// 将文件转化为base64
fileToBase64(file) {
const reader = new FileReader();
reader.readAsDataURL(file);
reader.onload = (e) => {
console.log(e.target.result);
return e.target.result
};
},
// 将base64转化为文件
base64ToFile(base) {
const arr = base.split(',');
const mime = arr[0].match(/:(.*?);/)[1];
const bstr = atob(arr[1]);
let n = bstr.length;
const u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
if (window.navigator.msSaveBlob) {
// for ie 10 and later
try {
const blobObject = new Blob([u8arr], { type: mime });
window.navigator.msSaveBlob(blobObject, 'aaa.xls');
} catch (e) {
console.log(e);
}
} else {
const url = window.URL.createObjectURL(new Blob([u8arr], { type: mime }));
const link = document.createElement('a');
link.href = url;
link.setAttribute('download', 'aaa.xls');
document.body.appendChild(link);
link.click();
document.body.removeChild(link); // 下载完成移除元素
window.URL.revokeObjectURL(url); // 释放掉blob对象
}
},
