Ionic 4 - 未处理的承诺拒绝：错误状态 404：找不到应用程序

Question

我不确定是什么原因导致我最初启动 Ionic 4 聊天应用程序时出现此错误。

Failed to load resource: the server responded with a status of 404 ()
polyfills.js:3040 Unhandled Promise rejection: Error Status 404: App not found ; Zone: <root> ; Task: Promise.then ; Value: Error: Error Status 404: App not found
    at IonicDeployImpl.<anonymous> (/plugins/cordova-plugin-ionic/dist/common.js:291)
    at step (/plugins/cordova-plugin-ionic/dist/common.js:37)
    at Object.next (/plugins/cordova-plugin-ionic/dist/common.js:18)
    at fulfilled (/plugins/cordova-plugin-ionic/dist/common.js:9)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke (polyfills.js:2749)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.run (polyfills.js:2508)
    at polyfills.js:3247
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (polyfills.js:2781)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (polyfills.js:2553)
    at drainMicroTaskQueue (polyfills.js:2959) Error: Error Status 404: App not found
    at IonicDeployImpl.<anonymous> (http://localhost/plugins/cordova-plugin-ionic/dist/common.js:291:35)
    at step (http://localhost/plugins/cordova-plugin-ionic/dist/common.js:37:23)
    at Object.next (http://localhost/plugins/cordova-plugin-ionic/dist/common.js:18:53)
    at fulfilled (http://localhost/plugins/cordova-plugin-ionic/dist/common.js:9:58)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke (http://localhost/polyfills.js:2749:26)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.run (http://localhost/polyfills.js:2508:43)
    at http://localhost/polyfills.js:3247:34
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (http://localhost/polyfills.js:2781:31)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (http://localhost/polyfills.js:2553:47)
    at drainMicroTaskQueue (http://localhost/polyfills.js:2959:35)

我已经搜索过类似的错误，但没有一个与 Ionic 4 相关。该应用程序可以正常运行，因此我不确定是什么原因造成的。有一个问题，我正在尝试推送通知，因此当点击数据时，它将导航到聊天页面。那部分不起作用，我认为这可能是原因。

任何帮助将不胜感激。

Answer 1

我在升级到 Ionic 5 后最近遇到了这个问题。我通过以下几个步骤解决了这个问题 -

1. 根据文档设置cordova-plugin-ionic。例如，

更新后的 package.json 看起来像 -

      "cordova-plugin-ionic": {
        "APP_ID": "cabbdf31",
        "CHANNEL_NAME": "Master",
        "UPDATE_METHOD": "background",
        "MAX_STORE": "2",
        "MIN_BACKGROUND_DURATION": "30",
        "UPDATE_API": "https://api.ionicjs.com"
      },

然后将<preference name="DisableDeploy" value="true" /> 添加到config.xml。

1. 我还安装了最新的 CL 并将其配置为使用“pro”。

npm i -g @ionic/cli

ionic config set backend pro -g