How whatsapp get updated contacts from addressbook faster in iOS?

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北恋
北恋 2021-02-20 08:37

My findings

I am designing a logic to sync contact with my Backend. I gone through some apps that doing same thing in IOS. I will take the example of Wh

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  • 2021-02-20 09:05

    The way to do this is by registering an external change callback. This way, your app will be notified of any changes to the address book as soon as they happen.

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