小编Alo*_*ali的帖子

我正在react-navigation-drawer从 React 导航库实现。但面临与标题相关的问题。标题栏未显示在任何屏幕中。

这是我的 App.js

import React from "react";
import { StyleSheet, ScrollView, View } from "react-native";
//import DrawerNavigator from "./navigation/DrawerNavigator";
import { Platform, Dimensions } from "react-native";
import { createAppContainer } from "react-navigation";
import { createDrawerNavigator } from "react-navigation-drawer";
import Home from "./components/home";
import Contact from "./components/contact";

const WIDTH = Dimensions.get("window").width;
const RouteConfigs = {
  Home: {
    screen: Home
  },
  Contact: {
    screen: Contact
  }
};
const DrawerNavigatorConfig = {
  drawerWidth: WIDTH * 0.75,
  drawerType: "both",
  initialRouteName: …

我正在开发一个有角度的 PWA 应用程序。所以我添加了一个 npm 包ng add @angular/pwa。它添加成功，没有错误。

生成的清单工作正常。但我正面临服务工作者的问题。当应用程序上线时，它会存储所有缓存（请参阅附件），但每当应用程序下线时，它会显示错误 - HTTP ERROR 504，而不是服务于来自 Service Worker 的请求

   {
    "index": "/index.html",
    "assetGroups": [
      {
        "name": "app",
        "installMode": "prefetch",
        "resources": {
          "files": ["assets/images/favicon.ico", "/index.html", "/*.css", "/*.js"]
        }
      },
      {
        "name": "assets",
        "installMode": "lazy",
        "updateMode": "prefetch",
        "resources": {
          "files": [
            "/assets/**",
            "/*.(eot|svg|cur|jpg|png|webp|gif|otf|ttf|woff|woff2|ani)"
          ]
        }
      }
    ]
  }