微信小程序上滑加载下拉刷新（onscrollLower）分批加载数据（一）

var n=0
 page.init = function(callback) {
 page.data.loading = true;
 n+=10;
 cardService.listFavoriteCards(n,function(result){
 var cards = result.data.favoriteCards; 
 var starCards = result.data.starCards;

 starCards.sort(function(c1,c2){
 var c1Name = pinyingUtil.getInitials.convertPinyin(c1.name);
 var c2Name = pinyingUtil.getInitials.convertPinyin(c2.name);

 return c1Name > c2Name ? 1 : -1;
 });

 if(starCards && starCards.length> 0) {
 starCards.forEach(function(c){
 var compressEntName = dictService.compressEntName(c.companyName);
 c.compressEntName = compressEntName;
 });
 }

 page.setData({
 "favoriteCards" : cards,
 "starCards" : starCards,
 "filterType" : "name",
 "groups" : cardService.groupCardsByNameFirstLetter(cards),
 "loadding":false
 });
 wx.setStorageSync("setgroups",page.data.groups)
 });
 };

}

onLoad: function (options) {

 var geigroups=wx.getStorageSync('setgroups')
 var result =[]
 for(var i=0; i<geigroups.length; i+=5){
 result.push(geigroups.slice(i,i+5));
 }
 var resultd=result[0]
 if(geigroups){ 
 page.setData({
 "groups" : resultd
 }); 
 console.log('缓存')
 }else{
 if (wx.getStorageSync("token")) {
 page.init();
 page.initProfile();
 } else {
 App.addListener("evt_login", function () {
 page.init();
 page.initProfile();
 });
 }
 console.log('正常')
 }
}

onscrollLower:function(){
 var page = this;
 var geigroups=wx.getStorageSync('setgroups') //第一步拿数据
 var result =[] //定义空数组
 var n=0; //定义index
 for(var i=0; i<geigroups.length; i+=10){
 result.push(geigroups.slice(i,i+10));
 } //把数据每10个一组push到 result里面
 n+=1;

 var q=this.data.groups.length;
 if(geigroups){ //如果有缓存
 if(geigroups.length<=q) //如果当前data的数据少于缓存执行以下命令
 if (wx.getStorageSync("token")) { //如果有token请求数据
 page.init();
 page.initProfile();
 } else {
 App.addListener("evt_login", function () { //监听用户登陆以后 请求数据
 page.init();
 page.initProfile();
 });
 }

 }else{
 page.setData({
 "groups" : result[n], 
 }); 
 }
 },