图片转bace64方法如下
function getBase64Image(img) {
var dataURL;
var canvas = document.createElement("canvas");
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0, img.width, img.height);
var ext = img.src.substring(img.src.lastIndexOf(".") + 1).toLowerCase();
dataURL = canvas.toDataURL("image/" + ext, 0.5);
return dataURL;
}
在 canvas.toDataURL 时传 quality 参数,不管传几都没有体现出来压缩,传1图片出来是300k ,传0.1出来也是300k
求解