后台返回NSInlineData格式

<236d6373 73415765 253a21e6 85a8e49a ....>

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

manager.responseSerializer = [AFHTTPResponseSerializer new];

manager.responseSerializer.acceptableContentTypes = [NSSetsetWithObjects:@"application/json",@"text/html",@"text/javascript",@"text/json",@"text/plain", nil]; 

1、AFHTTPResponseSerializer 改为 AFJSONResponseSerializer

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

manager.responseSerializer = [AFJSONResponseSerializer new];

manager.responseSerializer.acceptableContentTypes = [NSSetsetWithObjects:@"application/json",@"text/html",@"text/javascript",@"text/json",@"text/plain", nil];

2、或者在请求成功后

NSDictionary * dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingAllowFragments error:nil];