获取本地图片，处理成base64getBase64(url,callback){varcanvas=document.createElement("canvas");//创建一个canvasDOM元素，并设置其宽高与图片相同varctx=canvas.getContext("2d");varimg=新图像；img.crossOrigin='匿名';img.src=网址；console.log(url)img.onload=function(){canvas.height=60;//指定画板的高度，customcanvas.width=60;//指定画板的宽度，customctx.drawImage(img,0,0,60,60);//参数可自定义vardataURL=canvas.toDataURL();callback.call(this,dataURL);//获取Base64编码的回调函数canvas=null;};},调用:shareGame(){this.getBase64('../assets/logo.png',function(base64){console.log(base64)letimage=base64,})},
