UIPicker

#pragma mark - UIPickerViewDelegate methods
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
}

#pragma mark - UIPickerViewDataSource methods
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
}

- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component
{
	return 40.0;
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{    
    return [self.arrDistance count];
}

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