微信小程序地圖操作比較簡單令境,api也很少,使用map組件來展示枪芒。說到地圖铲球,那就先來看基礎(chǔ)定位:
定位用到wx.getLocation(OBJECT)函數(shù)挺庞,代碼如下:
wx.getLocation({
type: 'wgs84',
success: function(res) {
var latitude = res.latitude
var longitude = res.longitude
var speed = res.speed
var accuracy = res.accuracy
}
})
定位成功會返回四個參數(shù)值,如下:
map屬性太多稼病,先看一下:
如果用到地圖选侨,基本上所有屬性都會用到。
下面一一看一下然走,我們先看效果圖吧援制,先看真相:
這里我只用了一個markers,就是定位當前位置的紅色markers芍瑞,用法如下:
wx.getLocation({
type: 'wgs84', // 默認為 wgs84 返回 gps 坐標晨仑,gcj02 返回可用于 wx.openLocation 的坐標
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
}]
})
}
})
這里加了circles,半徑是3000米拆檬,具體的api可自行看官網(wǎng)洪己。
接下來看看controls,控制層竟贯,在地圖上顯示控件答捕,控件不隨著地圖移動,看API:
注意看示例圖的右上角澄耍,有兩個按鈕噪珊,加減號晌缘,是控制地圖scale的數(shù)值變化齐莲,動態(tài)縮放地圖的,controls用法也很簡單:
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
}
]
最后我們看一張gif圖:
最后上一下具體代碼:
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) {
//設(shè)置map高度磷箕,根據(jù)當前設(shè)備寬高滿屏顯示
_this.setData({
view: {
Height: res.windowHeight
}
})
}
})
wx.getLocation({
type: 'wgs84', // 默認為 wgs84 返回 gps 坐標选酗,gcj02 返回可用于 wx.openLocation 的坐標
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)
},
//點擊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)
}
})
},
//點擊縮放按鈕動態(tài)請求數(shù)據(jù)
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
})
// }
}
},
})
祝大家學(xué)習(xí)愉快。