微信小程序—天气预报

微信小程序—天气预报
作者：邱名涛
撰写时间：2020 年05 月06日
技术要点：百度天气api,查询天气，未来三天 天气预测。

wxss.

/**index.wxss**/
page{
  height:100%;
}

.content {
  height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  font-family: 微软雅黑,宋体;
  box-sizing: border-box;
  color: #FFFFFF;
  font-size: 17px;
  background-size:100% 100%;
  /* background-color: #F2F2F8 */
}


/*当日天气*/
.info {
  width: 100%;
  height: 160px;
}

/*城市和日期显示*/
.city {
  width: 100%;
  text-align: center;
  padding-top: 30rpx;
  padding-bottom: 30rpx;
}

/*周几*/
.city .weekday {
  float: left;
  font-size: 30rpx;
  font-weight: bold;
  text-align: left;
  padding-top: 20rpx;
  padding-left: 30rpx;
  width: 30%;
}

/*城市名称*/
.city .cityName {
  display:inline;
  font-size: 50rpx;
}

/*日期*/
.city .currentDate {
  float: right;
  font-size: 30rpx;
  font-weight: bold;
  text-align: right;
  padding-top: 20rpx;
  padding-right: 30rpx;
  width: 30%;
}

/*实时温度块*/
.temp {
  margin: 20rpx 20rpx 0 0;
  text-align: center;
  padding-bottom: 30rpx;
}

/*实时温度*/
.currentTemp {
  font-size: 120rpx;
  line-height: 130rpx;
  position: relative;
  display:inline-block;
  color: #FFFFFF;
}

/*实时温度右侧部分*/
.temp_right {
  position: relative;
  display: inline-block;
  padding-left: 10rpx;
  vertical-align: top;
  text-align: left;
}

/*摄氏度符号*/
.celsius {
  font-size: 40rpx;
  padding-top: 10rpx;
  color: #FFFFFF;
}

/*实时文字*/
.realtime {
  font-size: 30rpx;
  padding-top: 5rpx;
}

/**天气图标**/
.weatherIcon {
  margin: 0 auto;  
  display: flex;
  justify-content: center;
  overflow: hidden;
  width: 161rpx;
  height: 161rpx;
  border-radius: 50%;
}

/*类型*/
.type {
  font-weight: bold;
  text-align: center;
}

/*温度范围*/
.tempRange {
  font-weight: bold;
  margin-top: 20rpx;
  text-align: center;
  padding-top:5rpx;
}

/*风向风速*/
.wind {
  font-weight: bold;
  margin: 20rpx 0;
  text-align: center;
  padding-top:5rpx;
}

/*空气质量*/
.air {
  width: 35%;
  font-weight: bold;
  text-align: center;
  padding: 5rpx;
  margin: 0 auto;  
  display: flex;
  justify-content: center;
  border: 1px solid #00EE00;
  background-color: #00EE00;
  border-radius: 10rpx
}

/*最近3天天气*/
.forecast {
  width: 100%;
  display: flex;
  margin-top: 480rpx;
  align-self: flex-end;
  padding-bottom: 30rpx;
  font-weight: bold;
}

/*最近3天天气图标*/
.forecastIcon {
  margin: 0 auto;  
  display: flex;
  justify-content: center;
  overflow: hidden;
  width: 100rpx;
  height: 100rpx;
}

/*每一天的天气*/
.next-day {
  width: 30%;
  height: 430rpx;
  text-align: center;
  line-height: 30px;
  font-size: 16px;
  margin: 0 10rpx;
  border: 2px solid #043567;
  border-radius: 10rpx;
  box-shadow: 10px 10px 5px #888888;
}

/*日期*/
.date {
  margin-bottom: 20rpx;
  border-bottom: 1px solid #043567;
  color: #FFFFFF;
}

/*指数块*/
.tips {
  width: 90%;
  padding: 10rpx;
  margin: 30rpx auto;
  border-radius: 10rpx;
  border: 2px solid #043567;
  box-shadow: 10px 10px 5px #888888;
}

/*指数文字*/
.index {
  color: #FFFFFF;
  font-weight: bold;
  margin: 5px 0;
}

/*描述*/
.description {
  line-height: 22px;
  margin: 5px 0;
}

/*搜索区域*/
.search-area {
  display: flex;
  padding: 1rem 0.5rem;
}

/*输入框*/
.search-area input {
  width: 60%;
  height: 38px;
  line-height: 38px;
  
  border: 1px solid #CCC;
  box-shadow: 3px 3px 6px 0px #CCC;
  color: #000;
  background-color: #FFF;
  border-radius: 5px;
  margin: 0 auto;  
  display: flex;
  padding-left: 30rpx;
}

/*按钮*/
.search-area button {
  width: 20%;
  height: 40px;
  line-height: 40px;
  margin-left: 2rpx;
}

wxml.

