Added ability to intercept -[UITextView paste:]

JSQMessagesDemo/DemoMessagesViewController.m

@@ -18,6 +18,8 @@
 
 #import "DemoMessagesViewController.h"
 
+@interface DemoMessagesViewController () <JSQMessagesComposerTextViewPasteDelegate>
+@end
 
 @implementation DemoMessagesViewController
 
@@ -44,6 +46,7 @@ - (void)viewDidLoad
     self.senderId = kJSQDemoAvatarIdSquires;
     self.senderDisplayName = kJSQDemoAvatarDisplayNameSquires;
 
+    self.inputToolbar.contentView.textView.pasteDelegate = self;
 
     /**
      *  Load up our fake data for the demo
@@ -628,4 +631,23 @@ - (void)collectionView:(JSQMessagesCollectionView *)collectionView didTapCellAtI
     NSLog(@"Tapped cell at %@!", NSStringFromCGPoint(touchLocation));
 }
 
+#pragma mark - JSQMessagesComposerTextViewPasteDelegate methods
+
+
+- (BOOL)composerTextView:(JSQMessagesComposerTextView *)textView shouldPasteWithSender:(id)sender
+{
+    if ([UIPasteboard generalPasteboard].image) {
+        // If there's an image in the pasteboard, construct a media item with that image and `send` it.
+        JSQPhotoMediaItem *item = [[JSQPhotoMediaItem alloc] initWithImage:[UIPasteboard generalPasteboard].image];
+        JSQMessage *message = [[JSQMessage alloc] initWithSenderId:self.senderId
+                                                 senderDisplayName:self.senderDisplayName
+                                                              date:[NSDate date]
+                                                             media:item];
+        [self.demoData.messages addObject:message];
+        [self finishSendingMessage];
+        return NO;
+    }
+    return YES;
+}
+
 @end

JSQMessagesViewController/Views/JSQMessagesComposerTextView.h

@@ -18,6 +18,21 @@
 
 #import <UIKit/UIKit.h>
 
+@class JSQMessagesComposerTextView;
+
+/**
+ * A delegate used to forward custom notifications from `JSQMessagesComposerTextView`.
+ */
+@protocol JSQMessagesComposerTextViewPasteDelegate <NSObject>
+
+/**
+ * Asks the delegate whether or not the `textView` should use the original implementation of -[UITextView paste].
+ * If you want any custom pasting behavior, implement this delegate method and return `NO`
+ * when you want to handle pasting yourself.
+ */
+- (BOOL)composerTextView:(JSQMessagesComposerTextView *)textView shouldPasteWithSender:(id)sender;
+@end
+
 /**
  *  An instance of `JSQMessagesComposerTextView` is a subclass of `UITextView` that is styled and used 
  *  for composing messages in a `JSQMessagesViewController`. It is a subview of a `JSQMessagesToolbarContentView`.
@@ -34,6 +49,11 @@
  */
 @property (strong, nonatomic) UIColor *placeHolderTextColor;
 
+/**
+ * A delegate that conforms to `JSQMessagesComposerTextViewDelegate`. The default value is `nil`.
+ */
+@property (weak, nonatomic) id<JSQMessagesComposerTextViewPasteDelegate> pasteDelegate;
+
 /**
  *  Determines whether or not the text view contains text after trimming white space 
  *  from the front and back of its string.

JSQMessagesViewController/Views/JSQMessagesComposerTextView.m

@@ -156,6 +156,13 @@ - (void)setTextAlignment:(NSTextAlignment)textAlignment
     [self setNeedsDisplay];
 }
 
+- (void)paste:(id)sender
+{
+    if (!self.pasteDelegate || [self.pasteDelegate composerTextView:self shouldPasteWithSender:sender]) {
+        [super paste:sender];
+    }
+}
+
 #pragma mark - Drawing
 
 - (void)drawRect:(CGRect)rect