管理多个窗口
学习创建、协调多个 BrowserWindow 实例并在它们之间通信。这项核心技能直接建立在主进程和 IPC 基础之上。
管理多个窗口 是 CoddyKit 上的免费 Electron Desktop App Development 课时。 这是第 4 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Electron Desktop App Development 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Electron Desktop App Development 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
Beyond a Single Window
Real desktop apps often need multiple windows: a main editor, a settings panel, a preview. The main process owns and tracks all of them.
Creating a Window
Each window is a BrowserWindow instance created in the main process.
const { BrowserWindow } = require('electron');
function createWindow() {
const win = new BrowserWindow({ width: 600, height: 400 });
win.loadFile('index.html');
return win;
}Keeping References
If you do not keep a reference, the window can be garbage collected. Store windows in a variable or array.
let windows = [];
function track(win) {
windows.push(win);
win.on('closed', () => {
windows = windows.filter(w => w !== win);
});
}Parent and Child Windows
You can make one window the parent of another. Child windows move with the parent and can be modal.
new BrowserWindow({
parent: mainWindow,
modal: true,
width: 300,
height: 200
});Window-to-Window Messaging
Windows do not share memory. They communicate through the main process using IPC as a relay.
ipcMain.on('to-other', (e, msg) => {
otherWindow.webContents.send('from-main', msg);
});Identifying Windows
Each window has a unique id. Use it to target a specific window when relaying messages.
function findWindow(id, list) {
return list.find(w => w.id === id);
}
console.log(findWindow(2, [{ id: 1 }, { id: 2 }]));Showing Windows Gracefully
Avoid a white flash by creating windows hidden and showing them once ready.
const win = new BrowserWindow({ show: false });
win.once('ready-to-show', () => win.show());Managing Focus
Use focus() and the blur event to know which window the user is interacting with, useful for save prompts.
Closing and Cleanup
Listen for close to prompt for unsaved changes, and closed to release references.
win.on('close', (e) => {
if (hasUnsaved) {
e.preventDefault();
}
});Single Instance Lock
Use app.requestSingleInstanceLock() to focus the existing window instead of opening duplicates.
Coordinating State
Centralize shared state in the main process so every window reads from one source of truth, avoiding drift.
Quick Check
Test your window management knowledge.
Recap
You learned to create and track multiple BrowserWindow instances, manage parent/child relationships, relay messages via the main process, and clean up references properly.
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常见问题解答
「管理多个窗口」课时是免费的吗？
是的 — 「管理多个窗口」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Electron Desktop App Development 课程的其余内容，请升级到 CoddyKit PRO。 Electron Desktop App Development 课程共包含 4 节课。
「管理多个窗口」这节课中我会学到什么？
学习创建、协调多个 BrowserWindow 实例并在它们之间通信。这项核心技能直接建立在主进程和 IPC 基础之上。 你通过在浏览器中直接运行的动手代码来练习 Electron Desktop App Development，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 Electron Desktop App Development 需要有经验吗？
无需任何先前经验。CoddyKit 上的 Electron Desktop App Development 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 4 节课，共 4 节。
「管理多个窗口」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 Electron Desktop App Development 课中编写并运行代码吗？
能。每节 Electron Desktop App Development 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。