微信小程序返回上一级页面的实现代码

<view class="refusea_btn">
    <van-button type="primary" size="large" bind:tap="submit">保存</van-button>
</view>

//提交
 submit(){
  let data = this.data;
  let params = data.AddressVo;
  if(params.name == ""){
   wx.showToast({
    icon: "none",
    title:"请输入发货人姓名"
   })
   return
  }
  if(params.mobile == ""){
   wx.showToast({
    icon: "none",
    title:"请填写手机号"
   })
   return
  }
  if(params.address == ""){
   wx.showToast({
    icon: "none",
    title:"请选择收货地址"
   })
   return
  }
  if(params.addressDetail == ""){
   wx.showToast({
    icon: "none",
    title:"请填写详细收货地址"
   })
   return
  }
  POST('/store/saveShipAddress', params).then(res => {
   if(res.code === 200){
    wx.showToast({
     icon:'success',
     title:'保存成功！'
    })
    setTimeout(item => {
     wx.navigateBack({
      delta: 1 //返回上一级页面
     })
    },2000)
   }else{
    wx.showToast({
     icon:'none',
     title:'保存失败'
    })
   }
  })
 },

/返回上一级关闭当前页面
wx.navigateBack({
 delta: 1
})