如何通过在watchOS call中发起调用从iOS app拉取数据？

import WatchConnectivity

class ExtensionDelegate: NSObject, WKExtensionDelegate, WCSessionDelegate {
    func applicationDidFinishLaunching() {
        if WCSession.isSupported() {
            let session = WCSession.default
            session.delegate = self
            session.activate()
        }
    }
}

import WatchConnectivity

class AppDelegate: UIResponder, UIApplicationDelegate, WCSessionDelegate {
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        if WCSession.isSupported() {
            let session = WCSession.default
            session.delegate = self
            session.activate()
        }
        return true
    }
}

if WCSession.default.isReachable {
    let message = ["request": "data"]
    WCSession.default.sendMessage(message, replyHandler: { reply in
        // 处理iOS app返回的数据
        if let data = reply["data"] as? [String: Any] {
            // 处理数据
        }
    }, errorHandler: { error in
        // 处理错误
    })
}

func session(_ session: WCSession, didReceiveMessage message: [String: Any], replyHandler: @escaping ([String: Any]) -> Void) {
    if let request = message["request"] as? String, request == "data" {
        // 处理watchOS app的请求并返回数据
        let data = ["data": "example data"]
        replyHandler(data)
    }
}