[英]Electron: X is not a fuction >>> (Callback using ipcrenderer / ipcmain)
問題
我正在使用Promise(s)在加載庫時獲得回調。 每個promise通過ipcRenderer向ipcMain發送一條消息,並包含一個回調函數。
回調函數按預期調用,但它顯示錯誤:“Succes不是函數”(請查看以下代碼)。
窗戶:
function loadLibrary() {
loadLibraryExtension('Database Manager', 'db').then(() => {
return loadLibraryExtension('Path Extesnion', 'path');
}).then(() => {
return loadLibraryExtension('Excel Extension', 'excel4node');
}).then(() => {
return loadLibraryExtension('Auto updater', 'autoupdater');
}).then(() => {
onLibrariesLoaded();
});
}
var loadLibraryExtension = (status, library) => {
return new Promise(function (resolve, reject) {
$('#current-load').html(status);
ipcRenderer.send('load',
library,
resolve(),
reject()
);
});
}
主要過程:
var db;
var path;
var excel;
var autoUpdater;
var load = {
'db': () => { db = require('./dbmanager.js'); },
'path': () => { path = require('path'); },
'excel4node': () => { excel = require('excel4node'); },
'autoupdater': () => {
autoUpdater = require('electron-updater');
autoUpdater.autoDownload = false;
autoUpdater.autoInstallOnAppQuit = false;
}
}
ipcMain.on('load', function (event, library, succes, error) {
try {
load[library]();
} catch (err) {
Error(err);
error(err);
return;
}
succes();
});
我不希望出現任何錯誤,但我不斷得到
TypeError: succes is not a function
at EventEmitter.<anonymous> (C:\git\library-system\src\main.js:40:3)
at EventEmitter.emit (events.js:194:13)
at WebContents.<anonymous> (C:\git\library-system\node_modules\electron\dist\resources\electron.asar\browser\api\web-contents.js:390:13)
at WebContents.emit (events.js:194:13)
TypeError: succes is not a function
at EventEmitter.<anonymous> (C:\git\library-system\src\main.js:40:3)
at EventEmitter.emit (events.js:194:13)
at WebContents.<anonymous> (C:\git\library-system\node_modules\electron\dist\resources\electron.asar\browser\api\web-contents.js:390:13)
at WebContents.emit (events.js:194:13)
TypeError: succes is not a function
at EventEmitter.<anonymous> (C:\git\library-system\src\main.js:40:3)
at EventEmitter.emit (events.js:194:13)
at WebContents.<anonymous> (C:\git\library-system\node_modules\electron\dist\resources\electron.asar\browser\api\web-contents.js:390:13)
at WebContents.emit (events.js:194:13)
TypeError: succes is not a function
at EventEmitter.<anonymous> (C:\git\library-system\src\main.js:40:3)
at EventEmitter.emit (events.js:194:13)
at WebContents.<anonymous> (C:\git\library-system\node_modules\electron\dist\resources\electron.asar\browser\api\web-contents.js:390:13)
at WebContents.emit (events.js:194:13)
您正在渲染器中發送args
ipcRenderer.send('load', library, resolve(), reject());
並嘗試在主要過程中接收
function (event, library, succes, error) {...
首先,您發送了resolve()
,它不是函數的開頭。 Promise.resolve()返回Promise,而不是函數。
其次,Electron IPC的設計不允許發送不可序列化的值。 簡而言之,您無法發送函數並在其他過程中執行它。 您應該通過主進程中的webContents.send
或event.sender.send
將信號發送回渲染器,然后讓渲染器進程解析進程中的承諾。
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