NIDiscoveryToken sometimes returns Nil value

Question

lance145 OP

Created Apr ’21

Replies 2

Boosts 0

Views 1.1k

Participants 3

I'm using NWConnection to send my discoveryTokens. When an outgoing connection is found, I have the following code:

Code Block let session = NISession()
     
guard let token = session.discoveryToken else {
    print("discoveryToken is nil")
    return
}
guard let data = try? NSKeyedArchiver.archivedData(withRootObject: token, requiringSecureCoding: true) else {
    return
}
//  send data ...

Why is it that the discoveryToken sometimes returns nil? Is there a remedy for this?

This has happened on multiple occasions and because of this nothing is sent. There doesn't seem to be a workaround nor any documentation on why this occurs

Boost

Answer 1

rp_bt OP

May ’21

On my iPhone:

Settings > General > Reset > Reset All Settings

Worked for me.

Cheers!
Rahul

0

Answer 2

OP

Apple

May ’21

This discoveryToken property on the NISession object can be nil if the NISession is immediately invalidated. Please check if the session:didInvalidateWithError: method on the NISessionDelegate is called immediately after creating the NISession object, the error code will indicate the issue.

1