- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
 {
        return 2;
  }

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    int count;
    if (component==0)
{
        count=2
    }
else
    {
        count =4
    }
    return count;
}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
 {
    NSString *str;
    if (component==0)
 {
        str=@"hiiii";
    }
else
    {
        str =@"hellooo";
    }
    return str;
}