Page({
	/**
	 * 页面的初始数据
	 */
	data: {
		ListData: []
	},
	/**
	 * 生命周期函数--监听页面加载
	 */
	onLoad: function(options) {
		var that = this;
		var timestamp = Date.parse(new Date()); //时间戳
		var expiration = timestamp + 1800000; //缓存半个小时
		var key_data = wx.getStorageSync("keydata"); //获取异步缓存数据
		var data_expiration = wx.getStorageSync("data_expiration");
		if (data_expiration && key_data) {			
			if (timestamp > data_expiration) {
				wx.hideLoading();
				//删除缓存再次请求
				wx.clearStorageSync();
				wx.clearStorage();
				wx.setStorageSync("data_expiration", expiration);
				that.Getapi();
			}else{
				//获取缓存数据
				that.setData({
					ListData: key_data
				})
			}
		} else {
			wx.hideLoading();
			//请求
			wx.setStorageSync("data_expiration", expiration);
			that.Getapi();
		}
	},
	/**
	 * 请求
	 */
	Getapi: function() {
		var that = this;
		wx.showLoading({
			title: '玩命加载中',
			mask: true
		});
		wx.request({
			url: "接口",
			data: {},
			method: 'GET',
			dataType: 'json',
			success(result) {
				wx.hideLoading();
				//将请求成功的数据异步存储到本地
				wx.setStorage({
					key: 'keydata',
					data: result.data
				})
				that.setData({
					ListData: result.data
				})
			}
		})
	}
})