downloadIamge(imgsrc, name) { //下载图片地址和图片名 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( "image/png" ); //得到图片的base64编码数据 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; }, downs(){ this .downloadIamge( this .pic.url, 'pic' ) } |