var requests = require('../../requests/request.js');
var utils = require('../../utils/util.js');
//刷新动态球颜色
var iconColor = [
'#42BD56', '#31A040'
];
Page({
data: {
scrollHeight: 0, //scroll-view高度
pageIndex: 0, //页码
totalRecord: 0, //图书总数
isInit: true, //是否第一次进入应用
loadingMore: false, //是否正在加载更多
footerIconColor: iconColor[0], //下拉刷新球初始颜色
pageData: [], //图书数据
searchKey: null //搜索关键字
},
//页面显示获取设备屏幕高度,以适配scroll-view组件高度
onShow: function () {
wx.getSystemInfo({
success: (res) => {
console.log(res)
this.setData({
scrollHeight: res.windowHeight - (100 * res.windowWidth / 750) //80为顶部搜索框区域高度 rpx转px 屏幕宽度/750
});
}
})
},
//搜索输入框输入取值
searchInputEvent: function (e) {
this.setData({ searchKey: e.detail.value });
},
//搜索按钮点击事件
searchClickEvent: function (e) {
if (!this.data.searchKey) {
return;
}
this.setData({ pageIndex: 0, pageData: [] });
requestData.call(this);
},
//下拉请求数据
scrollLowerEvent: function (e) {
if (this.data.loadingMore)
return;
requestData.call(this);
},
//跳转到详细页面
toDetailPage: function (e) {
var bid = e.currentTarget.dataset.bid; //图书id [data-bid]
wx.navigateTo({
url: '../detail/detail?id=' + bid
});
}
});
/**
* 请求图书信息
*/
function requestData() {
var _this = this;
var q = this.data.searchKey;
var start = this.data.pageIndex;
this.setData({ loadingMore: true, isInit: false });
updateRefreshBall.call(this);
console.log(start)
requests.requestSearchBook({ q: q, start: start }, (data) => {
if (data.total == 0) {
//没有记录
_this.setData({ totalRecord: 0 });
} else {
_this.setData({
pageData: _this.data.pageData.concat(data.books),
pageIndex: start + 1,
totalRecord: data.total
});
}
}, () => {
_this.setData({ totalRecord: 0 });
}, () => {
_this.setData({ loadingMore: false });
});
}
/**
* 刷新下拉效果变色球
*/
function updateRefreshBall() {
var cIndex = 0;
var _this = this;
var timer = setInterval(function () {
if (!_this.data['loadingMore']) {
clearInterval(timer);
}
if (cIndex >= iconColor.length)
cIndex = 0;
_this.setData({ footerIconColor: iconColor[cIndex++] });
}, 100);
}
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