UITextField *passwordTextField = [[UITextField alloc] initWithFrame:CGRectMake(60, 120, 140, 23)];
  passwordTextField.font = FONT(15);
  passwordTextField.placeholder = @"请输入密码";
  [passwordTextField setSecureTextEntry:YES];
  [self.view addSubview:passwordTextField];
  
  UIView *lineView = [[UIView alloc]initWithFrame:CGRectMake(0,passwordTextField.height - 1, passwordTextField.width, 1)];
  lineView.backgroundColor = [UIColor orangeColor];
  [passwordTextField addSubview:lineView];