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以前用的好端端的接口，今天访问居然出错了，但是再用浏览器测试，发现可以正常返回数据，甚是奇怪啊。
下面是错误信息：
获取服务器响应出错 error=Error Domain=com.alamofire.error.serialization.response Code=-1016 "Request failed: unacceptable content-type: text/html" UserInfo=0x7fdfd8729680 {com.alamofire.serialization.response.error.response= { URL: http://172.16.1.31:7001/itom/getwork } { status code: 200, headers {
"Cache-Control" = "no-cache";
"Content-Type" = "text/html;charset=UTF-8";
Date = "Mon, 24 Nov 2014 03:13:16 GMT";
"Transfer-Encoding" = Identity;
"X-Powered-By" = "Servlet/2.5 JSP/2.1";
} }, NSErrorFailingURLKey=http://172.16.1.31:7001/itom/getwork, com.alamofire.serialization.response.error.data=<5b7b2273 74617475 73223a22 73756363 65737322 2c226d73 67223a22 e799bbe9 9986e688 90e58a9f 227d5d>, NSLocalizedDescription=Request failed: unacceptable content-type: text/html}
I also encountered the same problem. This means that your server is sending "text/html" instead of the already supported types. After a little search, my solution was to add "text/html" to acceptableContentTypes set in AFURLResponseSerialization class. Just search for "acceptableContentTypes" and add @"text/html" to the set manually. Of course, the ideal solution will be to change the tpe from the server, but for that you will hade to talk with the server team.
I hope this helps you. Best regards and less bugs as possible in the code.
op.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html”];
对应到自己的项目里面，我用的是AFNetworking这套网络请求包，需要改的是：
AFURLResponseSerialization.m文件
223行：
self.acceptableContentTypes = [NSSetsetWithObjects:@"application/json", @"text/html",@"text/json",@"text/javascript", nil];
加上蓝色部分，其实就是添加一种服务器返回的数据格式。
iOS AFN请求返回错误："Request failed: unacceptable content-type: text/html"
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原文地址：http://www.cnblogs.com/gaohe/p/4544222.html
