ios – AFNetworking 2.0和响应序列化选项

概述一旦我触发对 JSON资源的请求,我就会得到以下信息： 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=0x1d87a2c0 {NSDebug 一旦我触发对 JSON资源的请求,我就会得到以下信息：

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=0x1d87a2c0 {NSDeBUGDescription=JsON text dID not start with array or object and option to allow fragments not set.}

问题是我应该在哪里设置AFNetworking 2.0中的允许片段？

更新：

我的类是AFhttpSessionManager的子类.我已经创建了一个JsONResponseSerializer,它也不起作用.

返回的JsON如下：

[{"StoryID":1,"Title":"The big red dog","Abstract":"There was a big red dog and the dog was very big","IsFeatured":true}]-(instancetype) initWithBaseURL:(NSURL *)url{    NSURL *base = [NSURL URLWithString:@"URL to the web service that returns the Json"];    self = [super initWithBaseURL:base];    AFJsONResponseSerializer *responseSerializer = [AFJsONResponseSerializer serializerWithReadingOptions:NSJsONReadingallowFragments];    [self setResponseSerializer:responseSerializer];    return self;}

返回的错误如下：

[0] (null)  @"NSDeBUGDescription" : @"InvalID value around character 0."

来自WEB服务器的响应：

[{"StoryID":1,"IsFeatured":true}]

来自WEB服务器的响应状态：

http/1.1 200 OKServer: Microsoft-IIS/7.0X-Powered-By: ASP.NETContent-Type: application/Json;charset=utf-8X-AspNetMvc-Version: 3.0Connection: closeDate: Mon,28 Oct 2013 20:02:21 GMTContent-Length: 121Cache-Control: privateX-AspNet-Version: 4.0.30319[{"StoryID":1,"IsFeatured":true}]

解决方法 您需要使用serializerWithReadingOptions创建自己的AFJsONResponseSerializer实例：并配置您的系统以使用它(代替默认的JsON响应序列化程序). 总结

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