iOS 使用AFNetworking遇到异常 Request failed: unacceptable content-type: text/html

http://www.jianshu.com/p/4bfcae659a44

常用修改方案：

self.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript",@"text/html",@"text/plain",nil];