reactjs - preload.ts中的contextBridge.exposeInMainWorld : ipcRenderer receives the message from main. ts，但渲染器无法获取它

Question

在一个Electron-React-Typescript应用程序中，我设法在预加载中通过contextBridge.exposeInMainWorld将消息从渲染器进程发送到main，但是在返回的过程中，来自main的处理后的输出实际上通过了thrugh并到达了preload.ts，但是它没有无法到达渲染器进程。
这一定是真正的“愚蠢”，但我不知道什么是“罪魁祸首”。所以，请问您的帮助。
preload.ts:

const {
  contextBridge,
  ipcRenderer
} = require("electron")


contextBridge.exposeInMainWorld(
  "api", {
      send: (channel, data) => {
          ipcRenderer.invoke(channel, data).catch(e => console.log(e))
      },
      receive: (channel, func) => {
        ipcRenderer.on(channel, (event, ...args) => func(...args))
        //ipcRenderer.on(channel, (event, ...args) => {
          //console.log("ipcRenderer.on-args: ", args);
        //});
      }
)

index.d.ts:

declare interface Window {
    api: {
      send: (channel: string, ...arg: any) => void;
      receive: (channel: string, func: (event: any, ...arg: any) => void) => void;
    }
}

main.ts:

ipcMain.handle("path-to-url", (IpcMainEvent, path) => {
  console.log("received a request from viewerDemo");
  if (mainWindow) {
    let urlified = url.pathToFileURL(path);
    console.log("urlified = url.pathToFileURL(path) : ", urlified);
    console.log("urlified.href= ", urlified.href);
    console.log("urlified.pathname= ", url.pathToFileURL(path).pathname);
    mainWindow.webContents.on("dom-ready", () => {
      mainWindow.webContents.send("path-to-url", "ohhhhhhhhhhhhhhhh");
      mainWindow.webContents.send("path-to-url", url.pathToFileURL(path).pathname);
    });
  }
});

渲染器进程(数据无法正确显示!):
viewerDemo.tsx

import * as React from 'react';
import Viewer from 'react-viewer';

let path_1 = './images/natural-scene.jpeg';
let url_path;

const pathToUrlFunc = (path): string => {
  console.log("pathToUrlFunc called");
  window.api.send("path-to-url", path);
  let urlPath;
  window.api.receive("path-to-url", (event, args) => {
    console.log("window.api.receive called!");
    console.log("window.api.receive-args[0]: ", args[0]);
    urlPath = args[0];
  });
  return urlPath;
}

function ViewerDemo() {
  const [ visible, setVisible ] = React.useState(false);

  let urlpath = pathToUrlFunc(path_1);
  console.log("urlpath: ", urlpath);

  return (
    <div>
      <button onClick={() => { setVisible(true); } }>show</button>
      <Viewer
      visible={visible}
      onClose={() => { setVisible(false); } }
      images={[{src: 'https://www.fotolip.com/wp-content/uploads/2016/05/Nature-Scenes-
21.jpg', alt: ''}]}
      //images={[{src: urlpath, alt: ''}]}

      />
    </div>
  );
}

export default ViewerDemo;

在主要我得到: path received from main: ./images/natural-scene.jpeg而从主返回渲染器的方式是: Cannot read property '0' of undefined
如果在api的“接收”部分的contextBridge.exposeInMainWorld中，我将放置:

  receive: (channel, func) => {
    //ipcRenderer.on(channel, (event, ...args) => func(...args))
    ipcRenderer.on(channel, (event, ...args) => {
      console.log("ipcRenderer.on-args: ", args);
    });
  }

我再也没有收到该错误，在preload.ts中出现了来自main.ts的正确消息，但渲染器进程仍未得到它:

Answer 1

您可能现在已经找到了答案，但这只是为了以防万一，并且可以使遇到此问题的任何人受益。尽管我无法运行代码来证明这是问题所在，但我认为这是预加载接收功能的问题:
ipcRenderer.on代理方法仅使用args参数的传播调用“func”处理程序。但是在viewerDemo.tsx中，传递给“receive”的处理程序方法被称为“func”，它期望两个参数“event”和“args”。因此，您在args中传递的单个参数可能会在“事件”参数中显示为单个元素数组。
为了检验该理论并希望解决此问题，请使方法一致。您可以在以下代码中的viewerDemo.tsx中的处理程序中更改此行:window.api.receive("path-to-url", (event, args) => {到window.api.receive("path-to-url", (args) => {或者在preload.ts中更改这一行ipcRenderer.on(channel, (event, ...args) => func(...args))到ipcRenderer.on(channel, (event, ...args) => func(event, ...args))两者都应解决该问题。