fixed a typo and added gitignore

.gitignore

@@ -0,0 +1,28 @@
+# Xcode
+#
+build/
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata
+*.xccheckout
+*.moved-aside
+DerivedData
+*.hmap
+*.ipa
+
+# CocoaPods
+#
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# http://guides.cocoapods.org/using/using-cocoapods.html#should-i-ignore-the-pods-directory-in-source-control?
+#
+Pods/
+
+.DS_Store
+*/.DS_Store

TeamTalk/IOSDuoduo/Module/DataBase/DDDatabaseUtil.h

@@ -61,7 +61,7 @@ typedef void(^DDGetLastestCommodityMessageCompletion)(DDMessageEntity* message);
  *  @param sessionID  sessionID
  *  @param completion 完成获取最新的消息
  */
-- (void)getLastestMessageForSessionID:(NSString*)sessionID completion:(DDDBGetLastestMessageCompletion)completion;
+- (void)getLatestMessageForSessionID:(NSString*)sessionID completion:(DDDBGetLastestMessageCompletion)completion;
 
 /**
  *  在|databaseMessageQueue|执行查询操作，分页获取聊天记录

TeamTalk/IOSDuoduo/Module/DataBase/DDDatabaseUtil.m

@@ -293,7 +293,7 @@ - (void)getLasetCommodityTypeImageForSession:(NSString*)sessionID completion:(DD
     });
 }
 
-- (void)getLastestMessageForSessionID:(NSString*)sessionID completion:(DDDBGetLastestMessageCompletion)completion
+- (void)getLatestMessageForSessionID:(NSString*)sessionID completion:(DDDBGetLastestMessageCompletion)completion
 {
     dispatch_async(self.databaseMessageQueue, ^{
         if ([_database tableExists:TABLE_MESSAGE])

TeamTalk/IOSDuoduo/Module/Messages/DDMessageModule.m

@@ -87,7 +87,7 @@ - (void)getLastMessageForSessionID:(NSString*)sessionID completion:(GetLastestMe
         return;
     }
     //没有未读消息，读数据库
-    [[DDDatabaseUtil instance] getLastestMessageForSessionID:sessionID completion:^(DDMessageEntity *message, NSError *error) {
+    [[DDDatabaseUtil instance] getLatestMessageForSessionID:sessionID completion:^(DDMessageEntity *message, NSError *error) {
         completion(message);
     }];
 }