<!--index.wxml-->
<view class="content">
  <scroll-view scroll-y='true' style='height:{{scroll_height}}rpx' enable-back-to-top='true' scroll-top='{{topNum}}'>
  <image class='background' src="https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1588698509085&di=ab467dbadbe355e4d8be2d4ea0ac012f&imgtype=0&src=http%3A%2F%2Fpic1.win4000.com%2Fwallpaper%2F2018-09-03%2F5b8cc37540612.jpg" mode="aspectFill"></image>
  <!--当日天气-->
  <view class="info">
    <view class='city'>
      <view class='weekday'>{{weekday}}</view>
      <view class='cityName'>{{currentWeather.currentCity}}</view>
      <view class='currentDate'>{{currentDate}}</view>
    </view>
 
    <view class='temp'>
      <view class='currentTemp'>{{currentWeather.date}}</view>
      <view class = 'temp_right'>
        <view class='celsius'>℃</view>
        <view class='realtime'>(实时)</view>
      </view>
    </view>

    <image class='weatherIcon' src='{{iconURL}}' mode="Widthfix"></image>
    <view class='type'>{{currentWeather.weatherDesc}}</view>
    <view class='tempRange'>{{currentWeather.temperature}}</view>
    <view class='wind'>{{currentWeather.wind}}</view>
    <view class='air' style="background:{{airColor}}; border:{{airColor}}">{{currentWeather.pm25}}  {{airClass}}</view>
  </view>

  <!--最近3天天气-->
  <view class='forecast'>
    <view class='next-day' wx:for="{{forecast}}" wx:key="{{index}}" > 
      <view class='detail date'>{{item.date}}</view>
      <image class='forecastIcon' src='{{item.iconURL}}' mode="Widthfix"></image>
      <view class='detail'>{{item.weather}}</view>
      <view class='detail'>{{item.temperature}}</view>
      <view class='detail'>{{item.windDeriction}}</view>
      <view class='detail'>{{item.windSpeed}}</view>
    </view>
  </view>

  <!--感冒指数-->
  <view class='tips'>   
    <view class='index'>感冒指数：{{ganmao.zs}}</view>
    <view>
      <view class='description'>{{ganmao.des}}</view>
    </view>
  </view>

  <!--运动指数-->
  <view class='tips'>   
    <view class='index'>运动指数：{{yundong.zs}}</view>
    <view>
      <view class='description'>{{yundong.des}}</view>
    </view>
  </view>

  <!--紫外线指数-->
  <view class='tips'>   
    <view class='index'>紫外线指数：{{ziwaixian.zs}}</view>
    <view>
      <view class='description'>{{ziwaixian.des}}</view>
    </view>
  </view>

  <!--洗车指数-->
  <view class='tips'>   
    <view class='index'>洗车指数：{{xiche.zs}}</view>
    <view>
      <view class='description'>{{xiche.des}}</view>
    </view>
  </view>

   <!-- 搜索 -->
  <view class='search-area'>
    <input bindinput='inputing' placeholder='查询其它城市天气' value='{{inputCity}}'></input>
    <button type='primary' size='mini' bindtap='bindSearch'>查询</button>
  </view>
  </scroll-view>
</view>

JS.

//index.js
//获取应用实例
const app = getApp()
//调用百度地图天气API的js文件
var bmap = require('../../libs/bmap-wx.js');

Page({
  //“分享”功能
  onShareAppMessage: function () {
    let that = this;
    return {
      title: '分享',
      path: '/pages/index',
      success: (res) => {
        console.log(res.shareTickets[0])
        wx.getShareInfo({
          shareTicket: res.shareTickets[0],
          success: (res) => {
            that.setData({
              isShow: true
            })
            console.log(that.setData.isShow)
          },
          fail: function (res) { console.log(res) },
          complete: function (res) { console.log(res) }
        })
      },
      fail: function (res) {
        console.log(res)
      }
    }
  },

  data: {
    currentWeather: {},
    inputCity: "",
    topNum: 0,
    scroll_height: 0
  },

  onLoad: function () {
    let windowHeight = wx.getSystemInfoSync().windowHeight // 屏幕的高度
    let windowWidth = wx.getSystemInfoSync().windowWidth // 屏幕的宽度
    this.setData({
      scroll_height: windowHeight * 750 / windowWidth
    });
    this.getWeather("");
  },

