From 38f90aa20adfa5fc346dda3cc151fa68bf2f6a5d Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Tue, 26 Mar 2019 10:27:45 +0300
Subject: Fix crashes

---
 Juick/ViewControllers/ChatViewController.m     | 5 ++++-
 Juick/ViewControllers/MessagesViewController.m | 9 ++++++---
 2 files changed, 10 insertions(+), 4 deletions(-)

(limited to 'Juick/ViewControllers')

diff --git a/Juick/ViewControllers/ChatViewController.m b/Juick/ViewControllers/ChatViewController.m
index a76cc00..0de3d2a 100644
--- a/Juick/ViewControllers/ChatViewController.m
+++ b/Juick/ViewControllers/ChatViewController.m
@@ -47,7 +47,10 @@
             [self.tableView beginUpdates];
             [self.tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:YES];
             [self.tableView endUpdates];
-            [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:[self.messages count]-1 inSection:0] atScrollPosition:UITableViewScrollPositionBottom animated:NO];
+            NSInteger messagesCount = [self.messages count];
+            if (messagesCount > 0) {
+                [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:[self.messages count]-1 inSection:0] atScrollPosition:UITableViewScrollPositionBottom animated:NO];
+            }
         }
         [self.refreshControl endRefreshing];
     }];
diff --git a/Juick/ViewControllers/MessagesViewController.m b/Juick/ViewControllers/MessagesViewController.m
index 5d47d01..f2a20a9 100644
--- a/Juick/ViewControllers/MessagesViewController.m
+++ b/Juick/ViewControllers/MessagesViewController.m
@@ -70,9 +70,12 @@ NSString* const messageCellIdentifier = @"messageCell";
             [self.tableView endUpdates];
             [self.refreshControl endRefreshing];
             if (self.shouldScrollToUnreadOnRefresh) {
-                NSInteger itemToScroll = [self.firstUnread integerValue] ? : self.messages.count - 1;
-                NSIndexPath *lastRow = [NSIndexPath indexPathForRow:itemToScroll inSection:0];
-                [self.tableView scrollToRowAtIndexPath:lastRow atScrollPosition:UITableViewScrollPositionBottom animated:NO];
+                NSInteger messagesCount = [self.messages count];
+                if (messagesCount > 0) {
+                    NSInteger itemToScroll = [self.firstUnread integerValue] ? : self.messages.count - 1;
+                    NSIndexPath *lastRow = [NSIndexPath indexPathForRow:MIN(itemToScroll, messagesCount) inSection:0];
+                    [self.tableView scrollToRowAtIndexPath:lastRow atScrollPosition:UITableViewScrollPositionBottom animated:NO];
+                }
                 self.firstUnread = nil;
             }
         }];
-- 
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