swift - 实例方法要求 'NSObject'符合

Question

我扩展了 RxSwift 的 Observable，我在 Moya 中使用它，所以我这样写

/// JSON map to object
    /// - returns: Observable<T>
    func jsonMapObject<T: EVReflectable>(type: T.Type, forKeyPath: String? = nil) -> Observable<Result<T, ORMError>>  {

        return self.map { rawResult in

            guard let result = rawResult as? Result<JSON, ORMError> else {
                return .failure(ORMError.ORMParseJSONError)
            }

            switch result {
            case let .success(json):

                guard json != JSON.null,
                    let dict = json.dictionaryObject else {
                        return .failure(ORMError.ORMParseJSONError)
                }

                guard let object: T = self.dictMap(from: dict) as T else {
                    return .failure(ORMError.ORMCouldNotMakeObjectError)
                }

                return .success(object)

            case let .failure(error):
                return .failure(error)
            }

        }
    }

这样写完这段代码后，我在编辑器中收到一条错误消息

Instance method 'dictMap(from:forKeyPath:)' requires that 'NSObject' conform to 'EVReflectable'

我不知道如何继续，因为这个错误不会消失

我的dictMap写成

///

Create the object from the dictionary
    internal func dictMap<T: NSObject>(from: NSDictionary?, forKeyPath: String? = nil) -> T where T: EVReflectable{
        let instance: T = T()
        let parsedObject: T = ((instance.getSpecificType(from ?? NSDictionary()) as? T) ?? instance)
        let _ = EVReflection.setPropertiesfromDictionary(from ?? NSDictionary(), anyObject: parsedObject, forKeyPath: forKeyPath)
//        if self.statusCode > 300  {
//            instance.addStatusMessage(DeserializationStatus.Custom, message: "HTTP status code: \(self.statusCode)")
//        }
        return parsedObject
    }

Answer 1

你的函数 func dictMap<T: NSObject>(from: NSDictionary?, forKeyPath: String? = nil) -> T where T: EVReflectable要求 T 是一个 NSObject 并符合 EVReflectable。为了做到这一点，NSObject 必须符合 EVReflectable。

您可能只需要删除 : NSObject>从上面:

func dictMap<T>(from: NSDictionary?, forKeyPath: String? = nil) -> T where T: EVReflectable