1 uni.request({
2   url:'', // 地址
3   data:{}, // 请求body
4   header:{}, //请求header
5   method: '', // 请求方式 'GET'/'POST'/'PUT'/'DELETE'
6   success: (res)=>{}, // 请求成功回调
7   fail: (res)=>{}, // 请求失败回调
8   complete: (res)=>{}, // 请求完成回调
9 })

  request(options = {}) {
    return new Promise((resolve, reject) => {
      // 拦截处理1：header共通处理
      const _config = this.requestBeforeFun(options)
      if (!next) return
      const requestTask = uni.request({
        url: _config.url,
        data: _config.data,
        header: _config.header,
        method: _config.method,
        complete: (response) => {
          if (this.validateStatus(response.statusCode)) { // 成功
            // 拦截处理2：请求成功，数据的共通处理
            response = this.requestComFun(response)
            resolve(response)
          } else {
            // 拦截处理3：请求失败，错误码的共通处理
            response = this.requestComFail(response)
            reject(response)
          }
        }
      })
    })
  }

interceptor = {
    request: (cb) => {
      if (cb) {
        this.requestBeforeFun = cb
      }
    },
    response: (cb, ecb) => {
      if (cb) {
        this.requestComFun = cb
      }
      if (ecb) {
        this.requestComFail = ecb
      }
    }
  }