Still crash after send message about qmchatviewcontroller-ios HOT 19 CLOSED

- (void)insertMessagesToTheBottomAnimated:(NSArray *)messages {
    NSAssert([NSThread isMainThread], @"You are trying to insert messages in background thread!");
    NSAssert([messages count] > 0, @"Array must contain messages!");

    if (self.chatSections == nil) {
        NSDictionary *sectionsAndItems = [self updateDataSourceWithMessages:messages];
        NSArray *sectionsToInsert = sectionsAndItems[kQMSectionsInsertKey];
        NSArray *itemsToInsert = sectionsAndItems[kQMItemsInsertKey];

        NSIndexSet *sectionsIndexSet = [self indexSetForSectionsToInsert:sectionsToInsert];

        __weak __typeof(self)weakSelf = self;
        [self.collectionView performBatchUpdates:^{
            //
            __typeof(weakSelf)strongSelf = weakSelf;
            if ([sectionsIndexSet count] > 0) [strongSelf.collectionView insertSections:sectionsIndexSet];
            [strongSelf.collectionView insertItemsAtIndexPaths:itemsToInsert];

        } completion:nil];
        return;
    }

    NSUInteger sectionsToInsert = 0;
    NSMutableArray *indexPathToInsert = [NSMutableArray array];

    for (QBChatMessage *message in messages) {
        NSAssert(message.dateSent != nil, @"Message must have dateSent!");

        if ([self indexPathForMessage:message] != nil) continue;

        QMChatSection *firstSection = [self.chatSections firstObject];

        NSUInteger sectionIndex = [self.chatSections indexOfObject:firstSection];

        if ([message.dateSent timeIntervalSinceDate:[firstSection firstMessageDate]] > self.timeIntervalBetweenSections || firstSection == nil) {

            // move previous sections
            NSArray *indexPathToInsert_t = [indexPathToInsert copy];
            for (NSIndexPath *indexPath in indexPathToInsert_t) {
                NSIndexPath *updatedIndexPath = [NSIndexPath indexPathForRow:indexPath.row inSection:indexPath.section + 1];
                [indexPathToInsert replaceObjectAtIndex:[indexPathToInsert indexOfObject:indexPath] withObject:updatedIndexPath];
            }

            QMChatSection* newSection = [QMChatSection chatSectionWithMessage:message];
            [self.chatSections insertObject:newSection atIndex:0];

            sectionIndex = [self.chatSections indexOfObject:newSection];
            sectionsToInsert++;
        } else {
            [firstSection.messages insertObject:message atIndex:0];
        }

        [indexPathToInsert addObject:[NSIndexPath indexPathForRow:0
                                                        inSection:sectionIndex]];
    }

    NSMutableIndexSet *sectionsIndexSet = [NSMutableIndexSet indexSet];
    for (NSUInteger i = 0; i < sectionsToInsert; i++) {
        [sectionsIndexSet addIndex:i];
    }

    __weak __typeof(self)weakSelf = self;
    [self.collectionView performBatchUpdates:^{
        //
        __typeof(weakSelf)strongSelf = weakSelf;
        if ([sectionsIndexSet count] > 0) [strongSelf.collectionView insertSections:sectionsIndexSet];
        [strongSelf.collectionView insertItemsAtIndexPaths:indexPathToInsert];
    } completion:^(BOOL finished) {
        //
        __typeof(weakSelf)strongSelf = weakSelf;
        [strongSelf scrollToBottomAnimated:NO];
    }];
}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    [self checkChatConnection];

    [[IAWChatManager sharedInstance] addDelegate:self];
    [[QMApi instance].chatService addDelegate:self];
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];

    [[IAWChatManager sharedInstance] removeDelegate:self];
    [[QMApi instance].chatService removeDelegate:self];

    [[NSNotificationCenter defaultCenter] removeObserver:self.observerDidBecomeActive];
    [[NSNotificationCenter defaultCenter] removeObserver:self.observerDidEnterBackground];

    // Deletes typing blocks.
    [self.dialog clearTypingStatusBlocks];

    [[NSNotificationCenter defaultCenter] postNotificationName:@"StopPlayingAudioInChat" object:nil];
}

__typeof__(self) strongSelf = weakSelf;

NSArray* images = result;

QBChatMessage* message = [QBChatMessage new];
message.contentType = IAWMessageContentTypeImage;
message.senderID = strongSelf.senderID;
message.dialogID = strongSelf.dialog.ID;
message.dateSent = [NSDate date];
message.deliveredIDs = @[@(self.senderID)];
message.readIDs = @[@(self.senderID)];
message.text = [[images firstObject] JSONString];

[[QMApi instance].chatService sendMessage:message
                                 toDialog:strongSelf.dialog
                            saveToHistory:YES
                            saveToStorage:YES
                               completion:^(NSError* _Nullable error) {
    DLogWarn();
}];