iOS请求头 User-Agent的添加

User-Agent，Device-UUID

1.iOS中有时候和后台协商后可能需要添加 User-Agent，Device-UUID

我们这个时候添加了一个继承 AFHTTPSessionManager 的单列，在这个地方可以添加User-Agent和Device-UUID

• (instancetype)sharedXMNotPolicyClient
  {
  static BikeNetworkAPIClient _shareClient = nil;
  static dispatch_once_t onceToken;//线程安全
  dispatch_once(&onceToken, ^{
  _shareClient = [[BikeNetworkAPIClient alloc] initWithBaseURL:[NSURL URLWithString:XM_API_SERVERNew]];
  _shareClient.securityPolicy = [AFSecurityPolicy policyWithPinningMode:AFSSLPinningModeNone];
  _shareClient.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/xml", @"application/json", @"text/html",@"text/json",@"text/javascript", @"text/plain", nil];
  _shareClient.requestSerializer.timeoutInterval = TimeoutInterval;
  NSStringuuid=[CMUUIDManager readUUID];
  // NSString *strHeader = [NSString stringWithFormat:@"iOS,%@,%@",kVersion,uuid];
  //下面有一个空格 千万不能删，空格是一个标识符
  NSString *strHeader = [NSString stringWithFormat:@"iOS/%@, com.cronusbike.DingdingTravel/%@",KXMCurrentDeviceSystemVersion,kVersion];
  [_shareClient.requestSerializer setValue:strHeader forHTTPHeaderField:@"User-Agent"];
  [_shareClient.requestSerializer setValue:uuid forHTTPHeaderField:@"Device-UUID"];
  });
  return _shareClient;
  }