Check out example codes for "chating App in swift". It will help you in understanding the concepts better.
Code Example 1
lazy var outgoingBubble: JSQMessagesBubbleImage = {
return JSQMessagesBubbleImageFactory()!.outgoingMessagesBubbleImage(with: UIColor.jsq_messageBubbleBlue())
}()
lazy var incomingBubble: JSQMessagesBubbleImage = {
return JSQMessagesBubbleImageFactory()!.incomingMessagesBubbleImage(with: UIColor.jsq_messageBubbleLightGray())
}()
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