  //查询天气
  getWeather: function (cityName) {
    //提示“加载中”
    wx.showToast({
      title: '加载中',
      icon: 'loading',
      mask: true
    });

    var that = this;

    // 新建百度地图对象 
    var BMap = new bmap.BMapWX({ 
      ak: 'WGcD2wviqL3MiIqyNgI4xbTd4hKjRYZE'
    });

    //查询失败
    var fail = function (data) {
      //关闭加载提示框
      wx.hideLoading();

      var statusCode = data["statusCode"];
      //城市名称查询不到，弹窗提示
      if (statusCode == "No result available") {
        wx.showModal({
          title: '提示',
          content: '输入的城市名称有误，请重新输入',
          confirmText: '好的',
          confirmColor: '#ACB4E3',
          showCancel: false,
        });
      }
    };

    //查询成功
    var success = function (data) {
      //关闭加载提示框
      wx.hideLoading();

      //获取当前的日期和星期几
      var currentDate = that.getDate().substring(5);
      var weekday = data.currentWeather[0].date.substring(0, 2);
      //currentDate = currentDate + "  " + weekday;

      //返回的数据包括2部分：data.currentWeather和data.originalData.results
      //console.log(data);
      //console.log(data.currentWeather);
      //console.log(data.originalData);
      //console.log(data.originalData.results);

      //第1部分数据示例
      var currentWeather = data.currentWeather[0];
      //currentWeather.currentCity："济南市"
      //currentWeather.date："周四 01月17日 (实时：3℃)"
      //currentWeather.pm25："85"
      //currentWeather.temperature："7 ~ -2℃"
      //currentWeather.weatherDesc："晴"
      //currentWeather.wind："南风微风"

      //获得天气图标URL
      var iconURL = that.getIconURL(currentWeather.weatherDesc);

      //截取出实时温度数据
      var begin = currentWeather.date.indexOf("时");
      var end = currentWeather.date.indexOf(")");
      currentWeather.date = currentWeather.date.substring(begin + 2, end - 1);
      //console.log(currentWeather.date);

      //调整温度范围显示
      currentWeather.temperature = that.tempSwitch(currentWeather.temperature);

      //判断空气质量等级
      var pm25 = currentWeather.pm25;
      var airClass = "";
      var airColor = "";
      if (pm25 <= 50) {
        airClass = "优";
        airColor = "#00EE00";
      }
      else if (pm25 > 50 && pm25 <= 100) {
        airClass = "良";
        airColor = "#EEEE00";
      }
      else if (pm25 > 100 && pm25 <= 150) {
        airClass = "轻度污染";
        airColor = "#FF8C00";
      }
      else if (pm25 > 150 && pm25 <= 200) {
        airClass = "中度污染";
        airColor = "#FF3030";
      }
      else if (pm25 > 200 && pm25 <= 300) {
        airClass = "重度污染";
        airColor = "#E066FF";
      }
      else {
        airClass = "严重污染";
        airColor = "#8B0000";
      }

      //第2部分数据示例
      var tipsArray = new Array(5);
      tipsArray = data.originalData.results[0].index;
      var chuanyi = tipsArray[0];
      var xiche = tipsArray[1];
      var ganmao = tipsArray[2];
      var yundong = tipsArray[3];
      var ziwaixian = tipsArray[4];

      //chuanyi.tipt：穿衣指数
      //chuanyi.zs：较冷
      //chuanyi.des："建议着厚外套加毛衣等服装。年老体弱者宜着大衣、呢外套加羊毛衫。"

      //xiche.tipt：洗车指数
      //xiche.zs：较适宜
      //xiche.des："较适宜洗车，未来一天无雨，风力较小，擦洗一新的汽车至少能保持一天。"

      //ganmao.tipt：感冒指数
      //ganmao.zs：少发
      //ganmao.des："各项气象条件适宜，无明显降温过程，发生感冒机率较低。"

