小程序地图的使用笔记

Posted 2020-10-13 FarmanKKK

这两天在看小程序的地图，写写笔记记录一下

小程序官方文档提供的方法

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

腾讯地图提供的jssdk

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

根据提示使用腾讯地图jssdk需要申请，在实例化的时候填入密匙，接下来就可以使用他提供的各种方法了

我先说说我做关键词搜索和点击搜索结果进行路线规划(规划目前可能只是按自驾的路线，不完善的地方麻烦大家赐教了)

搜索我先使用getLocation获取当前位置坐标

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\')
      }
    }) 

接着利用获取到的城市坐标获取城市名字

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(\'获取当前城市完成\');
      }
    })

然后调用getSuggestion方法进行当前城市的关键词搜索显示功能(将获取到的关键词循环显示在搜索下面，给便利出来的每个选项加个点击事件)

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);
      }
    });

点击所选地名进行地名的坐标存储

placeChoose: function (options){
    //console.log(options)
    let location = options.currentTarget.dataset.location
    wx.setStorageSync(\'location\', location)
    console.log(wx.getStorageSync(\'location\'))
    wx.navigateBack({
      // 返回的页面数
      data: 1
    })
  }

进行线路规划(画路线)

//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()
      }
    })
  }

画线路函数我单独抽出来

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
      }]
    })
  }