附代码
copyResImage() {
let that = this
let a = new FileReader();
console.log(that.state.final_img_blob)
a.onload = function (e) {
console.log(e.target.result)
utools.copyImage(e.target.result)
alert("复制图片成功！")
utools.showMainWindow()
}
a.readAsDataURL(that.state.final_img_blob);
}
