Ios 从第二个选择器列中选择值

我正在使用一个uipicker应用程序，其中我有两列选定的数据，使用此代码，我可以在选择器只有一行时从中选择值

- (void)viewDidLoad
{
    [super viewDidLoad];
_pickerData = @[@"item1", @"item2", @"Item 4", @"Item 5", @"Item 6"];
    self.picker.dataSource = self;
    self.picker.delegate = self;

}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{

}


// The number of columns of data
- (int)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
     return 1;
  //  return 2;
}

// The number of rows of data
- (int)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    return _pickerData.count;

}

- (NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
   return _pickerData[row];
  //    return _pickerData[row][component];
}


- (IBAction)selOptions:(id)sender {
    NSInteger row = [self.picker selectedRowInComponent:0];
    NSString *selected = [_pickerData objectAtIndex:row];

    NSLog(selected);

}
@end

有了这段代码，当我点击我的按钮时，我已经选择了whatwas的值，然后我可以继续按我的segue或我喜欢的任何东西

但是，我希望mypicker有两行，但是下面发布了代码…我无法在单击按钮时获得错误

- (void)viewDidLoad
{
    [super viewDidLoad];

     _pickerData = @[ @[@"item1", @"A"],
                     @[@"item2", @"B"],
                     @[@"item3", @"C"],
                     @[@"item4", @"D"],
                     @[@"item5",@"E"],
                     @[@"item6",@"F"]
                     ];

    // Connect data
    self.picker.dataSource = self;
    self.picker.delegate = self;

}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{

}
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

// The number of columns of data
- (int)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
   //  return 1;
     return 2;
}

// The number of rows of data
- (int)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    return _pickerData.count;

}

// 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
{

     return _pickerData[row][component];
}


- (IBAction)selOptions:(id)sender {
    NSInteger row = [self.picker selectedRowInComponent:0];
    NSString *selected = [_pickerData objectAtIndex:row];

    NSLog(selected);

NSInteger row2=[self.picker selectedRowInComponent:1];
NSString *selectedb=[_pickerData objectAtIndex:row2];

NSLog(selectedb);

}
@end

数据显示良好，但我不知道如何允许在单击“我的”按钮时选择两行中的值。 在此方面的任何帮助都将不胜感激

---

谢谢

[self.picker selectedRowUncomponent:0]；和[self.picker SelectedRowUncomponent:1]@iPhone我将更新添加到我的原始问题中。但是我仍然收到错误。未识别的选择器发送到instanceI我猜错误是因为NSLogselected；和NSLogselectedb；请将此更改为NSLog@%@，已选择；和NSLog@%@，选择b；哦@iphone我通常会收到这些警告，但忽略它们，因为它们以前从未给过我错误。谢谢，问题解决了it@iphonic如果[selectedb isEqualToString:@Test]{NSLog@Test}是否应使程序崩溃，并说NSarrayI isEqualToString未识别的选择器已发送到实例？原因据我所知，如果im错误，请纠正我选择的不再是字符串，而是保存了数组中的单个值