Pass data from locationmanager(..didrangbeacons) to collectionview(…cellforitemat)

Question

I have to update collectionview every time that locationManager(_ manager: CLLocationManager, didRangeBeacons beacons: [CLBeacon], in region: CLBeaconRegion) do a cycle, so i thought to pass beacons variables from it to collectionview, how con i do it without using global variables. Here's the code:

 func locationManager(_ manager: CLLocationManager, didRangeBeacons beacons: [CLBeacon], in region: CLBeaconRegion) {
    if !beacons.isEmpty {
        //do things
    }
    else{
        //do other things
    }
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! buttonBeaconsView

    //i want to use beacons data here


    //cell.backgroundColor = UIColor(white: 1, alpha: 0.8)
    //cell.createButton()
    //cell.layer.masksToBounds = true
    return cell
}

Thanks in advance

Answer 1

Make your view controller serve as the delegate of the location manager. The call to locationManager(_:didRangeBeacons:in:) will be made to your view controller. It can then update an INSTANCE variable (not a global variable) to hold the new list of beacon information and tell the collection view to update it's contents.