ios – 我可以在swift中从后台队列中调用静态方法吗？

我在ServerCommunication类中有一个静态getData()方法可以从后台队列中调用此方法.

//ServerCommunication.swift

import UIKit
import Foundation


class ServerCommunication
{
      class func getData(url: String,sessionId: String) -> ServerResponse {
            //server communication code goes here
      }
}

func populateData() {
     DispatchQueue.global(qos: .BACkground).async {
           let response = ServerCommunication.getData(url: URL,sessionId: "")
     }
}

任何人都可以解释对线程执行有什么影响或者我可能需要将ServerCommunication类定义为Singleton？

#Edit1更多解释

当我尝试在发生推送通知时打开特定的viewController时发生此问题.我正在使用一个名为FAPanelController的第三方库,它分别接受一个中心,左右viewController.

代码示例：

@available(iOS 10.0,*)
func userNotificationCenter(_ center: UNUserNotificationCenter,didReceive response: UNNotificationResponse,withCompletionHandler completionHandler: @escaping () -> Void) {
//Now I want to open a viewController
if let panel = self.window?.rootViewController as? FAPanelController     
{
    let centerNavVC = storyboard.instantiateViewController(withIdentifier: "HomeViewController") as! UINavigationController
        let vc = centerNavVC.topViewController as! HomeViewController
        panel.center(centerNavVC,afterThat: {
            //HomeViewController has a method populateData() in viewWillAppear()
        })
}
}

class ServerCommunication
{
    class func getData(url: String,sessionId: String,success: @escaping ((_ responSEObject: ServerResponse?) -> Void)) {
        //server communication code goes here
        success(serverData) // serverData is a server response
    }
}

func populateData() {
    ServerCommunication.getData(url: "",sessionId: "",success: { (responsE) in
       // You can handle response here
       print(responsE)
    })
}