>我正在按照对话框示例打开文件：https://github.com/electron/electron-api-demos
我从示例中复制了代码。打开文件对话框实际上确实有效，我能够选择一个文件，但无法弄清楚为什么将文件路径发送回渲染器的箭头函数不起作用(控制台.log没有记录任何内容(。
谁能发现问题所在？ 该项目是使用electron-forge开始的，我的操作系统是linux。 谢谢
索引.js
const { app, BrowserWindow, ipcMain, dialog, } = require('electron');
require('electron-reload')(__dirname);
const path = require('path');
// Handle creating/removing shortcuts on Windows when installing/uninstalling.
if (require('electron-squirrel-startup')) { // eslint-disable-line global-require
app.quit();
}
const createWindow = () => {
// Create the browser window.
const mainWindow = new BrowserWindow({
width: 800,
height: 600,
webPreferences: {
nodeIntegration: true
}
});
// and load the index.html of the app.
mainWindow.loadFile(path.join(__dirname, 'index.html'));
// Open the DevTools.
mainWindow.webContents.openDevTools();
};
// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', createWindow);
// Quit when all windows are closed.
app.on('window-all-closed', () => {
// On OS X it is common for applications and their menu bar
// to stay active until the user quits explicitly with Cmd + Q
if (process.platform !== 'darwin') {
app.quit();
}
});
app.on('activate', () => {
// On OS X it's common to re-create a window in the app when the
// dock icon is clicked and there are no other windows open.
if (BrowserWindow.getAllWindows().length === 0) {
createWindow();
}
});
// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and import them here.
ipcMain.on('open-file-dialog', (event) => {
dialog.showOpenDialog(
{
properties: ['openFile',]
},
(files) => {
console.log('ok')
if (files) {
event.sender.send('select-file', files)
}
})
})
索引.html
<!DOCTYPE html>
<html>
<head>
<title>Hello</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<div>
<div>
<button class="demo-button" id="select-directory">Select file</button>
<span class="demo-response" id="selected-file"></span>
</div>
<br><br>
</div>
<script>
const electron = require('electron')
const { ipcRenderer } = electron
const selectDirBtn = document.getElementById('select-directory')
selectDirBtn.addEventListener('click', (event) => {
ipcRenderer.send('open-file-dialog')
})
ipcRenderer.on('select-file', (event, path) => {
console.log(path)
document.getElementById('selected-file').innerHTML = `You selected: ${path}`
})
</script>
</body>
</html>
对话框 API 已随着 Electron 6 的发布而修改。
dialog.showOpenDialog()和其他对话框函数现在返回 promise，不再采用回调函数。还有一些同步对应项以阻塞方式返回选择结果，例如dialog.showOpenDialogSync().
示例用法(在渲染器进程中(
const remote = require("electron").remote
const dialog = remote.dialog
dialog.showOpenDialog(remote.getCurrentWindow(), {
properties: ["openFile", "multiSelections"]
}).then(result => {
if (result.canceled === false) {
console.log("Selected file paths:")
console.log(result.filePaths)
}
}).catch(err => {
console.log(err)
})
截至2020年2月，electron-api-demos使用Electron 5。这就是为什么他们的对话调用代码仍然使用旧形式。