点击事件
<div class="orcodebtn" @click="downhander(type)">保存二维码至本地相册</div>
图片路径
data(){
return {
orcode:require('./images/orcode2.jpg') //图片地址要require
}
},
js 代码
downhander(){
this.downloadImg(this.orcode,'pic');
},
downloadImg(imgsrc, name){
var image = new Image();
// 解决跨域 Canvas 污染问题
image.setAttribute("crossOrigin", "anonymous");
image.onload = function() {
var canvas = document.createElement("canvas");
canvas.width = image.width;
canvas.height = image.height;
var context = canvas.getContext("2d");
context.drawImage(image, 0, 0, image.width, image.height);
var url = canvas.toDataURL(); //得到图片的base64编码数据
console.log(url)
var a = document.createElement("a"); // 生成一个a元素
var event = new MouseEvent("click"); // 创建一个单击事件
a.download = name || "photo"; // 设置图片名称
a.href = url; // 将生成的URL设置为a.href属性
a.dispatchEvent(event); // 触发a的单击事件
};
image.src = imgsrc;
},