微信小程序，两种方式实现上拉加载，下拉刷新

微信小程序，两种方式实现上拉加载，下拉刷新，用于列表展示数据

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2017-12-15 15:25  wxRefreshLoadDemo\
     文件        6148  2017-12-18 14:50  wxRefreshLoadDemo\.DS_Store
     目录           0  2017-12-19 13:56  __MACOSX\
     目录           0  2017-12-19 13:56  __MACOSX\wxRefreshLoadDemo\
     文件         120  2017-12-18 14:50  __MACOSX\wxRefreshLoadDemo\._.DS_Store
     文件         711  2017-12-18 15:24  wxRefreshLoadDemo\app.json
     文件         446  2017-12-15 15:25  wxRefreshLoadDemo\project.config.json
     目录           0  2017-12-15 15:25  wxRefreshLoadDemo\utils\
     文件         472  2017-12-15 15:25  wxRefreshLoadDemo\utils\util.js
     文件         194  2017-12-15 15:25  wxRefreshLoadDemo\app.wxss
     目录           0  2017-12-18 15:00  wxRefreshLoadDemo\pages\
     文件        6148  2017-12-18 14:54  wxRefreshLoadDemo\pages\.DS_Store
     目录           0  2017-12-19 13:56  __MACOSX\wxRefreshLoadDemo\pages\
     文件         120  2017-12-18 14:54  __MACOSX\wxRefreshLoadDemo\pages\._.DS_Store
     目录           0  2017-12-18 14:54  wxRefreshLoadDemo\pages\images\
     文件        6148  2017-12-18 14:53  wxRefreshLoadDemo\pages\images\.DS_Store
     目录           0  2017-12-19 13:56  __MACOSX\wxRefreshLoadDemo\pages\images\
     文件         120  2017-12-18 14:53  __MACOSX\wxRefreshLoadDemo\pages\images\._.DS_Store
     文件        3078  2017-12-18 14:53  wxRefreshLoadDemo\pages\images\iv4.png
     文件         750  2017-12-18 14:53  __MACOSX\wxRefreshLoadDemo\pages\images\._iv4.png
     文件        3017  2017-12-18 14:48  wxRefreshLoadDemo\pages\images\iv2.png
     文件         750  2017-12-18 14:48  __MACOSX\wxRefreshLoadDemo\pages\images\._iv2.png
     文件        2802  2017-12-18 14:53  wxRefreshLoadDemo\pages\images\iv3.png
     文件         750  2017-12-18 14:53  __MACOSX\wxRefreshLoadDemo\pages\images\._iv3.png
     文件        2700  2017-12-18 14:48  wxRefreshLoadDemo\pages\images\iv1.png
     文件         750  2017-12-18 14:48  __MACOSX\wxRefreshLoadDemo\pages\images\._iv1.png
     目录           0  2017-12-18 14:59  wxRefreshLoadDemo\pages\second\
     文件        2584  2017-12-18 17:03  wxRefreshLoadDemo\pages\second\second.js
     文件          35  2017-12-18 15:24  wxRefreshLoadDemo\pages\second\second.json
     文件         434  2017-12-18 16:29  wxRefreshLoadDemo\pages\second\second.wxml
     文件         230  2017-12-18 16:32  wxRefreshLoadDemo\pages\second\second.wxss
............此处省略10个文件信息