How Does Facebook Messenger Clear Push Notifications from the Lock Screen If You'Ve Read Them on Desktop

How does Facebook Messenger clear push notifications from the lock screen if you’ve read them on desktop?

See the Multitasking Enhancements and the silent push notifications in particular. Using the silent push you can notify your app that new content is available and also download that content and/or set the badge number for example without displaying the notification in the "Notification Center". You'll have to set the UIBackgroundModes with the remote-notification value in order to make this work.

You can send silent push if the user has seen the content on another platform and clear the badge number on your iOS app.

How does FB messenger removes push notification from iOS app when I see the message on FB Desktop?

What you do is after you've sent the notification you want to remove, you send a notification with the message="" and badge=0. I just tested this in a node js application and it removed the previous notification like you are saying.

Is there a way to send push notifications only to the lock screen?

There is no way to programmatically control where or when a user receives a push notification. That setting is controlled by the user in the app-specific settings, not the app itself.

I also do not believe that sending one push a second is a scalable solution. You don't have control of when a user gets a push notification, and pushing that frequently would likely cause Apple to throttle your notifications.

How to force notifications to stay on the lock screen?

What you try to achieve has nothing to do with a notification this functionality comes from EventKit framework. More on that you can read on this link: Setting an Alarm.

Hope it helps.

iOS9 Quick Reply from lock screen API

1)Yes, it can be possible. It is named as Interactive notification. It is introduced in iOS 8.

2) Here is the blog explaining the interactive notification

3)Also there is tutorial
present on web for integrating in the App

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