ios – 我可以在swift中从后台队列中调用静态方法吗？

概述我在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.swiftimport UIKitimport Foundationclass ServerCommunication{ class func getData(url: String, sessionId: String) 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.swiftimport UIKitimport Foundationclass 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？

getData() static class executed multiple times when calling from background queue

#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 vIEwControllerif 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()        })}}

解决方法 您可以使用Closures

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)    })}

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