Question

I have the following code that should change the selected rows in two different components in a UIPickerView, but only the first one changes.

[pickerView selectRow:[pickerView selectedRowInComponent:0] inComponent:1 animated:TRUE];   
[pickerView selectRow:[pickerView selectedRowInComponent:1] inComponent:0 animated:TRUE];

But when i do the following, they both change.

[pickerView selectRow:5 inComponent:0 animated:TRUE];
[pickerView selectRow:3 inComponent:1 animated:TRUE];

What is wrong with the first code, why is it not working?

Answer 1

Probably because they refer to each others.

You should record the selected row and then use it:

NSInteger selectedRowInFirst = [pickerView selectedRowInComponent:0];
NSInteger selectedRowInSecond = [pickerView selectedRowInComponent:1];

[pickerView selectRow:selectedRowInFirst inComponent:1 animated:TRUE];   
[pickerView selectRow:selectedRowInSecond inComponent:0 animated:TRUE];