Swift2协议扩展NSObjectProtocol

我想要的是为某些NSObjectProtocol自动实现委托方法，它符合某些协议，但我努力了，没有完成

下面是演示

更新以获得更准确的信息

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我得到了一个协议

PagedLoadable

来获取collectionView所需的信息，然后

扩展NSObjectProtocol where Self:Delegatable

，自动配置对象实现

PagedLoadable

protocol PagedLoadable {
    var count: Int { get }

}

protocol Delegatable: UICollectionViewDelegate, UICollectionViewDataSource {


}

extension PagedLoadable where Self: Delegatable {
    func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
        return  count
    }

    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 1
    }

    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        let cell = UICollectionViewCell()
        return cell
    }
}

class vc: UIViewController {

}

extension vc: PagedLoadable {
    var count: Int {
        return 1
    }
}

extension vc: Delegatable {

}

创建协议
//类SurveyDownloadHandler

protocol SurveyDownloadHandlerDelegate {

     func surveyDownloadSuccessfully(notiExpireRemainingTime : Int)
     func surveyDownloadConnectionFail()
}


class SurveyDownloadHandler: NSObject  {

    var delegate: SurveyDownloadHandlerDelegate! =  nil
}

//用于将方法调用回类A

delegate.surveyDownloadSuccessfully（notiExpireRemainingTime）

//甲级

class A : UIViewController,SurveyDownloadHandlerDelegate{

   let surveyDownloadHandlerObject : SurveyDownloadHandler = SurveyDownloadHandler()

   @IBAction func onTapClick(sender: AnyObject) {

          self.surveyDownloadHandlerObject.delegate = self
          self.surveyDownloadHandlerObject.startDownloadingSurvey()
     }
  }

   func surveyDownloadSuccessfully(notiExpireRemainingTime : Int)
   {
   }
   func surveyDownloadConnectionFail()
   {

  }
}

---

您正在尝试实现对协议的扩展，但继承除外。经过一些实验，我可以用下面的方法消除你的错误

    //: [Next](@next)
    protocol PagedLoadable {
        var count: Int { get }
    }

    protocol Delegatable: UICollectionViewDelegate, UICollectionViewDataSource {

    }
    extension Delegatable {

    }
//Removed since code will not be able to resolve dependency 
    extension PagedLoadable /*where Self: Delegatable*/ {

        func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
            return  count
        }

        func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
            return 1
        }

        func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
            let cell = UICollectionViewCell()
            return cell
        }
    }

//一种方法是

    class vc: UIViewController,PagedLoadable, Delegatable {
        var count: Int {
            return 1
        }

    }

//或者你也可以这样做

extension vc: PagedLoadable, Delegatable {
    var count: Int {
        return 1
    }
}

---

您遇到的错误是什么？类型“vc”不符合协议“UICollectionViewDataSource”为什么不定义可删除的直接扩展名？@findall您能告诉我吗？T_T@InvokerLaw很抱歉，我已经测试了我所说的内容，但编译器因segfault崩溃，即使它已通过测试。（我尝试了UICollectionViewDataSource*/}所需的扩展可删除{/*实现）我想要的是为一些协议制作一个运行时的“插件模块”，无需实现Hey@Girish Kolari，我已经更新了描述，请看一看itI did need/*where Self:Delegatable*/bcoz我需要将delegate设置为Delegatable对象如果它是纯swift对象，没有参考目标C运行时，你可以在where Self:Delegatable执行。我只是好奇-在你的vc代码中，对象是它的delegate对象-你将它设置为delegate对象有什么错误