Populating second picker corresponding to the value selected in first picker view on same view

Question

I want to use two picker views in same view where first picker view is of category and when a category is selected, its corresponding values are added to second picker view. How can I make it possible? Values are taken from JSON.

Answer 1

You can get value selected in first picker view like this

NSInteger row;
NSArray *firstPickerViewDataArray;
UIPickerView *firstPickerView;
NSString *selectedValue;

row = [firstPickerView selectedRowInComponent:0];
selectedValue  = [firstPickerViewDataArray objectAtIndex:row];

Get the data from server or wherever you want and store that into another array like

NSArray * secondPickerViewDataArray;

After that you can use below method to show values

    - (NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
        if (pickerView == secondPickerView){
          // Do whatever you want based on selected value in first PickerView
            return secondPickerViewDataArray[row];
            }else{
   //stuff for first pickerView
         }
            }