小程序使用页面间事件通信监听系统返回按钮

跳转事件

orderDetail(event: any) {
                  const data = event.currentTarget.dataset.data
                  wx.navigateTo({
                        url: "/pages/order/pages/orderDetail/index?id=" + data.orderId,
                        events: {
                              back: (data: any) => {
                                    if (data && data.back) {
                                          this.getData();
                                    }

                              }
                        }
                  })

            }

/pages/order/pages/orderDetail/index页面

      onUnload() {
            const event = this.getOpenerEventChannel()
            if (event) {
                  event.emit("back", { back: 'orderDetail' })
            }
      }