Create FAQ.md

close #1387

FAQ.md

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+# FAQ
+
+*Frequently asked questions for JSQMessagesViewController*
+
+------------------------------------
+
+##### *Springy bubbles?*
+````objective-c
+- (void)viewDidAppear:(BOOL)animated
+{
+    [super viewDidAppear:animated];
+    self.collectionView.collectionViewLayout.springinessEnabled = YES;
+}
+````
+
+##### *Remove avatars?*
+````objective-c
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+    self.collectionView.collectionViewLayout.incomingAvatarViewSize = CGSizeZero;
+    self.collectionView.collectionViewLayout.outgoingAvatarViewSize = CGSizeZero;
+}
+
+- (id<JSQMessageAvatarImageDataSource>)collectionView:(JSQMessagesCollectionView *)collectionView avatarImageDataForItemAtIndexPath:(NSIndexPath *)indexPath
+{
+    return nil;
+}
+````
+
+##### *Customize your cells?*
+````objective-c
+- (UICollectionViewCell *)collectionView:(JSQMessagesCollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
+{
+    JSQMessagesCollectionViewCell *cell = (JSQMessagesCollectionViewCell *)[super collectionView:collectionView cellForItemAtIndexPath:indexPath];
+
+    // Customize the shit out of this cell
+    // See the docs for JSQMessagesCollectionViewCell
+
+    return cell;
+}
+````
+
+##### *Customize your toolbar buttons?*
+````objective-c
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+
+    // This button will call the `didPressAccessoryButton:` selector on your JSQMessagesViewController subclass
+    self.inputToolbar.contentView.leftBarButtonItem = /* custom button or nil to remove */
+
+    // This button will call the `didPressSendButton:` selector on your JSQMessagesViewController subclass
+    self.inputToolbar.contentView.rightBarButtonItem = /* custom button or nil to remove */
+
+    // Swap buttons, move send button to the LEFT side and the attachment button to the RIGHT
+    // For RTL language support
+    self.inputToolbar.contentView.leftBarButtonItem = [JSQMessagesToolbarButtonFactory defaultSendButtonItem];
+    self.inputToolbar.contentView.rightBarButtonItem = [JSQMessagesToolbarButtonFactory defaultAccessoryButtonItem];
+
+    // The library will call the correct selector for each button, based on this value
+    self.inputToolbar.sendButtonOnRight = NO;
+}
+````