如何指定一个符合类的协议在夫特

Question

不知是可能创造一个协议，其中，其方法是指一种类型的贴合类

UHSyncObjectProtocol协议

protocol UHSyncObjectProtocol: class { 
    func sync(completionBlock: ((UHSyncObjectProtocol) -> Void)?) 
    // ideally, I want to refer to the conforming class instead of UHSyncObjectProtocol 
} 

用户配置文件类

class UHUserProfile: UHSyncObjectProtocol { 
    func sync(completionBlock: ((UHUserProfile) -> Void)?) { 
     // do something 
     completionBlock?(self) 
    } 
} 

我们呃账户类别

class UHUserAccount: UHSyncObjectProtocol { 
    func sync(completionBlock: ((UHUserAccount) -> Void)?) { 
     // do something 
     completionBlock?(self) 
    } 
} 

我不知道它是否可能。

Answer 1

可以使用泛型来实现这一

这里是例子

protocol UHSyncObjectProtocol: class { 
    associatedtype T 

    func sync(completionBlock: ((T) -> Void)?) 
    // ideally, I want to refer to the conforming class instead of UHSyncObjectProtocol 
} 

class UHUserProfile: UHSyncObjectProtocol { 
    func sync(completionBlock: ((UHUserProfile) -> Void)?) { 
     // do something 
     completionBlock?(self) 
    } 
} 

class UHUserAccount: UHSyncObjectProtocol { 
    func sync(completionBlock: ((UHUserAccount) -> Void)?) { 
     // do something 
     completionBlock?(self) 
    } 
}