如何防止 Electron 中的多个实例 [英] How to prevent multiple instances in Electron
本文介绍了如何防止 Electron 中的多个实例的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我不知道这是否可能,但我不妨给它一个机会并询问.我正在做一个 Electron 应用程序,我想知道一次是否可以有不超过一个实例.
I do not know if this is possible but I might as well give it a chance and ask. I'm doing an Electron app and I'd like to know if it is possible to have no more than a single instance at a time.
我已经找到了这个 gist,但我不确定要不要使用它.有人可以分享一个更好的想法吗?
I have found this gist but I'm not sure hot to use it. Can someone shed some light of share a better idea ?
var preventMultipleInstances = function(window) {
var socket = (process.platform === 'win32') ? '\\.\pipe\myapp-sock' : path.join(os.tmpdir(), 'myapp.sock');
net.connect({path: socket}, function () {
var errorMessage = 'Another instance of ' + pjson.productName + ' is already running. Only one instance of the app can be open at a time.'
dialog.showMessageBox(window, {'type': 'error', message: errorMessage, buttons: ['OK']}, function() {
window.destroy()
})
}).on('error', function (err) {
if (process.platform !== 'win32') {
// try to unlink older socket if it exists, if it doesn't,
// ignore ENOENT errors
try {
fs.unlinkSync(socket);
} catch (e) {
if (e.code !== 'ENOENT') {
throw e;
}
}
}
net.createServer(function (connection) {}).listen(socket);;
});
}
推荐答案
现在有一个新的 API:requestSingleInstanceLock
There is a new API now: requestSingleInstanceLock
const { app } = require('electron')
let myWindow = null
const gotTheLock = app.requestSingleInstanceLock()
if (!gotTheLock) {
app.quit()
} else {
app.on('second-instance', (event, commandLine, workingDirectory) => {
// Someone tried to run a second instance, we should focus our window.
if (myWindow) {
if (myWindow.isMinimized()) myWindow.restore()
myWindow.focus()
}
})
// Create myWindow, load the rest of the app, etc...
app.on('ready', () => {
})
}
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