electron 主进程和渲染进程通信

- 日理万妓 2021-07-24 11:05 600阅读 0赞

1、主进程引入
    	const {ipcMain} = require('electron')
    
    2、渲染进程引入
    	const {ipcRenderer}=require('electron');
    	
    3、通信
    	(1)两个进程互相通信
    		主进程:
    		 接收:ipcMain.on('主进程名‘,(event,ans)=>{
    		    ans为渲染进程发送的数据
    		   	
    		   	发送：
    		    event.reply('渲染进程名',数据);
    		  })
    		  
    		  
    		渲染进程:
    		  
    		  接收:ipcRenderer.on('渲染进程名',(event,ans)=>{
    			ans为主进程发送的数据
    		  })
    		  发送:ipcRenderer.send("主线程名",数据);
    			
    		
    	(2)主进程->渲染进程
    		主线程发送:mainWindow.webContents.send('渲染进程名',数据)
    			 直接发送速度太快,子进程还未创建,接收不到,通过定时器延迟触发
    		渲染进程接收:ipcRenderer.on('渲染进程名',(event,ans)=>{...})

[ipcMain][]  
[ipcRenderer][]

代码示例:  
主进程:

// Modules to control application life and create native browser window
    const { app, BrowserWindow,BrowserView,globalShortcut,ipcMain} = require('electron')
    const path = require('path')
    
    function createWindow () { 
      // Create the browser window.
      const mainWindow = new BrowserWindow({ 
        width: 800,
        height: 600,
        //弹出的窗口有无边框,默认为有
        // frame:false,
        show:false,
        backgroundColor:'#586148',
        webPreferences: { 
          preload: path.join(__dirname, 'preload.js'),
          nodeIntegration:true,
          webviewTag:true
        },
      })
    
      // and load the index.html of the app.
      mainWindow.loadFile('index.html')
      mainWindow.webContents.on("did-finish-load",()=>{ 
          
      })
      mainWindow.webContents.on('dom-ready',()=>{ 
       
      })
      mainWindow.once('ready-to-show',function(){ 
        mainWindow.show();
      })
    
      setTimeout(()=>{ 
        mainWindow.webContents.send('fromMain','哇啦啦')
      },2000)
      
      //接收渲染进程
      ipcMain.on('send',(event,ans)=>{ 
    
        console.log('主进程接收'+ans);
        //发送渲染进程
        event.reply('sendToRender','来自主进程');
      })
    
    
    
    
      // 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.whenReady().then(createWindow)
    app.on('ready',()=>{ 
    
      createWindow();
    
    
    });
    
    // Quit when all windows are closed.
    app.on('window-all-closed', function () { 
      // On macOS 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', function () { 
      // On macOS 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 require them here.

渲染进程:

const { ipcRenderer}=require('electron');
    
    var view=document.querySelector('.wb');
    var sp=document.querySelector('.sp');
    var btn=document.querySelector('.obtn');
    var gbtn=document.querySelector('.gbtn');
    var cbtn=document.querySelector('.cbtn');
    var dbtn=document.querySelector('.dbtn');
    
    var proxy;
    
    btn.onclick=function(){ 
        //发送给主进程
        ipcRenderer.send("send",'来自渲染进程');
    }
    //接收主进程
    ipcRenderer.on('sendToRender',(event,ans)=>{ 
        console.log(ans);
    })
    
    ipcRenderer.on('fromMain',(event,ans)=>{ 
        console.log(ans);
    })
    
    gbtn.onclick=function(){ 
    
    }
    
    cbtn.onclick=function()
    { 
    
    }
    
    dbtn.onclick=function()
    { 
    
    }

[ipcMain]: https://www.electronjs.org/docs/api/ipc-main
[ipcRenderer]: https://www.electronjs.org/docs/api/ipc-renderer