分享一波前端二维码生成分案

转载自 SegmentFault

前端生成二维码我们之前使用的是 QRCode.js，我相信大家首选也都是这个。

然后前两天，来需求了，想要实现二维码中间放 logo 的效果。没办法我就上网调研了一番。

• qrcodejs 是不是支持的。

• 支付宝他们就是生成了一个二维码，然后在中心位置又放了个 logo。dom上看是两层，分离的。

• 也有一些插件基于 qrcodejs 封装，支持了特殊效果。

调研结果

https://www.lilnong.top/static/html/qrcode-20200408-jq22-yanshi4094.html 美化版本

image = new Image();
    image.src = `//www.lilnong.top/static/img/avator/avator-0.jpg`;
    image.onload = function(){
        $('#qrcode').erweima({
            mode: 4,
            mSize:20,
            image: image,
            text: 'https://www.lilnong.top'
        });
    }

https://www.lilnong.top/static/html/qrcode-20200408-jq22-yanshi21277.html 普通版本

$("#qrcode").qrcode({
    render: "canvas",
    text: 'https://www.lilnong.top/cors/yanshi21277',
    width : "200", //二维码的宽度
    height : "200", //二维码的高度
    background : "#ffffff", //二维码的后景色
    foreground : "#000000", //二维码的前景色
    src: '//www.lilnong.top/static/img/avator/avator-0.jpg' //二维码中间的图片
});

https://www.lilnong.top/static/html/qrcode-20200408-qart-jq22-jqueryinfo12691.html qart.js插件版本，识别度不高

image = new Image();
    image.src = '//www.lilnong.top/static/img/avator/avator-14.jpg';
    image.width = 100;
    document.body.appendChild(image)
    image.onload = function(){
        new QArt({
            value: 'https://www.lilnong.top/cors/qart/threshold',
            imagePath: '//www.lilnong.top/static/img/avator/avator-14.jpg',
            filter: 'threshold',
            size: 300
        }).make(function (canvas) {
            document.getElementById('qrcode').appendChild(canvas)
        });
        
        new QArt({
            value: 'https://www.lilnong.top/cors/qart/color',
            imagePath: '//www.lilnong.top/static/img/avator/avator-14.jpg',
            filter: 'color',
            size: 300
        }).make(function (canvas) {
            document.getElementById('qrcode').appendChild(canvas)
        });
        new QArt({
            value: 'https://www.lilnong.top/cors/qart/noimagePath',
            imagePath: '',
            filter: 'color',
            size: 300
        }).make(function (canvas) {
            document.getElementById('qrcode').appendChild(canvas)
        });
    }

https://www.lilnong.top/static/html/qrcode-20200408-jq22-yanshi22345.html 高度美化版本，配置复杂，不适用。

qrcode = new QRCode(document.getElementById("qrcode"), {
        text: "https://www.lilnong.top/cors/",
        height: 500,
        codeWidth: 320,
        codeHeight: 320,
        top: 85,
        left: 80,
        materials: {
            border: "https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_border.png",
            eye: "https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_eye.png",
            row4: "https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_row4.png",
            col4: "https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_col3.png",
            row2col3: "https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_row2col3.png",
            row3col2: "https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_row3col2.png",
            col3: ["https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_col3.png", "https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_col3_2.png"],
            row2col2: "https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_row2col2.png",
            corner: "https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_corner.png",
            row2: ["https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_row2.png", "https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_row2_2.png"],
            col2: "https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_col2.png",
            single: ["https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_single.png", "https://www.lilnong.top/static/img/yanshi22345/http___www.jq22.com_demo_erwm201910121055_materials_electron_single_2.png"],
        }
    });

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原文：SegmentFault