AFNetworking 3和Swift 2-无法转换值NSURLSessionDataTask

Question

当尝试从AFHTTPSessionManager访问GET函数时，我收到错误，输入操作：

  

＆＃34;无法转换类型＆＃39;（NSURLSessionDataTask！，AnyObject！）的值 - ＆gt;虚空＆＃39;预期参数类型＆＃39;（（NSURLSessionDataTask，AnyObject？） - ＆gt; Void）？＆＃39;＆＃34;

    return self.GET("search", parameters: parameters, success: {(operation:NSURLSessionDataTask!, response:AnyObject!) -> Void in
        let dictionaries = response["businesses"] as? [NSDictionary]
        if dictionaries != nil {
            completion(Business.businesses(array: dictionaries!), nil)
            self.appDelegate.businessesLoaded = true
        }
        }, failure: { (operation: AFHTTPSessionManager?, error: NSError!) -> Void in
            completion(nil, error)
    })!

AFHTTPSessionManager.m GET功能：

    - (NSURLSessionDataTask *)GET:(NSString *)URLString
                   parameters:(id)parameters
                      success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
                      failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure
    {
        return [self GET:URLString parameters:parameters progress:nil success:success failure:failure];
    }

这一切都与AFHTTPRequestOperation一起使用，AFHTTPRequestOperation不再是已弃用的NSURLConnection的AFNetworking 3的一部分。希望有人可以对此有所了解，并提前非常感谢你！