UITableView中的內聯UiPickerView

Question

我使用了兩個以上的內聯選擇器視圖（不是UIDatePickerView），並且在所有過渡中都可以正常工作，但是我的問題是它混合了數據源值並顯示了兩個混合值。

我剛剛使用Apple的示例進行了內聯日期選擇器檢查。

我有data1PickerView及其自己的兩個DataSource命名為data1和data2 。

當我在tableViewCell didSelect上打開pickerView時，我的代碼如下

data1=[NSMutableArray arrayWithObjects:@"1",@"2",@"3",@"4",nil];
data2=[NSMutableArray arrayWithObjects:@"a",@"b",@"c",@"d",nil];

#pragma mark - UITableViewDelegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];


    if(indexPath.row==1){
        isData1=TRUE;
        isData2=FALSE;
    }

    else if(indexPath.row==2){

        isData2=TRUE;
        isData1=FALSE;
    }
    if (cell.reuseIdentifier == kDateCellID)
    {
        if (EMBEDDED_DATE_PICKER)
            [self displayInlineDatePickerForRowAtIndexPath:indexPath];
        else
            [self displayExternalDatePickerForRowAtIndexPath:indexPath];
    }
    else
    {
        [tableView deselectRowAtIndexPath:indexPath animated:YES];
    }
}
/*! Reveals the date picker inline for the given indexPath, called by "didSelectRowAtIndexPath".

 @param indexPath The indexPath to reveal the UIDatePicker.
 */
- (void)displayInlineDatePickerForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // display the date picker inline with the table content
    [self.tableView beginUpdates];

    BOOL before = NO;   // indicates if the date picker is below "indexPath", help us determine which row to reveal
    if ([self hasInlineDatePicker])
    {
        before = self.datePickerIndexPath.row < indexPath.row;
    }

    BOOL sameCellClicked = (self.datePickerIndexPath.row - 1 == indexPath.row);

    // remove any date picker cell if it exists
    if ([self hasInlineDatePicker])
    {
        [self.tableView deleteRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:self.datePickerIndexPath.row inSection:0]]
                              withRowAnimation:UITableViewRowAnimationFade];
        self.datePickerIndexPath = nil;
    }

    if (!sameCellClicked)
    {
        // hide the old date picker and display the new one
        NSInteger rowToReveal = (before ? indexPath.row - 1 : indexPath.row);
        NSIndexPath *indexPathToReveal = [NSIndexPath indexPathForRow:rowToReveal inSection:0];

        [self toggleDatePickerForSelectedIndexPath:indexPathToReveal];
        self.datePickerIndexPath = [NSIndexPath indexPathForRow:indexPathToReveal.row + 1 inSection:0];
    }

    // always deselect the row containing the start or end date
    [self.tableView deselectRowAtIndexPath:indexPath animated:YES];

    [self.tableView endUpdates];

    // inform our date picker of the current date to match the current cell
    [self updateDatePicker];
}


// The number of columns of data
- (int)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return 1;
}

// The number of rows of data
- (int)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{

    if(isData1)
    return data1.count;
    else if(isData2)
        return data2.count;
    else
        return 0;
}

// The data to return for the row and component (column) that's being passed in
- (NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{

    if(isData1)
        return [data1 objectAtIndex:row];
    else if(isData2)
        return [data2 objectAtIndex:row]
        ;
else
    return @"";
}

- (void)toggleDatePickerForSelectedIndexPath:(NSIndexPath *)indexPath
{
    [tblRegister beginUpdates];

    NSArray *indexPaths = @[[NSIndexPath indexPathForRow:indexPath.row + 1 inSection:0]];

    // check if 'indexPath' has an attached date picker below it
    if ([self hasPickerForIndexPath:indexPath])
    {
        // found a picker below it, so remove it
        [tblRegister deleteRowsAtIndexPaths:indexPaths
                              withRowAnimation:UITableViewRowAnimationFade];
    }
    else
    {

        // didn't find a picker below it, so we should insert it
        [tblRegister insertRowsAtIndexPaths:indexPaths
                              withRowAnimation:UITableViewRowAnimationFade];
    }

    [tblRegister endUpdates];
}

誰能告訴我是什么原因導致我的data1數據源與data2數據源交換值，反之亦然，如下圖所示

Answer 1

我懷疑的是，當UI呈現這些選擇器視圖時， isData1和isData2布爾值不是您期望的值。 我希望如果在- (NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component方法上放置一個斷點，您會發現有些問題。