let pages = getCurrentPages();
    let currPage = pages[pages.length - 1]; //当前页面
    let prevPage = pages[pages.length - 2]; //上一个页面
    let prevPage_ = pages[pages.length - 3];
    prevPage.setData({
      curr_arry_2: that.data.res_arry,
      photo_set_quantity: true
    });
    console.log(that.data.res_arry)
    wx.navigateBack({
      delta: 1
    })