      //yundong.tipt：运动指数
      //yundong.zs：较适宜
      //yundong.des："天气较好，无雨水困扰，较适宜进行各种运动，但因气温较低，在户外运动请注意增减衣物。"

      //ziwaixian.tipt：紫外线强度指数
      //ziwaixian.zs：中等
      //ziwaixian.des："属中等强度紫外线辐射天气，外出时建议涂擦SPF高于15、PA+的防晒护肤品，戴帽子、太阳镜。"

      //未来3天的天气预报
      var forecastArray = new Array(4);
      forecastArray = data.originalData.results[0].weather_data;

      var forecast = new Array(3);
      for (var i = 0; i < 3; i++) {
        forecast[i] = forecastArray[i + 1];
        //调整日期显示
        forecast[i].date = that.getForecatDate(i, forecast[i].date);
        //获得天气图标URL
        forecast[i].iconURL = that.getIconURL(forecast[i].weather);
        //调整温度范围显示
        forecast[i].temperature = that.tempSwitch(forecast[i].temperature);
        //调整风向和风速显示，如果没有风速，则风速为空
        forecast[i].windDeriction = that.getWindDeriction(forecast[i].wind);
        forecast[i].windSpeed = that.getWindSpeed(forecast[i].wind);
      }

      //配置数据
      that.setData({
        iconURL: iconURL,
        currentWeather: currentWeather,
        currentDate: currentDate,
        weekday: weekday,
        airClass: airClass,
        airColor: airColor,
        forecast: forecast,
        ganmao: ganmao,
        yundong: yundong,
        ziwaixian: ziwaixian,
        xiche: xiche
      });
    }

    // 发起weather请求
    //cityName为空，查询定位城市天气
    if (!cityName) {
      BMap.weather({
        cityName: "",
        fail: fail,
        success: success
      });
    }
    //cityName不为空，查询输入城市天气
    else {
      BMap.weather({
        cityName: cityName,
        fail: fail,
        success: success
      });
    }
  },

  //日期显示
  getDate: function () {
    var date = new Date();
    var year = date.getFullYear();
    var month = date.getMonth() + 1;
    var strDate = date.getDate();
    if (month >= 1 && month <= 9) {
      month = "0" + month;
    }
    if (strDate >= 0 && strDate <= 9) {
      strDate = "0" + strDate;
    }
    var currentdate = year + "年" + month + "月" + strDate + "日";
    return currentdate;
  },

  //未来3天预报中调整日期显示
  getForecatDate: function (index, weekday) {
    var date = this.getNextDate(index + 1);
    var result;
    result = date + " " + weekday;
    return result;
  },

  getNextDate: function (index) {
    var today = new Date();
    //后index天的日期
    var nextDate = new Date(today.getTime() + 24 * 60 * 60 * 1000 * index);
    var month = nextDate.getMonth() + 1;
    var strDate = nextDate.getDate();
    if (month >= 1 && month <= 9) {
      month = "0" + month;
    }
    if (strDate >= 0 && strDate <= 9) {
      strDate = "0" + strDate;
    }
    var result = month + "月" + strDate + "日";
    return result;
  },

  //转换温度范围显示格式，eg:"7 ~ -2℃"
  tempSwitch: function (temp) {
    var low;
    var high;
    var result;
    var flag = temp.indexOf("~");
    var length = temp.length;

    low = temp.substring(flag + 2, length - 1);
    high = temp.substring(0, flag - 1);
    result = low + " ~ " + high + "℃";

    return result;
  },

  //天气图标路径
  getIconURL: function (weatherDesc) {
    var condition = String(weatherDesc);
    var url = "";
    if (condition.includes("转")) {
      condition = condition.substring(0, condition.indexOf("转"));
    }

