问题：AFN中将token添加到请求头
错误信息：如下：
Domain=com.alamofire.error.serialization.response Code=-1011 "Request failed: unauthorized (401)" UserInfo={com.alamofire.serialization.response.error.response={ URL: http://132.com/appweb/phone/web/content } { status code: 401, headers {
"Cache-Control" = "no-cache, no-store, max-age=0, must-revalidate";
"Content-Length" = 82;
"Content-Type" = "application/json;charset=UTF-8";
Date = "Tue, 28 Jun 2016 08:14:50 GMT";
Expires = 0;
Pragma = "no-cache";
Server = "Apache-Coyote/1.1";
"X-Content-Type-Options" = nosniff;
"X-Frame-Options" = DENY;
"X-XSS-Protection" = "1; mode=block";
} }, NSErrorFailingURLKey=http://http://132.com/appweb/phone/web/content, com.alamofire.serialization.response.error.data=<7b22636fXXXXa>, NSLocalizedDescription=Request failed: unauthorized (401)}
用系统方式添加请求
//1. 发送请求
NSURL *url = [NSURL URLWithString:urlString];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
NSURLSessionDataTask *task;
request.HTTPMethod = @"GET";
//2.设置将token添加到请求头---setValue:forHTTPHeaderField: 此方法是系统的方法
[request setValue:accessToken forHTTPHeaderField:@"token"];
//3.调用AFN的封装的方法
- (NSURLSessionDataTask *)dataTaskWithRequest:(NSURLRequest *)request completionHandler:(void (^)(NSURLResponse *response, id responseObject, NSError *error))completionHandler;
//例子如下：
task = [self dataTaskWithRequest:request completionHandler:^(NSURLResponse * _Nonnull response, id _Nullable responseObject, NSError * _Nullable error) {
if (error == nil) { success(task, responseObject);//返回数据 // 写入缓存 } else { failure(@"请求数据失败", error); //网络请求失败，返回error信息}