使用electron实现满屏爱心的效果（代码示例）

图片被压缩了 看起来有点难看

主进程代码

import {BrowserWindow, app, ipcMain} from 'electron'

createWindow();

ipcMain.on('quitApp', () => {
    app.quit();
});

function createWindow() {

    const loginURL = process.env.NODE_ENV === 'development' ? `http://localhost:9080` : `file://${__dirname}/index.html`;
    const win = new BrowserWindow({

        alwaysOnTop: true,
        modal: true,
        width: 1200,
        height: 6500,
        frame: false,
        show: false,
        darkTheme: true,
        resizable: false,
        minimizable: false,
        maximizable: false,
        transparent: true,
        type: 'toolbar',
        webPreferences: {
            devTools: false,
        }
    });
    win.loadURL(loginURL);
    win.once('ready-to-show', () => {
        win.show();
    });
}

渲染进程代码

界面代码

<template>
    <div style="position: absolute;width: 95%;height: 95%;border-radius: 10px;-webkit-app-region: drag">
        <canvas ref="drawHeart" id="drawHeart"></canvas>
    </div>
</template>

js代码

 mounted() {
            var hearts = [];
            var canvas = this.$refs.drawHeart;
            var wW = 1920;
            var wH = 1040;
            // 创建画布
            var ctx = canvas.getContext('2d');
            // 创建图片对象
            var heartImage = new Image();
            heartImage.src = img;
            var num = 100;

            init();

            window.addEventListener('resize', function(){
                wW = window.innerWidth;
                wH = window.innerHeight;
            });
            // 初始化画布大小
            function init(){
                canvas.width = wW;
                canvas.height = wH;
                for(var i = 0; i < num; i++){
                    hearts.push(new Heart(i%5));
                }
                requestAnimationFrame(render);
            }

            function getColor(){
                var val = Math.random() * 10;
                if(val > 0 && val <= 1){
                    return '#00f';
                } else if(val > 1 && val <= 2){
                    return '#f00';
                } else if(val > 2 && val <= 3){
                    return '#0f0';
                } else if(val > 3 && val <= 4){
                    return '#368';
                } else if(val > 4 && val <= 5){
                    return '#666';
                } else if(val > 5 && val <= 6){
                    return '#333';
                } else if(val > 6 && val <= 7){
                    return '#f50';
                } else if(val > 7 && val <= 8){
                    return '#e96d5b';
                } else if(val > 8 && val <= 9){
                    return '#5be9e9';
                } else {
                    return '#d41d50';
                }
            }

            function getText(){
                var val = Math.random() * 10;
                if(val > 1 && val <= 3){
                    return '爱你一辈子';
                } else if(val > 3 && val <= 5){
                    return '感谢你';
                } else if(val > 5 && val <= 8){
                    return '喜欢你';
                } else{
                    return 'I Love You';
                }
            }

            function Heart(type){
                this.type = type;
                // 初始化生成范围
                this.x = Math.random() * wW;
                this.y = Math.random() * wH;

                this.opacity = Math.random() * .5 + .5;

                // 偏移量
                this.vel = {
                    x: (Math.random() - .5) * 5,
                    y: (Math.random() - .5) * 5
                }

                this.initialW = wW * .5;
                this.initialH = wH * .5;
                // 缩放比例
                this.targetScale = Math.random() * .15 + .02; // 最小0.02
                this.scale = Math.random() * this.targetScale;

                // 文字位置
                this.fx = Math.random() * wW;
                this.fy = Math.random() * wH;
                this.fs = Math.random() * 10;
                this.text = getText();

                this.fvel = {
                    x: (Math.random() - .5) * 5,
                    y: (Math.random() - .5) * 5,
                    f: (Math.random() - .5) * 2
                }
            }

            Heart.prototype.draw = function(){
                ctx.save();
                ctx.globalAlpha = this.opacity;
                ctx.drawImage(heartImage, this.x, this.y, this.width, this.height);
                ctx.scale(this.scale + 1, this.scale + 1);
                if(!this.type){
                    // 设置文字属性
                    ctx.fillStyle = getColor();
                    ctx.font = 'italic ' + this.fs + 'px sans-serif';
                    // 填充字符串
                    ctx.fillText(this.text, this.fx, this.fy);
                }
                ctx.restore();
            }
            Heart.prototype.update = function(){
                this.x += this.vel.x;
                this.y += this.vel.y;

                if(this.x - this.width > wW || this.x + this.width < 0){
                    // 重新初始化位置
                    this.scale = 0;
                    this.x = Math.random() * wW;
                    this.y = Math.random() * wH;
                }
                if(this.y - this.height > wH || this.y + this.height < 0){
                    // 重新初始化位置
                    this.scale = 0;
                    this.x = Math.random() * wW;
                    this.y = Math.random() * wH;
                }

                // 放大
                this.scale += (this.targetScale - this.scale) * .1;
                this.height = this.scale * this.initialH;
                this.width = this.height * 1.4;

                // -----文字-----
                this.fx += this.fvel.x;
                this.fy += this.fvel.y;
                this.fs += this.fvel.f;

                if(this.fs > 50){
                    this.fs = 2;
                }

                if(this.fx - this.fs > wW || this.fx + this.fs < 0){
                    // 重新初始化位置
                    this.fx = Math.random() * wW;
                    this.fy = Math.random() * wH;
                }
                if(this.fy - this.fs > wH || this.fy + this.fs < 0){
                    // 重新初始化位置
                    this.fx = Math.random() * wW;
                    this.fy = Math.random() * wH;
                }
            }

            function render(){
                ctx.clearRect(0, 0, wW, wH);
                for(var i = 0; i < hearts.length; i++){
                    hearts[i].draw();
                    hearts[i].update();
                }
                requestAnimationFrame(render);
            }

        }

扩展功能

全屏展示

const size = screen.getPrimaryDisplay().workAreaSize;   //获取显示器的宽高
win.setSet(size.width size.height);
win.setPosition(0,0);

这样就会让窗口全屏 但是有一个问题 就是这样做界面不会正确响应 我们可以使用进程通信去解决

win.webContents.sen('windowSize',size);

之后再主进程中监听就行了

窗口点击穿透

以上代码会有一个问题 就是一旦运行 就不能关闭了

win.setIgnoreMouseEvents(true) 就可以让界面只做展示使用 鼠标可以点击你窗口的任意区域

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