Question

我在swift中使用AFNetworking 2.0进行呼叫 api如下 http://api.openweathermap.org/data/2.5/weather?q=Delhi

当我们在浏览器上点击此URL时，我们将获得一个JSON。这是一个GET请求。在邮递员上打这个api也会产生相同的结果现在我创建了一个帮助类WebService.swift，我在其中调用了一个成功和一个错误块

我的WebService.swift类如下

import UIKit

class WebService: NSObject {

static let sharedInstance = WebService()


func weatherService(loginCode:String, requestData:NSMutableDictionary, successBlock: (response: AnyObject!,headers: NSDictionary, callBack:String ) -> Void, errorBlock: (error: NSError,headers:NSDictionary,responseObject:AnyObject!) -> Void){

    var serviceURL = "http://api.openweathermap.org/data/2.5/weather?q=Delhi"
    var manager = AFHTTPRequestOperationManager()
    manager.requestSerializer = AFJSONRequestSerializer()

    manager.responseSerializer.acceptableContentTypes = NSSet(objects: "text/html","application/json")  as? Set<NSObject>


    manager.requestSerializer.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")

    manager.GET(serviceURL, parameters: requestData, success: { (operation:AFHTTPRequestOperation, responseObject:AnyObject) -> Void in
        var headersCollection = operation.valueForKey("response")?.valueForKey("allHeaderFields") as! NSDictionary
        var headers = headersCollection.mutableCopy() as! NSMutableDictionary
        headers["statusCode"] = NSNumber(integer: operation.response!.statusCode)
           var _callBack = requestData["callBack"] as! String
        successBlock(response:responseObject,headers:headers,callBack: _callBack)


        }) { (operation:AFHTTPRequestOperation, error:NSError) -> Void in


            var headersCollection = operation.valueForKey("response")?.valueForKey("allHeaderFields") as! NSDictionary
            var headers = headersCollection.mutableCopy() as! NSMutableDictionary
            headers["statusCode"] = NSNumber(integer: operation.response!.statusCode)

            errorBlock(error: error, headers: headers, responseObject: operation.responseObject)
    }


}

}

我在视图中从视图控制器调用的方法已加载

        let params = ["callBack": String(format: "%d", "weatherAPI")] as NSMutableDictionary

        WebService.sharedInstance.weatherService("URLHardcodedInWebServiceClass", requestData: params, successBlock: { (response, headers, callBack) -> Void in

            var dict = response as! NSDictionary


                println("Success with \(callBack)")

            }) { (error, headers, responseObject) -> Void in

                println("failed")

        }

现在的问题是每次我进入webservice类的错误块，其中作为NSMutableDictionary的头文件的内容是

{
"Access-Control-Allow-Credentials" = true;
"Access-Control-Allow-Methods" = "GET, POST";
"Access-Control-Allow-Origin" = "*";
Connection = "keep-alive";
"Content-Type" = "application/json; charset=utf-8";
Date = "Mon, 31 Aug 2015 18:53:36 GMT";
Server = nginx;
"Transfer-Encoding" = Identity;
"X-Source" = back;
statusCode = 200;
}

当我看到它显示的NSError时

打印错误说明：

Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" 
(JSON text did not start with array or object and option to allow fragments not set.) 
UserInfo=0x7fdb6865d5a0 {NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}

我收到的状态代码是200 而当我这样做 po operation.responseString 我明白了

json在那里，但有错误，我猜它没有正确形成。我尝试使用内容类型作为text / html的其他服务，它工作正常，因为我必须更改行

manager.requestSerializer.setValue("text/html; charset=utf-8", forHTTPHeaderField: "Content-Type")

其他服务的URL是 http://bluesapphireindia.in/WebService.asmx/GetEmployessJSON

这段代码工作正常

可能是什么原因。任何人都可以帮助我。感谢

Answer 1

我使用AFHTTPRequestOperation AFNetworking中的Swift类以不同的方式在我当前的项目中做了同样的事情。我希望它可以帮助你。

 func afnStartConnectionWithURL(urlEndPoint: String, enumName: enumAPIname, httpMethod: String, httpBody: AnyObject, headerValue: String){

    var _URL = NSURL(string: kBaseURL + urlEndPoint)
    var currentTime: NSTimeInterval = 10

    var request = NSMutableURLRequest(URL: _URL!, cachePolicy: NSURLRequestCachePolicy.ReloadIgnoringLocalCacheData, timeoutInterval: currentTime)
    request.HTTPMethod = httpMethod
    var err: NSError?
    if(httpMethod == kPOST){

        let jsonData:NSData = NSJSONSerialization.dataWithJSONObject(httpBody, options: .PrettyPrinted, error: nil)!
        request.HTTPBody = jsonData
    }
    request.addValue(headerValue, forHTTPHeaderField: "Authorization")
    request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    request.addValue("application/json", forHTTPHeaderField: "Accept")

    var op = AFHTTPRequestOperation(request: request)
    op.responseSerializer = AFJSONResponseSerializer()
    op.setCompletionBlockWithSuccess({ (operation: AFHTTPRequestOperation!, responseObject: AnyObject!) -> Void in

        operation.cancel()
        var dicConnectionResponse:NSDictionary = responseObject as! NSDictionary
        self.afnConnection_Result(dicConnectionResponse, enumName: enumName, afhttpRequestOperation: operation)

        },

        failure: { (operation: AFHTTPRequestOperation!, error:NSError!) -> Void in

            operation.cancel()
            self.afnConnection_Error(operation, enumName: enumName, error: error)
    })

    op.start()
}

此处afnConnection_Result和afnConnection_Error是回调委托方法。

在快速的AFNetworking 2.0中的Web服务调用问题

1 个答案: