core bluetooth - ios corebluetooth reconnect device after close app without call cancelPeripheralConnection -


the follow:

  1. open app
  2. scan device -> paring -> connecting -> write setting information. it's successful.
  3. double tap on home button , remove app.
  4. i see in bluetooth menu in setting app device still connecting. if turn device off turn on, setting app connect device. seems setting app try re-connect paired device.

  5. open app again, retrieve peripherals:

    [centralmanager retrieveconnectedperipheralswithservices:servicesuuid];

    result:

    cbperipheral: 0x14d741b0, identifier = 3e0a0fe9-33db-d2fc-90ce-b73ab64045db, name = time app, state = disconnected

  6. connect retrieved peripheral, system didn't trigger callback: didfailtoconnectperipheral or didconnectperipheral.

  7. i try use preservation , restoration, uiapplicationlaunchoptionsbluetoothcentralskey return null.

    so, how connect device after closing app without call cancelperipheralconnection? @ time, must go setting app, forget device connect again.

thanks all.

make sure calling [centralmanager retrieveconnectedperipheralswithservices:servicesuuid]; , connectperipheral after central manager state delegate method returns cbcentralmanagerstateconnected. if attempt connection peripheral before central manager has been initialized, not connect.


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