无法转换“ AnyClass”类型的值

Question

我对以下代码中的错误有疑问。

  

错误：   无法将类型“ AnyClass”（也称为“ AnyObject.Type”）的值转换为   预期的参数类型“ [AnyClass]”（又名“数组”）

代码：

func receivedData( data: Data, from peer: MCPeerID) {

    if let unarchived = try? NSKeyedUnarchiver.unarchivedObject(ofClasses: ARWorldMap.classForKeyedArchiver()!, from: data), // error is here

       let worldMap = unarchived as? ARWorldMap {
        showAlert()
        // Run the session with the received world map.
        let configuration = ARWorldTrackingConfiguration()
        configuration.planeDetection = .horizontal
        configuration.initialWorldMap = worldMap
        sceneView.session.run(configuration, options: [.resetTracking, .removeExistingAnchors])

        // Remember who provided the map for showing UI feedback.
        mapProvider = peer
    }
    else
        if let unarchived = try? NSKeyedUnarchiver.unarchivedObject(ofClasses: ARAnchor.classForKeyedUnarchiver()!, from: data), // and here
            let anchor = unarchived as? ARAnchor {

            sceneView.session.add(anchor: anchor)
            let node = loadObject()
            node.position = SCNVector3.positionFromTransform(anchor.transform)
            sceneView.scene.rootNode.addChildNode(node)
        }
        else {
            print("unknown data recieved from \(peer)")
    }
}