I am writing a IM app on iOS, and not sure about how to ensure that the other side has received my message. Could anyone give me some suggestions or existing frameworks?
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Are you using a server to facilitate the communication or are you sending messages directly from one device to another? – drewag May 30 '14 at 23:50
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@drewag, I am using Pubnub and sending messages directly from one client to another. However, if necessary, I can store messages through my own server. – HanXu May 30 '14 at 23:51
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You can have the device that receives a message send data back that confirms the message has been received. Most likely each message would be assigned a unique id that the receiving device would send back so that it knows specifically which message was received.
I am not familiar with Pubnub but looking quickly at their SDK it looks like you can send messages both directions on a single channel, or else you could setup one channel for sending messages and one channel for confirming messages.
drewag
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