微信小程序editor上傳圖片轉化爲base64格式

方法：通過官網提供的api實現

關鍵代碼

const imgUrl = 'data:image/png;base64,' + wx.arrayBufferToBase64(wx.getFileSystemManager().readFileSync(tempFilePaths));

完整代碼加詳細解釋

//此事件爲點擊圖片按鈕上傳的事件
insertImage() {
    const that = this
//關於API  wx.chooseImage解釋見官網
//https://developers.weixin.qq.com/miniprogram/dev/api/media/image/wx.chooseImage.html
    wx.chooseImage({
      count: 1,//一次只能選擇一張圖片
      sizeType: ['original', 'compressed'],//原圖或者是壓縮圖
      sourceType: ['album', 'camera'],//相冊或者是相機現拍
      success: function (res) {
        const tempFilePaths = res.tempFilePaths[0];//圖片文件
        //劃重點了，此處爲關鍵代碼，結合百度經驗和官方文檔得來
//https://jingyan.baidu.com/article/cb5d61055c2b36405c2fe0aa.html
//https://developers.weixin.qq.com/miniprogram/dev/api/base/wx.arrayBufferToBase64.html
//https://developers.weixin.qq.com/miniprogram/dev/api/file/FileSystemManager.readFileSync.html
        const imgUrl = 'data:image/png;base64,' + wx.arrayBufferToBase64(wx.getFileSystemManager().readFileSync(tempFilePaths));
        //editorCtx爲編輯器
        //更多editor的解釋見官網
//https://developers.weixin.qq.com/miniprogram/dev/api/media/editor/EditorContext.html
//https://developers.weixin.qq.com/miniprogram/dev/api/media/editor/EditorContext.insertImage.html
        that.editorCtx.insertImage({
          src: imgUrl,
          success: function () {
            console.log('insert image success')
          }
        })
      }
    })
  }