@"%@",[self.catIDs objectAtIndex:[indexPath row]]);

    UISwitch *switchView = [[UISwitch alloc] initWithFrame:CGRectZero];
    cell.accessoryView = switchView;
    [switchView addTarget:self action:@selector(switchChanged: ) forControlEvents:UIControlEventValueChanged];

    if ([toggle isEqualToString: @"OFF"]) {
        [switchView setOn:NO animated:NO];
    }else{
        [switchView setOn:YES animated:NO];
    }
    return cell;
}

- (void) switchChanged:(id)sender {

    //get the switch that it was sent from
    UISwitch *switchInCell = (UISwitch *)sender;
    //get the cell it was sent from
    UITableViewCell * cell = (UITableViewCell *) switchInCell.superview;
    //get the row it was sent from
    NSIndexPath * indexpath = [self.inputTableView indexPathForCell:cell];
    //cast the indexpath to int
    NSInteger variable = indexpath.row;
    //set the filter as off in the user defualts.
    [self.filterDic setValue:switchInCell.on ? @"ON" : @"OFF" forKey:[self.catIDs objectAtIndex:variable]];
    //store the newdic in the user defualts
    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    //save the dic to user defaults
    [prefs setObject:self.filterDic forKey:@"pinFilters"];

}