WhatsApp show pop message

WhatsApp show pop message content in the notification bar. How can it show only new message notifications?
 For iPhone’s,
 Open WhatsApp –>
Click on Settings –>
Click on Notifications –>
Scroll to the bottom and toggle ‘View in lock screen’ to ‘Off’. For Samsung Android devices, Go to Settings –>
 Click on the ‘More’ tab –> 
Choose Application Manager –> Choose WhatsApp –>
Turn off ‘Show Notifications’* For handsets like Nokia Asha, Open WhatsApp –>
 Click on Settings –>
 Click on ‘Show Message Preview’ –> Just Disable It! *One thing to keep in mind is that this also removes the notification icon in the top bar.