I try to change the default MessagesBubbleImage of JSQMessagesViewController by passing custom image into init method, but it's not working, here is the code
outgoingBubbleImageView = JSQMessagesBubbleImageFactory.init(bubbleImage: UIImage(named: "bubbleMine"), capInsets: UIEdgeInsetsZero).outgoingMessagesBubbleImageWithColor(UIColor.grayColor())