将 require 与 Typescript 和 Expo 一起使用时获得 "Invalid call"

Question

我正在尝试在使用 expo-cli 创建的 react-native 应用程序中播放一些音频。

代码是用 typescript 编写的，违规代码如下所示，取自 expo.io documentation:

import * as React from 'react'
import { WorkoutComponent } from "./WorkoutExecutor";
import { Audio } from 'expo';

export default class AudioPlayer {

    private async playAudio(fileName: string) {
        console.log("Playing Audio: " + fileName);
        const soundFile = './assets/sounds/' + fileName + '.mp3';
        try {
            const { sound: soundObject, status } = await Audio.Sound.createAsync(
              require(soundFile),
              { shouldPlay: true }
            );
            // Your sound is playing!
          } catch (error) {
              console.log(error);
            // An error occurred!
          }

    }
[...]
}

当应用程序加载时，它会出现以下错误，甚至在它到达屏幕之前就出现了声音

[...]\src\AudioPlayer.ts:Invalid call at line 13: require(soundFile)

我知道 coe 示例是 javascript 而不是打字稿，但我错过了什么？

我的 tsconfig.json 是 expo typescript 示例中的那个，看起来像这样

{
  "compilerOptions": {
    "baseUrl": "./src",
    "esModuleInterop": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "importHelpers": true,
    "jsx": "react-native",
    "module": "es2015",
    "moduleResolution": "node",
    "noEmitHelpers": true,
    "noImplicitReturns": true,
    "noUnusedLocals": true,
    // Using the type definitions in @types/expo becuase they are still better than the ones provided by expo. See SvgScreen.tsx and SystemFontsScreen.tsx.
    "paths": {
      "expo": [
        "../node_modules/@types/expo",
        "../node_modules/expo"
      ],
    },
    "skipLibCheck": true,
    "strict": true,
    "target": "es2017"
  },
  "exclude": [
    "node_modules"
  ]
}

Answer 1

我通过 Twitter 获得了帮助，问题是 require() 不适用于动态值。这也解释了为什么错误甚至在应用程序加载之前就发生了，因为它试图在构建或加载时而不是像我想象的那样在运行时解析 require。

Answer 2

我用

修复了它

import song from "./path_to_song/song.mp3"

Answer 3

import * as React from 'react'
import { WorkoutComponent } from "./WorkoutExecutor";
import { Audio } from 'expo';

const fileA = require('path/to/sound/file.mp3');
const fileB = require('path/to/sound/file2.mp3');

export default class AudioPlayer {

    private async playAudio(fileName: string) {
       if (fileName == 'A') {
           var soundFile = fileA;
       } else {
           var soundFile = fileB;
       }
       try {
          const { sound: soundObject, status } = await Audio.Sound.createAsync(
          soundFile,
          { shouldPlay: true }
        );
        // Your sound is playing!
      } catch (error) {
          console.log(error);
        // An error occurred!
      }

}
[...]
}

将 require 与 Typescript 和 Expo 一起使用时获得 "Invalid call"

Getting "Invalid call" when using require with Typescript and Expo

require

typescript

react-native

expo