ios – Fetch iBeacon frame data in app quit state

I have a ble device that transmits custom data in iBeacon frame. I need to capture the data continuously even when the app is quit forcefully. entry exit event does fire randomly and that time data i am able to get it. But its not always. Also i need to get the data always even when i am inside the region of that device.

Below is my code, but its not working. Is it doable or not? any other alternate options?

func startMonitoring(uuidString: String?) {

    let defaultUUIDString = bleUUID
    let uuid: UUID
    if let s = uuidString, let parsed = UUID(uuidString: s) {
        uuid = parsed
    } else if let parsedDefault = UUID(uuidString: defaultUUIDString) {
        uuid = parsedDefault
    } else {
        uuid = UUID()
    }

    let constraint = CLBeaconIdentityConstraint(uuid: uuid)
    let region = CLBeaconRegion(beaconIdentityConstraint: constraint, identifier: "SmartTagRegion")

    region.notifyOnEntry = true
    region.notifyOnExit = true
    region.notifyEntryStateOnDisplay = true

    manager.startMonitoring(for: region)
    manager.requestState(for: region)
    manager.startRangingBeacons(satisfying: constraint)
 }