- (void)viewDidLoad {
    [super viewDidLoad];
    UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(100, 100, 100, 40)];
    textField.borderStyle = UITextBorderStyleLine;
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
    label.text = @"mg";
    label.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.0];
    textField.rightViewMode = UITextFieldViewModeAlways;
    textField.rightView = label;
    [self.view addSubview:textField];
    [label release];
    [textField release];
}