ios - Alamofire 无法推断当前上下文中的闭包类型

Question

我正在为 DataRequest 创建扩展以记录事件

func log() -> Self {
        let responseSerializer = DataRequest.jsonResponseSerializer(options: .allowFragments)
        return response(queue: nil, responseSerializer: responseSerializer) { response in
            if let object = response.result.value {
                /* do the job */
            }
        }
}

得到错误Unable to infer closure type in the current context 因为它有 (DataResponse<T.SerializedObject>) -> Void通用类型，有没有办法显式设置类型来修复这个错误？

Alamofire 版本: 4.7.2 Xcode 版本: 9.3 Swift 版本: 4.0 运行 Alamofire 的平台: iOS

Answer 1

func log() -> Self {
        let responseSerializer = DataRequest.jsonResponseSerializer()
        return response(responseSerializer: responseSerializer) { [weak self] response in
            guard let _self = self else { return }
            _self.printRequestString(response)
        }
    }

效果很好。