Solution to disconnection and reloading during WeChat development

Analysis

微信小程序目前没有提供刷新API，所以要自己去记录当前操作，点击刷新重新执行一遍

Effect

##Click 'Reload' to reload the page

Implementation

Since when working on a project, page rendering is inseparable from

Interface requests, so I encapsulated wx.request to determine whether the network is disconnected, and record this time after the network is disconnected Request

    /**
     * obj  request请求参数
     * cb   requrst请求成功回掉
     * page 当前page实例
    **/

    function wxRequest (obj, cb, page, type) {
        var isOne = true
        var cachFn = function () {
            wx.request({
                  url: obj.url,
                  data: obj.data || {},
                  method: obj.method || 'GET',
                  success: function (res) {
                    cb.call(page, res)
                    if (!page.data.isNet) {
                        page.setData({
                            isNet: true
                        })
                    }
                  },
                  // fail执行时当断网处理
                  fail: function () {
                      // 防止fail 有时会执行两次，影响渲染
                      if (!isOne) {
                          return
                      }
                    page.setData({
                        isNet: false,
                        isRequested: false
                    })
                    // 记录本次请求，加载时，执行page实例的reloadFn即可
                      page.reloadFn = wxRequest(obj, cb, page, 1)
                      isOne = false
                  }
            })
        }
    
        if (type) {
            page.isRequested = true
        }
    
        return type ? cachFn : cachFn()
    }

Application

 let data = {
      url: '',
      data: {},
      method: ''
    }
    wxTools.wxRequest(data, (res) => {
        // 数据渲染
        this.setData({})
    }, this)

When the network is disconnected, executing this.reloadFn will return to the last request, isNet and determine whether the network is disconnected

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