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48 lines
1.4 KiB
JavaScript
48 lines
1.4 KiB
JavaScript
/**
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* base64 处理 工厂类
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*
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* add by wuxw 2020-01-01 美丽的夏都西宁
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*/
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class Base64Factory {
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constructor() {}
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static urlTobase64(url) {
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return new Promise((resolve, reject) => {
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// wx.request({
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// url: url,
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// responseType: 'arraybuffer', //最关键的参数，设置返回的数据格式为arraybuffer
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// success: res => {
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// //把arraybuffer转成base64
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// let base64 = wx.arrayBufferToBase64(res.data);
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// //不加上这串字符，在页面无法显示的哦
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// base64 = 'data:image/jpeg;base64,' + base64
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// //打印出base64字符串，可复制到网页校验一下是否是你选择的原图片呢
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// resolve(base64)
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// },
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// fail:function(e){
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// console.log(e);
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// reject(e);
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// }
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// })
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wx.getFileSystemManager().readFile({
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filePath: url,
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//选择图片返回的相对路径
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encoding: 'base64',
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//编码格式
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success: res => {
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//成功的回调
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//console.log('data:image/png;base64,' + res.data);
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let base64 = 'data:image/png;base64,' + res.data;
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resolve(base64);
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},
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fail: function (e) {
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console.log(e);
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reject(e);
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}
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});
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});
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}
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}
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module.exports = Base64Factory; |