Use the onLocationChange method to continuously monitor the address, and judge whether to use the latitude and longitude of this positioning according to the positioning accuracy field.
7. Relatively accurate acquisition of latitude and longitude addresses
1. Register an account
Just enter the information
Tencent Location Services - Based on Ecology, Connecting to the Future
2. Create application and key
1. Enter the console
2. Create an app
3. Create Key
Enable the product, check WebServiceAPI and WeChat applet, and fill in the corresponding information.
3. Log in to the backstage of the WeChat public platform
Add request legal domain name: https://apis.map.qq.com
Development Management - Development Settings - Server Domain Name - Modify
4. Download the WeChat applet JavaScript SDK
After downloading, put it in your own project
WeChat Mini Program JavaScript SDK | Tencent Location Services
Five, code implementation
var QQMap = require('../../js_sdk/qqmap-wx-jssdk.min.js') // SDK放置的路径
var qqmapsdk = new QQMap({
key: '**************' // 自己的Key
});
6. Generally obtain the latitude and longitude address
In more prosperous places, this is generally enough.
wx.getLocation({
type: 'wgs84',
success: res => {
console.log(res); //获取到经纬度值
qqmapsdk.reverseGeocoder({ // 根据经纬度转化为地址
location: {
latitude: res.latitude,
longitude: res.longitude
},
success: res => {
console.log(res);
}
})
}
});
7. Relatively accurate acquisition of latitude and longitude addresses
1. Obtain permission to monitor location
uni.authorize({
scope: 'scope.userLocation',
success(res) {
console.log(res);
}
})
2. Turn on location monitoring
wx.startLocationUpdate({
success: res => {
console.log(res);
},
fail: res => {
console.log(res);
//在这里处理开启失败的业务逻辑
}
})
3. Monitor real-time geographic location changes
let index = 0;
const _locationChangeFn = function(res) {
console.log('location change', res)
index++;
//res.accuracy 代表定位精度， 这里根据定位精度和定位次数进行一个综合判断，根据用户在当前页面的停留时间进行相应的修改
if (index > 10 || (res.accuracy < 35 && index > 5)) {
wx.offLocationChange();
wx.stopLocationUpdate();
qqmapsdk.reverseGeocoder({// 根据经纬度转化为地址
location: {
//纬度
latitude: res.latitude,
//经度
longitude: res.longitude
},
success: function(res1) {
console.log(res1.result);
},
fail: function(res1) {
console.log(res1);
}
})
}
}
//监听实时地理位置变化事件
wx.onLocationChange(_locationChangeFn)The addresses located in this way may be similar, but the latitude and longitude are more accurate than those obtained directly with getLocation.