微信小程序地图操作比较简单,api也很少,使用map组件来展示。说到地图,那就先来看基础定位:
定位用到wx.getLocation(OBJECT)函数,代码如下:

wx.getLocation({
  type: 'wgs84',
  success: function(res) {
    var latitude = res.latitude
    var longitude = res.longitude
    var speed = res.speed
    var accuracy = res.accuracy
  }
})

定位成功会返回四个参数值,如下:

 
 

map属性太多,先看一下:

 
 

如果用到地图,基本上所有属性都会用到。
下面一一看一下,我们先看效果图吧,先看真相:

 
 

这里我只用了一个markers,就是定位当前位置的红色markers,用法如下:

 wx.getLocation({
      type: 'wgs84', // 默认为 wgs84 返回 gps 坐标,gcj02 返回可用于 wx.openLocation 的坐标
      success: function (res) {

        _this.setData({
          latitude: res.latitude,
          longitude: res.longitude,
          markers: [{
            id: "1",
            latitude: res.latitude,
            longitude: res.longitude,
            width: 50,
            height: 50,
            iconPath: "/assests/imgs/my.png",
            title: "哪里"

          }],
          circles: [{
            latitude: res.latitude,
            longitude: res.longitude,
            color: '#FF0000DD',
            fillColor: '#7cb5ec88',
            radius: 3000,
            strokeWidth: 1
          }]

        })
      }

    })

这里加了circles,半径是3000米,具体的api可自行看官网

接下来看看controls,控制层,在地图上显示控件,控件不随着地图移动,看API:

 
 

注意看示例图的右上角,有两个按钮,加减号,是控制地图scale的数值变化,动态缩放地图的,controls用法也很简单:

 controls: [{
      id: 1,
      iconPath: '/assests/imgs/jian.png',
      position: {
        left: 320,
        top: 100 - 50,
        width: 20,
        height: 20
      },
      clickable: true
    },
    {
      id: 2,
      iconPath: '/assests/imgs/jia.png',
      position: {
        left: 340,
        top: 100 - 50,
        width: 20,
        height: 20
      },
      clickable: true
    }
    ]

最后我们看一张gif图:

 
 

最后上一下具体代码:
wxml:

  <map id="map" longitude="{{longitude}}" latitude="{{latitude}}" scale="{{scale}}" controls="{{controls}}" bindcontroltap="controltap" markers="{{markers}}" circles="{{circles}}" bindmarkertap="markertap" polyline="{{polyline}}" bindregionchange="regionchange" show-location style="width: 100%; height: {{view.Height}}px;"></map>

js:

Page({
  data: {
    Height: 0,
    scale: 13,
    latitude: "",
    longitude: "",
    markers: [],
    controls: [{
      id: 1,
      iconPath: '/assests/imgs/jian.png',
      position: {
        left: 320,
        top: 100 - 50,
        width: 20,
        height: 20
      },
      clickable: true
    },
    {
      id: 2,
      iconPath: '/assests/imgs/jia.png',
      position: {
        left: 340,
        top: 100 - 50,
        width: 20,
        height: 20
      },
      clickable: true
    }
    ],
    circles: []

  },

  onLoad: function () {
    var _this = this;

    wx.getSystemInfo({
      success: function (res) {
        //设置map高度,根据当前设备宽高满屏显示
        _this.setData({
          view: {
            Height: res.windowHeight
          }

        })

      }
    })

    wx.getLocation({
      type: 'wgs84', // 默认为 wgs84 返回 gps 坐标,gcj02 返回可用于 wx.openLocation 的坐标
      success: function (res) {

        _this.setData({
          latitude: res.latitude,
          longitude: res.longitude,
          markers: [{
            id: "1",
            latitude: res.latitude,
            longitude: res.longitude,
            width: 50,
            height: 50,
            iconPath: "/assests/imgs/my.png",
            title: "哪里"

          }],
          circles: [{
            latitude: res.latitude,
            longitude: res.longitude,
            color: '#FF0000DD',
            fillColor: '#7cb5ec88',
            radius: 3000,
            strokeWidth: 1
          }]

        })
      }

    })

  },

  regionchange(e) {
    console.log("regionchange===" + e.type)
  },

  //点击merkers
  markertap(e) {
    console.log(e.markerId)

    wx.showActionSheet({
      itemList: ["A"],
      success: function (res) {
        console.log(res.tapIndex)
      },
      fail: function (res) {
        console.log(res.errMsg)
      }
    })
  },

  //点击缩放按钮动态请求数据
  controltap(e) {
    var that = this;
    console.log("scale===" + this.data.scale)
    if (e.controlId === 1) {
      // if (this.data.scale === 13) {
      that.setData({
        scale: --this.data.scale
      })
      // }
    } else {
      //  if (this.data.scale !== 13) {
      that.setData({
        scale: ++this.data.scale
      })
      // }
    }

  },

})

祝大家学习愉快。 

转自:https://www.jianshu.com/p/01efa02134ba