How to reset UIPickerView to index:0,iPhone

Question

I am trying to reset the UIPickerView on button click. My pickerview id is created at runtime, I have delegates set already. After googling, I found

[pickerView reloadAllComponents];

But this makes my app crash everytime it reaches here.

Object at index 0 is "Select from list" and then the items. When the submit button is clicked, I want that the "Select from list" should remain at the top of my label (selected index: 0).

Here is my code

ViewDidload

 pickerView = [[UIPickerView alloc] init];
    pickerView.delegate = self;
    pickerView.dataSource = self;

  -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
        return 1;
    }


 // Total rows in our component.
    -(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
        return [nameArray count];
    }

// Display each row's data.
-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
    return [nameArray objectAtIndex: row];
    }

// Do something with the selected row.

    -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
        dlbl.hidden=YES;
        NSLog(@"You selected this: %@", [nameArray objectAtIndex: row]);
        [btnSelectDesigner setTitle:[nameArray objectAtIndex: row] forState:UIControlStateNormal]; 

    }

and, on button click:

-(IBAction)btnSubmitClicked:(id)sender{
[pickerView reloadAllComponents];
}

Any idea what I'm doing wrong?

Thanks

Answer 1

[picker reloadAllComponents];
[picker selectRow:0 inComponent:0 animated:YES];

Answer 2

Swift version:

picker.selectRow(0, inComponent: 0, animated: true)