[self.tableViewreloadRowsAtIndexPaths:@[[NSIndexPathindexPathForRow:i inSection:0]]withRowAnimation:UITableViewRowAnimationAutomatic];在測試的時候發現，cell的drawRect方法不執行，如果是直接reloadData  ，就沒問題，，

在log中發現了一句    This application is modifying the autolayout engine from a background thread after the engine was a  ，下面是我的通知方法，這樣在main線程中刷新就沒什么問題了，

- (void)receiveMessage:(NSNotification *)notification

{

    RCMessage *message = [[notificationobject] objectForKey:@"message"];

    if (message) {

        for (NSInteger i=0; i<self.customerArray.count; i++) {

            CustomerModel *model =self.customerArray[i];

            if ([model.ChatRoomIdisEqualToString:message.targetId]) {

                model.unreadMsg =@([[RCIMClientsharedRCIMClient] getUnreadCount:ConversationType_GROUPtargetId:message.targetId]);

                dispatch_async(dispatch_get_main_queue(), ^{

                    NSArray *visiableCells =self.tableView.visibleCells;

                    HomeListCell *cell = [self.tableViewcellForRowAtIndexPath:[NSIndexPathindexPathForRow:i inSection:0]];

                    if ([visiableCellscontainsObject:cell]) {

                        [self.tableViewreloadRowsAtIndexPaths:@[[NSIndexPathindexPathForRow:i inSection:0]]withRowAnimation:UITableViewRowAnimationAutomatic];

                    }

                });

                break;

            }

        }

    }

}