ios - How can an app communicate with another app -



ios - How can an app communicate with another app -

i have restaurant app can create bookings. app 'a' restaurant, app 'b' users

app (restaurant) listens notifications people need create booking. there app needs listening notifications users (it hundred of users). app can send notification app b confirm or deny booking.

app b (user) listens notifications , sends notifications restaurant. app b needs listening notifications restaurant. app b can send notification app b confirm or deny received notification app a.

im wondering best approach this? ive never done app before.

-can app send force notification directly?

-or must app talk server, , server notifies relevant party.

-how app 'listen' notifications?

any advice or guidance appreciated.

i dont want appear sentiment based question. relatively new maybe there 1 way it? if there many ways apologise.

i think need have custom server handles logic of booking , sending force notifications. if concern sending notifications straight between apps without custom server, can utilize messaging services pubnub.

ios nsnotificationcenter nsnotifications

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