Merge branch 'dev' of github.com:jpush/jmessage-react-plugin into dev

Author: KenChoi

ios/RCTJMessageModule/RCTJMessageModule.m

@@ -821,6 +821,12 @@ - (JMSGOptionalContent *)convertDicToJMSGOptionalContent:(NSDictionary *)dic {
     return;
   }
 
+  BOOL isDescend = false;
+  if (param[@"isDescend"]) {
+    NSNumber *number = param[@"isDescend"];
+    isDescend = [number boolValue];
+  }
+  
   [self getConversationWithDictionary:param callback:^(JMSGConversation *conversation, NSError *error) {
     if (error) {
       failCallback(@[[error errorToDictionary]]);
@@ -832,12 +838,16 @@ - (JMSGOptionalContent *)convertDicToJMSGOptionalContent:(NSDictionary *)dic {
       JMSGMessage *message = obj;
       return [message messageToDictionary];
     }];
-
+    
     if (!messageArr) {
       successCallback(@[@[]]);
       return;
     }
 
+    if (isDescend) {
+      messageDicArr = [[messageDicArr reverseObjectEnumerator] allObjects];
+    }
+    
     successCallback(@[messageDicArr]);
   }];
 }