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@ -70,29 +70,70 @@ Array.prototype.exchange = function (val1, val2) {
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this.splice(val1, 1, o2);
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this.splice(val2, 1, o1);
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};
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window.utils = {};
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window.utils.downBlob = function (name, blob) {
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var url = window.URL.createObjectURL(blob);
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console.log(url)
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var link = document.createElement('a')
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link.style.display = 'none';
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link.href = url;
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link.setAttribute('download', name)
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document.body.appendChild(link);
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var evt = document.createEvent("MouseEvents");
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evt.initEvent("click", false, false);
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link.dispatchEvent(evt);
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document.body.removeChild(link);
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};
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window.utils.base64toString = function (base64) {
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return window.atob(base64);
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};
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window.utils.base64toBytes = function (base64) {
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var str = window.atob(base64);
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var len = str.length;
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var bytes = new Int8Array(len)
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for (var i = 0; i < len; i++) {
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bytes[i] = str.charCodeAt(i);
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window.utils = {
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/**
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* 隐藏文件选择器
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*
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* @param cb 回调函数
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*/
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selectFile: function (cb) {
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var input = document.createElement('input');
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input.style.display = 'none';
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input.type = "file";
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document.body.appendChild(input);
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input.dispatchEvent(new MouseEvent('click'));
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input.onchange = function (ev) {
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cb(ev.target.files);
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document.body.removeChild(input);
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}
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},
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/**
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* Blob二进制文件异步下载
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*
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* @param name 文件名
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* @param blob 二进制文件
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*/
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blobtoDown: function (name, blob) {
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var url = window.URL.createObjectURL(blob);
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console.log(url)
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var link = document.createElement('a');
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link.style.display = 'none';
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link.href = url;
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link.setAttribute('download', name);
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document.body.appendChild(link);
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link.dispatchEvent(new MouseEvent('click'));
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document.body.removeChild(link);
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},
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/**
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* base64转为String
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*
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* @param base64 base64字符串
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* @returns {string} 字符串
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*/
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base64toString: function (base64) {
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return window.atob(base64);
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},
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/**
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* base64转为字节数组
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*
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* @param base64 base64字符串
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* @returns {string} 字节数组
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*/
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base64toBytes: function (base64) {
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var str = window.atob(base64);
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var len = str.length;
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var bytes = new Int8Array(len);
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for (var i = 0; i < len; i++) {
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bytes[i] = str.charCodeAt(i);
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}
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return bytes;
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},
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/**
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*
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* @param base64
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* @returns {Int8Array}
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*/
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base64toBlob: function (base64) {
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return new Blob(this.base64toBytes(base64));
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}
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return bytes;
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};
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}
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wangbing
5 years ago