我在小程序a页面中进行分享的同时进行跳转，分享结束后仍在a页面，但是b页面的日志有被打印，并执行了b页面的销毁方法，请问如何能分享的时候b页面不被销毁

onShareAppMessage: function () {
        const { cardDescription} = this.data;
        const { userInfo } = app.globalData;
        let shareData = {
          nickName: userInfo.nickName,
          avatarUrl: userInfo.avatarUrl,
          cardNo: cardDescription.cardNo,
          cardUniqueId: cardDescription.sendUniqueId,
        }
        let shareObj = {};
        shareObj = {
          title: '送你一份温暖心意～',
          path: '/package/receiveCard/receiveCard?data=' + encodeURIComponent(JSON.stringify(shareData)),
          imageUrl: cardDescription.cardFace,
        }
        wx.redirectTo({
            url: '/package/cardIsSend/cardIsSend?cardNo=' + cardDescription.cardNo,
        })
        return shareObj;
    }