PROSAGA码农传奇-swift/objective-C-Swift协议作为协议的通用参数

<div class =“post-text”itemprop =“text”>
   <pre>
    <code>
      protocol OperationDelegate {
    associatedtype T
    func onOperationFinished(result:Array<T>)
    func onOperationError(error: Error, errorMessage:String) 
}

protocol ResultDelegate {
    func findResult<OpDelegate: OperationDelegate>(query: String, odelegate: OpDelegate) 
}

</code>
  </pre>
  <P>
    //添加了一些PlayGround作品
  </p>
   <pre>
    <code>
          class ResultsFinder: ResultDelegate {

func findResult<OpDelegate>(query: String, odelegate: OpDelegate) where OpDelegate : OperationDelegate {

print(#function)
        // Do some operations
        let s1 = Student()
        s1.name = "one"
        let s2 = Student()
        s2.name = "two"

let addressList = [s1,s2]
        odelegate.onOperationFinished(result: addressList as! [OpDelegate.T])

}
}

</code>
  </pre>
  <P>
    也
  </p>
   <pre>
    <code>
      class ResultDisplay: OperationDelegate {

typealias T = Student

func onOperationFinished(result: [Student]) {
        // Display address
          print(#function)
    }

func onOperationError(error: Error, errorMessage: String) {
        // Display error
          print(#function)
    }

}

</code>
  </pre>
  <P>
    class Mainfunction {
  </p>
   <pre>
    <code>
      let resultDisplay = ResultDisplay()
let finder = ResultsFinder()
func start() {

print(#function)
    finder.findResult(query: "Sridhar", odelegate: resultDisplay)

}

</code>
  </pre>
  <P>
    }
  </p>
   <pre>
    <code>
      let main = Mainfunction()
main.start()

</code>
  </pre>
</DIV>