消息模块-发送失败出现红色的感叹号

xplan-ios/Main/Message/View/Session/SessionViewController.m

@@ -91,6 +91,7 @@
 - (void)viewWillAppear:(BOOL)animated {
 	[super viewWillAppear:animated];
 	[self.presenter getFansLike:self.session.sessionId];
+	self.sessionNavView.userId = self.session.sessionId;
 }
 
 - (void)initHeaderAndFooterRrfresh {
@@ -173,6 +174,22 @@
 	self.sessionNavView.userId = self.session.sessionId;
 }
 
+- (BOOL)isExistMessages:(NIMMessage *)message{
+	BOOL isExist = NO;
+	NIMMessage * model;
+	for (NIMMessage *item in self.messages.reverseObjectEnumerator.allObjects) {
+		if ([item isKindOfClass:[NIMMessage class]] && [item.messageId isEqual:message.messageId]) {
+			model = item;
+			isExist = YES;
+			break;
+		}
+	}
+	if (model) {
+		model = message;
+	}
+	return isExist;
+}
+
 #pragma mark - MessageProtocol
 - (void)onGetLimitChat:(ChatLimitModel *)chatLimit {
     BOOL chatDisabled = !chatLimit.chat && self.messages.count <= 0;
@@ -296,7 +313,9 @@
     if (message.session.sessionType != NIMSessionTypeP2P) {
         return;
     }
-    [self.messages addObject:message];
+	if (![self isExistMessages:message]) {
+		[self.messages addObject:message];
+	}
     [self.sessionTableView reloadData];
     [self.sessionTableView nim_scrollToBottom:YES];
 }
@@ -353,6 +372,14 @@
     } 
 }
 
+- (void)didFailRetry:(NIMMessage *)message {
+	if (message.isReceivedMsg) {
+		[[NIMSDK sharedSDK].chatManager fetchMessageAttachment:message error:nil];
+	} else {
+		[[NIMSDK sharedSDK].chatManager resendMessage:message error:nil];
+	}
+}
+
 #pragma mark - MessageToolbarViewDelegate
 - (void)keyboardWillChangeFrame:(CGRect)rect {
 	CGFloat heightFromBottom = rect.size.height;