如何在Electron中防止多个实例 [英] How to prevent multiple instances in Electron
本文介绍了如何在Electron中防止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
我不知道这是否可行,但我不妨给它一个机会,问一下。
我正在做一个Electron应用程序,我想知道一次最多只能有一个实例。
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.
I找到了这个要点,但我不确定使用它的热情。有人可以分享一些更好的主意吗?
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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