的ViewController不符合協議xyzDelegate

Question

// QuizPopUpViewController.swift 
@objc protocol QuizPopUpViewControllerDelegate { 
    func ApplyNowToSendBack() 
} 

class QuizPopUpViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UITextViewDelegate { 
    weak var delegate: QuizPopUpViewControllerDelegate? 
} 


// giving event from here 
if isError == false { 
    self.delegate?.ApplyNowToSendBack() // delegate method 
    } 
} 

// Another Viewcontroller  
class ShortlistViewController: ParentViewController , QuizPopUpViewControllerDelegate { 

} 

，我得到以下錯誤：

Type "ShortlistviewController" does not conform to protocol QuizPopUpViewControllerDelegate

Answer 1

的問題到底是什麼錯誤說明是在暗示。您需要讓您的班級符合QuizPopUpViewControllerDelegate代表。

爲此，您需要聲明函數，QuizPopUpViewControllerDelegate中的內容。

// Another Viewcontroller  
    class ShortlistViewController: ParentViewController , QuizPopUpViewControllerDelegate { 
      func ApplyNowToSendBack() { 
      // do something with the callback. 
      } 
    } 

爲了避免要求在今後這樣的問題，我會推薦閱讀更多關於delegate pattern in Swift。