无法使用第三方Swift类扩展

Question

我正在尝试使用位于https://github.com/goktugyil/EZSwiftExtensions的Swift扩展程序。自述文件状态

  

1.下载＆＃39; /来源＆＃39;在你的项目中。
  2.Congratulations！

我已经按照我的理解遵循了这些说明，并将Sources文件夹放入了我的项目中：

但是，当我尝试使用其中一个扩展名 self.hideKeyboardWhenTappedAround（）时，我收到错误＆＃34;类型值＆＃39; LoginVC＆＃39;没有会员＆hide.ceyboardWhenTappedAround＆＃39;＆＃34;。我对Swift非常陌生，所以我真的不确定我在这个问题出在哪里

我的代码副本：

import UIKit
class LoginVC: UIViewController, UITextFieldDelegate {

@IBOutlet weak var emailField: UITextField!
@IBOutlet weak var passwordField: UITextField!
override func viewDidLoad() {
    super.viewDidLoad()
    self.hideKeyboardWhenTappedAround(); // <--- Error produced here!
    // Do any additional setup after loading the view.
    self.emailField.delegate = self;
    self.passwordField.delegate = self;
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func textFieldShouldReturn(textField: UITextField) -> Bool {
    self.view.endEditing(true)
    return false
}
/*
// MARK: - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    // Get the new view controller using segue.destinationViewController.
    // Pass the selected object to the new view controller.
}
*/

}