這兩天在看小程序的地圖，寫寫筆記記錄一下

小程序官方文檔提供的方法

https://mp.weixin.qq.com/debug/wxadoc/dev/api/location.html

騰訊地圖提供的jssdk

http://lbs.qq.com/qqmap_wx_jssdk/qqmapwx.html

根據提示使用騰訊地圖jssdk需要申請，在實例化的時候填入密匙，接下來就可以使用他提供的各種方法了

我先說說我做關鍵詞搜索和點擊搜索結果進行路線規劃(規劃目前可能只是按自駕的路線，不完善的地方麻煩大家賜教了)

搜索我先使用getLocation獲取當前位置坐標

wx.getLocation({
      type: 
 
‘wgs84‘,
      success: function (res) {
        latitude = res.latitude
        longitude = res.longitude
        var speed = res.speed
        var accuracy = res.accuracy
      },
      fail: function (res) {
        console.log(res)
      },
      complete: function (res) {
        console.log(‘Complete‘)
      }
    }) 
 

接著利用獲取到的城市坐標獲取城市名字

qqmapsdk.reverseGeocoder({
      location: {
        latitude: latitude,
        longitude: longitude
      },
      success: function(res){
        //console.log(res)
        cityName = res.result.address_component.city
        console.log(cityName)
      },
      fail: function
 
 (res) {
        console.log(res);
      },
      complete: function (res) {
        console.log(‘獲取當前城市完成‘);
      }
    })

然後調用getSuggestion方法進行當前城市的關鍵詞搜索顯示功能(將獲取到的關鍵詞循環顯示在搜索下面，給便利出來的每個選項加個點擊事件)

qqmapsdk.getSuggestion({
      keyword: inputData,
      region: cityName,
      success: function (res) {
        let searchData = res.data
        console.log(searchData);
        that.setData({searchPlace: searchData})
      },
      fail: function (res) {
        console.log(res);
      },
      complete: function (res) {
        console.log(res);
      }
    });

點擊所選地名進行地名的坐標存儲

placeChoose: function (options){
    //console.log(options)
    let location = options.currentTarget.dataset.location
    wx.setStorageSync(‘location‘, location)
    console.log(wx.getStorageSync(‘location‘))
    wx.navigateBack({
      // 返回的頁面數
      data: 1
    })
  }

進行線路規劃(畫路線)

//前往搜索地
  goSearchPlace: function(){
    let that = this
    let searchLat = wx.getStorageSync(‘location‘).lat
    let searchLon = wx.getStorageSync(‘location‘).lng
    wx.request({
      url: ‘https://apis.map.qq.com/ws/direction/v1/driving/?from=24.488476,118.096247&to=‘ + searchLat + ‘,‘ + searchLon + ‘&output=json&callback=cb&key=22VBZ-REEK5-WVSI7-QKCOP-QPM6E-W7BPO‘,
      success: function (res) {
        coors = res.data.result.routes[0].polyline
        for (var i = 2; i < coors.length; i++) {
          coors[i] = coors[i - 2] + coors[i] / 1000000
        }
        console.log(coors)
        that.project()
      }
    })
  }

畫線路函數我單獨抽出來

project: function(){
    var b=[]
    for (var i=0;i<coors.length;i=i+2){
      b[i / 2] = {
        latitude: coors[i], longitude: coors[i + 1]
      }
      console.log(b[i / 2])
    }
    console.log(b.length)
    that2.setData({
      polyline: [{
        points: b,
        color: "#9999FF",
        width: 4,
        dottedLine: false
      }]
    })
  }

小程序地圖的使用筆記