目标C-设置UIPickerView委托

Question

I have one mainViewController and I have a UIPickerView. Now all is set up well, but when I run the app and select the textField I get Question Marks in my UIPickerView list.

Now I have just learned that, that is because I have not connected the delegate for it. However if I connect the delegate for it, then the textField does not get populated.

The TextField is in mainViewController.

So in my MainViewController.h I have imported the UIPickerView and have this code - which is all without errors. _pv is the UIPickerView.

 _pv = [[CategoryPicker alloc] init];

[_pv.categoryPicker setDelegate:self];
[_pv.categoryPicker setDataSource:_pv];

[_appPriorityTxtFld setInputView:_pv];
[_appPriorityTxtFld setInputAccessoryView:toolbar];

Now as you can see the Delegate is set to self, this will allow for the textField to be populated.

If I set that to _pv the then I get the list displayed properly, but the textField is not populated.

What am I missing??

Cheers

Answer 1

You need to implement the picker delegate method "pickerView:didSelectRow:inComponent:" and you need to set the selected text as textfild text. see the following code for reference,

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

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    textField.text = [dataArray objectAtIndex:row];
}

I think this may useful.