call未连接但call kit ui在后台运行时如何关闭call kit

import CallKit

class AppDelegate: UIResponder, UIApplicationDelegate, CXProviderDelegate {
    // ...
}

class AppDelegate: UIResponder, UIApplicationDelegate, CXProviderDelegate {
    var provider: CXProvider?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // 创建CXProvider对象
        provider = CXProvider(configuration: CXProviderConfiguration(localizedName: "Your App Name"))
        provider?.setDelegate(self, queue: nil)
        
        // ...
        
        return true
    }
    
    // ...
}

extension AppDelegate: CXProviderDelegate {
    func providerDidReset(_ provider: CXProvider) {
        // CallKit UI被关闭时的处理逻辑
        // 在这里可以执行一些清理操作或者停止音视频通话
    }
    
    // ...
}

// 关闭CallKit UI
provider?.invalidate()