contextBridge.exposeInMainWorld 在 preload.ts 中:ipcRenderer 从 main.ts 接收到消息,但渲染器没有得到它

contextBridge.exposeInMainWorld in preload.ts: ipcRenderer receives the message from main.ts but the renderer doesn't get it

在 Electron-React-Typescript 应用程序中,我设法在预加载时通过 contextBridge.exposeInMainWorld 将消息从渲染器进程发送到主进程,但在返回的路上,从主进程处理的输出实际上通过并到达preload.ts,但未到达渲染器进程。 这一定是真的“愚蠢”的东西,但我不知道“罪魁祸首”是什么。所以,我请求你的帮助。

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(数据未正确显示!):

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;

主要我得到:path received from main: ./images/natural-scene.jpeg 而从主渲染器返回的路上我得到:Cannot read property '0' of undefined

如果在 contextBridge.exposeInMainWorld 中 api 的 'receive' 部分,我输入:

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

我不再收到该错误,在 preload.ts 内出现了来自 main.ts 的正确消息,但渲染器进程仍然没有收到它:

你现在可能已经找到了这个问题的答案,但为了以防万一,为了任何遇到这个问题的人的利益;虽然我无法 运行 代码来证明这是问题所在,但我认为它是预加载接收函数的问题:

ipcRenderer.on 代理方法仅使用 args 参数的传播来调用您的“func”处理程序。但是在 viewerDemo.tsx 中,您传递给“receive”的处理程序方法被称为“func”,需要两个参数“event”和“args”。因此,您在 args 中传递的单个参数可能在“事件”参数中显示为单个元素数组。

为了检验理论并希望解决这个问题,请使方法保持一致。您可以将 viewerDemo.tsx 中的处理程序中的这一行从

更改为

window.api.receive("path-to-url", (event, args) => {

window.api.receive("path-to-url", (args) => {

或在 preload.ts 中更改此行
ipcRenderer.on(channel, (event, ...args) => func(...args))

ipcRenderer.on(channel, (event, ...args) => func(event, ...args))

应该可以解决问题。