Code for weather forecast development in WeChat applet

data:{
  weatherApikey:'', //天气apikey，在http://apistore.baidu.com 上申请
  city:'', //城市名称
  areaid:'', //城市对应的id
  curWd:{}, //当天天气情况
  indexs:{}, //当天天气详情说明
  forecast:{} //未来4天的天气情况
},
onLoad:function(options){
  // 生命周期函数--监听页面加载
  this.setData({weatherApikey:getApp().globalData.weatherApikey});
  this.loadLocation();
},

//获取当前的位置信息，即经纬度
loadLocation: function() {
 var page = this;
 wx.getLocation({
  type: 'gcj02', // 默认为 wgs84 返回 gps 坐标，gcj02 返回可用于 wx.openLocation 的坐标
  success: function(res){
   // success
   var latitude = res.latitude;
   var longitude = res.longitude;

   //获取城市
   page.loadCity(latitude, longitude);
  }
 })
},

//通过经纬度获取城市
loadCity: function(latitude, longitude) {
 var page = this;
 //这个key是自己在http://apistore.baidu.com上申请的
 var key = "XSWBZ-EVQ3V-UMLPA-U4TP6-6MQFZ-UUFSL";
 var url = "http://apis.map.qq.com/ws/geocoder/v1/?location="+latitude+","+longitude+"&key="+key+"&get_poi=1";
 wx.request({
  url: url,
  data: {},
  method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
  // header: {}, // 设置请求的 header
  success: function(res){
   // success
    var city = res.data.result.address_component.city;
    city = city.replace("市", ""); //将“市”去掉，要不然取不了天气信息
    page.setData({city: city});
    page.loadId(city);
  }
 })
},

//通过城市名称获取城市的唯一ID
loadId: function(city) {
 var page = this;
 var url = "http://apis.baidu.com/apistore/weatherservice/citylist";
 wx.request({
  url: url,
  data: {
    cityname: city
  },
  header: {
    apikey:page.data.weatherApikey
  }, 
  method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
  success: function(res){
   // success
   var cityid = res.data.retData[0].area_id;

   page.setData({areaid: cityid});
   page.loadWeather(city, cityid);
  }
 })
},

//通过城市名称和城市ID获取天气情况
loadWeather: function(city, areaId) {
 var page = this;
 var url = "http://apis.baidu.com/apistore/weatherservice/recentweathers";
 wx.request({
  url: url,
  data: {
    cityname:city,
    cityid: areaId
  },
  header: {
    apikey: page.data.weatherApikey
  },
  method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
  success: function(res){
   // success
   page.setData({curWd : res.data.retData.today, indexs: res.data.retData.today.index, forecast:res.data.retData.forecast});
  }
 })
},

//事件绑定，跳转到天气详情页面
gotoDetail: function(event) {
// console.log(this.data.areaid+"==在这里跳转=="+this.data.city);
wx.navigateTo({
 url: '../detail/detail?city='+this.data.city+"&cityid="+this.data.areaid
})
}

<view class="main-container">
  <import src="../templates/today-tpl"/>
  <view bindtap="gotoDetail">
  <template is="today-tpl" data="{{city, curWd}}"/>
  </view>

  <import src="../templates/index-tpl"/>

  <view class="index-content">
    <block wx:for="{{indexs}}" wx:key="item" wx:for-index="idx">
      <template is="index-tpl" data="{{item,idx}}"></template>
    </block>
  </view>

  <import src="../templates/forecast-tpl"/>
  <view class="forecast">
    <block wx:for="{{forecast}}" wx:key="item">
      <template is="forecast-tpl" data="{{item}}"/>
    </block>
  </view>

</view>

<template name="today-tpl">
  <view class="today">
    <view class="city">{{city}}</view>
    <view class="date">{{curWd.date}} {{curWd.week}}</view>

    <view class="temp">{{curWd.curTemp}}</view>
    <view class="weather">{{curWd.type}} {{curWd.lowtemp}}/{{curWd.hightemp}}</view>
    <view class="wd">{{curWd.wd}}</view>
  </view>
</template>