wxml:

<button  type='warn' open-type="getUserInfo" class='btn' bindgetuserinfo="getUserInfo">确认授权</button>

js:

getUserInfo: function (e) {

    const appId = '******';

    const sessionKey = wx.getStorageSync('sessionKey');

    const encryptedData = e.detail.encryptedData;

    const iv = e.detail.iv;

    const pc = new WXBizDataCrypt(appId, sessionKey);

    const data = pc.decryptData(encryptedData, iv);

    wx.setStorageSync('openId', data.unionId);

},

调试报错信息如下：