Updated 远程教学相关文档 (markdown)

@@ -7,8 +7,10 @@
 ### 关于登录
 
 ```
-http://192.168.0.100:8788/home/sign?identifier=7
+1. 发送请求
+http://192.168.0.100:8788/home/sign?identifier=7 （identifier是用户id）
 
+2. 在返回的Json信息中获取urlSig
  {
     errMessage = "";
     expireTime = 0;
@@ -16,6 +18,7 @@ http://192.168.0.100:8788/home/sign?identifier=7
     urlSig = "eJxNkEtvgzAQhP*Lz1WLXyGulAPpI6KhSVOoUHuxCLbRFkEcMFWiqv89gIjUve3MzjfS-qIkim9bVcrMWlDoHmHm9cMo5*hmNPXJQqNlZpxuBp9zTvqLyR1jMnOSNkP6Kjuo9Ajj3Pcoo2zSQenagYER5V8ZeX7oaifd2ep-jBaKfnt92j2Ey50Q7-5jflrOWQhf*83LJkhVQsqOCHNerUnxNlOdnVW8CiCoton63pa4BBYdXVtEdybVeL7-iEUAKxP74hiy9Sd*TovFYir70U0Lh7ovJB7mmNDhCx76uwCbqVSq";    
 }
 
+3. 设置TIMLoginParam
 #define TIMAppid 1400004355
 #define TIMAppidString @"1400004355"
 #define TIMAccountType @"2243"
@@ -26,6 +29,8 @@ http://192.168.0.100:8788/home/sign?identifier=7
  param.sdkAppId = TIMAppid;
  param.appidAt3rd = TIMAppidString;
  param.accountType = TIMAccountType;
+
+4. 利用TIMManager进行登录操作
 ```
 ## 消息定义