- added open var scrollsToBottomOnFirstLayout (#213)

Added open var scrollsToBottomOnFirstLayout

CHANGELOG.md

@@ -5,7 +5,9 @@ The changelog for `MessageKit`. Also see the [releases](https://github.com/Messa
 --------------------------------------
 
 ## Upcoming release
+
 ### Added
+
 - **Breaking Change** `.custom((MessageContainerView)->Void)` case to `MessageStyle` enum. 
 [#163](https://github.com/MessageKit/MessageKit/pull/163) by [@SD10](https://github.com/SD10).
 
@@ -21,6 +23,9 @@ The changelog for `MessageKit`. Also see the [releases](https://github.com/Messa
 - `animationBlockForLocation(message:indexPath:messagesCollectionView)` method to `LocationMessageDisplayDelegate` to customize the display animation of the location message's map.
 [#210](https://github.com/MessageKit/MessageKit/pull/210) by [@etoledom](https://github.com/etoledom).
 
+- `scrollsToBottomOnFirstLayout` property to automatically scroll to the bottom of `MessagesCollectionView` on first load.
+[#213](https://github.com/MessageKit/MessageKit/pull/213) by [@FraDeliro](https://github.com/FraDeliro).
+
 ### Fixed
 
 -  `MessageInputBar` now correctly sizes itself when breaking its max height or pasting in large amounts of text
@@ -36,6 +41,7 @@ The changelog for `MessageKit`. Also see the [releases](https://github.com/Messa
 [#174](https://github.com/MessageKit/MessageKit/pull/174) by [@etoledom](https://github.com/etoledom).
 
 ### Changed
+
 - **Breaking Change** `snapshotOptionsForLocation` method is now part of `LocationMessageDisplayDelegate`. 
 [#150](https://github.com/MessageKit/MessageKit/pull/150) by [@etoledom](https://github.com/etoledom).
 
@@ -62,11 +68,10 @@ The changelog for `MessageKit`. Also see the [releases](https://github.com/Messa
 [#177](https://github.com/MessageKit/MessageKit/pull/177) by [@cwalo](https://github.com/cwalo).
 
 ### Removed
+
 - **Breaking Change** `cellTopLabelInsets` and `cellBottomLabelInsets` from `MessagesCollectionViewFlowLayout`.
 [#166](https://github.com/MessageKit/MessageKit/pull/166) by [@SD10](https://github.com/SD10).
 
-----------------
-
 ## [[Prerelease] 0.8.2](https://github.com/MessageKit/MessageKit/releases/tag/0.8.2)
 ### Added
 - Support for Swift 4

Example/Sources/ConversationViewController.swift

@@ -39,6 +39,7 @@ class ConversationViewController: MessagesViewController {
         messagesCollectionView.messagesDisplayDelegate = self
         messagesCollectionView.messageCellDelegate = self
         messageInputBar.delegate = self
+        scrollsToBottomOnFirstLayout = true //default false
 
         navigationItem.rightBarButtonItem = UIBarButtonItem(image: UIImage(named: "ic_keyboard"),
                                                             style: .plain,

Sources/MessagesViewController.swift

@@ -31,6 +31,8 @@ open class MessagesViewController: UIViewController {
     open var messagesCollectionView = MessagesCollectionView(frame: .zero, collectionViewLayout: MessagesCollectionViewFlowLayout())
 
     open var messageInputBar = MessageInputBar()
+    
+    open var scrollsToBottomOnFirstLayout: Bool = false
 
     private var isFirstLayout: Bool = true
 
@@ -70,6 +72,11 @@ open class MessagesViewController: UIViewController {
             messagesCollectionView.contentInset.bottom = messageInputBar.frame.height
             messagesCollectionView.scrollIndicatorInsets.bottom = messageInputBar.frame.height
             isFirstLayout = false
+            
+            //Scroll to bottom at first load
+            if scrollsToBottomOnFirstLayout {
+                messagesCollectionView.scrollToBottom(animated: false)
+            }
         }
     }