Ios Alamofire返回SwiftyJSON结果的Swift扩展方法
我将一个应用程序从Swift 2.2迁移到了3.0,它使用了GitHub上项目的扩展方法。Alamofire SwiftyJSON允许接收从Alamofire网络请求转换为SwiftyJSON实例的响应,如下所示:Ios Alamofire返回SwiftyJSON结果的Swift扩展方法,ios,swift,alamofire,swifty-json,Ios,Swift,Alamofire,Swifty Json,我将一个应用程序从Swift 2.2迁移到了3.0,它使用了GitHub上项目的扩展方法。Alamofire SwiftyJSON允许接收从Alamofire网络请求转换为SwiftyJSON实例的响应,如下所示: Alamofire.request(.GET, "http://httpbin.org/get", parameters: ["foo": "bar"]) .responseSwiftyJSON({ (request, response, json, error) in
Alamofire.request(.GET, "http://httpbin.org/get", parameters: ["foo": "bar"])
.responseSwiftyJSON({ (request, response, json, error) in
print(json) // json is a SwiftyJSON 'JSON' instance
print(error)
})
截至撰写此问题时,Alamofire SwiftyJSON项目尚未针对Swift 3进行更新。我正在寻找与Swift 3+和Alamofire 4+兼容的responseSwiftyJSON
扩展方法的等效实现。扩展方法
该解决方案包含了一项建议,用于与来自的Alamofire合作
它基于Alamofire中包含的类似扩展:
DataRequest.responseJSON(队列:选项:completionHandler:)
DataRequest.jsonResponseSerializer(选项:)
import Alamofire
import SwiftyJSON
extension DataRequest {
/// Adds a handler to be called once the request has finished.
///
/// - parameter options: The JSON serialization reading options. Defaults to `.allowFragments`.
/// - parameter completionHandler: A closure to be executed once the request has finished.
///
/// - returns: The request.
@discardableResult
public func responseSwiftyJSON(
queue: DispatchQueue? = nil,
options: JSONSerialization.ReadingOptions = .allowFragments,
completionHandler: @escaping (DataResponse<JSON>) -> Void) -> Self {
return response(
queue: queue,
responseSerializer: DataRequest.swiftyJSONResponseSerializer(options: options),
completionHandler: completionHandler
)
}
/// Creates a response serializer that returns a SwiftyJSON instance result type constructed from the response data using
/// `JSONSerialization` with the specified reading options.
///
/// - parameter options: The JSON serialization reading options. Defaults to `.allowFragments`.
///
/// - returns: A SwiftyJSON response serializer.
public static func swiftyJSONResponseSerializer(
options: JSONSerialization.ReadingOptions = .allowFragments) -> DataResponseSerializer<JSON> {
return DataResponseSerializer { _, response, data, error in
let result = Request.serializeResponseJSON(options: options, response: response, data: data, error: error)
switch result {
case .success(let value):
return .success(JSON(value))
case .failure(let error):
return .failure(error)
}
}
}
}
一旦你了解了阿拉莫菲尔在做什么,你会觉得很粗糙,但很优雅。在运行队列的线程上调用completionHandler,如果队列为nil,则在主线程上调用completionHandler。在Alamofire内部的NSOperationQueue上调用responseSerializer。我将在SWiftyJSON自述中添加对validate()的调用。感谢@user992167的反馈!我按照您的建议添加了validate()方法。
Alamofire.request("https://httpbin.org/get").validate().responseSwiftyJSON {
response in
print("Response: \(response)")
switch response.result {
case .success(let json):
// Use SwiftyJSON instance
print("JSON: \(json)")
case .failure(let error):
// Handle error
print("Error: \(error)")
}
}