    if (condition.includes("晴")) {
      url = "https://ae01.alicdn.com/kf/Ue795d165d18d411f806163653eba07e2E.png";
    }
    else if (condition.includes("多云")) {
      url = "https://ae01.alicdn.com/kf/U8a2ae9f027804ababbd968d903f4b848I.png";
    }
    else if (condition.includes("阴")) {
      url = "https://ae01.alicdn.com/kf/U22db7f19a8ab432aa306922cbdca8c3ad.png";
    }
    else if (condition.includes("阵雨")) {
      url = "https://ae01.alicdn.com/kf/Ufc5cd30268754c1ab992632c4d4154a6N.png";
    }
    else if (condition.includes("雷阵雨")) {
      url = "https://ae01.alicdn.com/kf/U609378294db842a8bab0718dbfb9fc55n.png";
    }
    else if (condition.includes("雨夹雪")) {
      url = "https://ae01.alicdn.com/kf/Ub6893c94b53e49a1bc244c288f961c31T.png";
    }
    else if (condition.includes("小雨")) {
      url = "https://ae01.alicdn.com/kf/U02f202d1e9b4440589ae6b8ac0d93c58m.png";
    }
    else if (condition.includes("中雨")) {
      url = "https://ae01.alicdn.com/kf/Ubdca1610fa18458b971d9f25d42f4c79y.png";
    }
    else if (condition.includes("大雨")) {
      url = "https://ae01.alicdn.com/kf/U59e4bcdbb7144a56a3a60c0de7aeefb5D.png";
    }
    else if (condition.includes("暴雨")) {
      url = "https://ae01.alicdn.com/kf/U414646a0ee534868bb8e625d74acfbabg.png";
    }
    else if (condition.includes("阵雪")) {
      url = "https://ae01.alicdn.com/kf/U839ec136d5fa4b6ba6411d0806a06b3ce.png";
    }
    else if (condition.includes("小雪")) {
      url = "https://ae01.alicdn.com/kf/U3a4be42c858c4cc8aecde2b29425edf6A.png";
    }
    else if (condition.includes("中雪")) {
      url = "https://ae01.alicdn.com/kf/U46ab44e2a403469cb500f2514a9258c71.png";
    }
    else if (condition.includes("大雪")) {
      url = "https://ae01.alicdn.com/kf/U16a2a60ff3e04bc0b382c3f62491320bg.png";
    }
    else if (condition.includes("暴雪")) {
      url = "https://ae01.alicdn.com/kf/Ua7bca2b9687847f5952e0cd85f49a33fK.png";
    }
    else if (condition.includes("雾")) {
      url = "https://ae01.alicdn.com/kf/U0a6e366ca3bb442384d18327608a595dU.png";
    }
    else if (condition.includes("霾")) {
      url = "https://ae01.alicdn.com/kf/Uf5f07c706b2c43f5be20935a5f558df6A.png";
    }
    else if (condition.includes("沙尘暴")) {
      url = "https://ae01.alicdn.com/kf/U2878e9e827064379b924138cee998936z.png";
    }
    else {
      url = "https://ae01.alicdn.com/kf/U1cd176c4255041cea210642d754ca506C.png";
    }
    return url;
  },

  //获得风向
  getWindDeriction: function (wind) {
    var result = "";
    var index = this.seperateWind(wind);
    //信息中不包含风速，风向为全部信息
    if (index == -1) {
      result = wind;
    }
    //信息中包含风速，截取出风向
    else {
      result = wind.substring(0, index);
    }
    return result;
  },

  //获得风速
  getWindSpeed: function (wind) {
    var result = "";
    var index = this.seperateWind(wind);
    //信息中不包含风速，风速为空
    if (index == -1) {
      result = "";
    }
    //信息中包含风速，截取出风速
    else {
      result = wind.substring(index, wind.length);
    }
    return result;
  },

  //将风向和风力分开，获得分隔的索引值
  seperateWind: function (wind) {
    var numPattern = /[0-9]/;
    var result = "";
    if (numPattern.test(wind)) {
      //风力信息中包含数字
      var pattern = new RegExp("[0-9]+");
      var res = wind.match(pattern);
      result = res.index;
    }
    else if (wind.search("微风")) {
      var res = wind.match("微风");
      result = res.index;
    }
    else {
      //风力信息中不包含数字
      result = -1;
    }
    return result;
  },

  //获得输入框中的文字
  inputing: function (e) {
    // console.log(e);
    this.setData({ inputCity: e.detail.value });
  },

  //查询按钮
  bindSearch: function () {
    if (this.data.inputCity == '') {
      wx.showModal({
        title: '提示',
        content: '请先输入要查询的城市名称',
        confirmText: '好的',
        confirmColor: '#ACB4E3',
        showCancel: false,
      });
    }
    else {
      //查询天气
      this.getWeather(this.data.inputCity);

      // 一键回到顶部
      this.setData({
        topNum: 0
      });
    }
  }
})