Nativescript:如何将HTTP值存储到公共变量

import { Observable } from "tns-core-modules/data/observable";

export const appData = new Observable();

import { HttpClient } from "tns-core-modules/http";

const httpClient = new HttpClient();

httpClient.get("https://api.example.com/data").then((response) => {
    // 将HTTP值存储到公共变量
    appData.set("httpValue", response.content.toString());
}, (error) => {
    console.error(error);
});

import { appData } from "./app";

// 订阅公共变量的改变
appData.on(Observable.propertyChangeEvent, (args) => {
    if (args.propertyName === "httpValue") {
        // 获取最新的HTTP值
        const httpValue = args.value;
        console.log(httpValue);
    }
});