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In actual projects, we often need to obtain the location information of the device to display to the customer, or use the location information as a parameter to continue to obtain some data from the server. Next, take the uni-app applet project as an example to introduce the idea of obtaining location information
提示：以下是本篇文章正文内容，下面案例可供参考
1. Related codes
- Determine whether the mobile phone location is authorized
// 定位授权
getLocation() {
let that = this;
// 1、判断手机定位服务【GPS】 是否授权
uni.getSystemInfo({
success(res) {
console.log("判断手机定位服务是否授权:", res);
let locationEnabled = res.locationEnabled; //判断手机定位服务是否开启
let locationAuthorized = res.locationAuthorized; //判断定位服务是否允许微信授权
if (locationEnabled == false || locationAuthorized == false) {
//手机定位服务（GPS）未授权
uni.showToast({
title: "请打开手机GPS",
icon: "none",
});
} else {
//手机定位服务（GPS）已授权
// 2、判断微信小程序是否授权位置信息
// 微信小程序已授权位置信息
uni.authorize({
//授权请求窗口
scope: "scope.userLocation", //授权的类型
success: (res) => {
that.fnGetlocation();
},
fail: (err) => {
err = err["errMsg"];
uni
.showModal({
content: "需要授权位置信息",
confirmText: "确认授权",
})
.then((res) => {
console.log(res);
if (res[1]["confirm"]) {
uni.openSetting({
success: (res) => {
if (res.authSetting["scope.userLocation"]) {
// 授权成功
uni.showToast({
title: "授权成功",
icon: "none",
});
that.fnGetlocation();
} else {
// 未授权
uni.showToast({
title: "授权失败,请重新授权",
icon: "none",
});
uni.showModal({
title: "授权",
content:
"获取授权" +
authouName +
"失败,是否前往授权设置？",
success: function (result) {
if (result.confirm) {
uni.openSetting();
}
},
fail: function () {
uni.showToast({
title: "系统错误！",
icon: "none",
});
},
});
}
},
});
}
if (res[1]["cancel"]) {
// 取消授权
uni.showToast({
title: "你拒绝了授权，无法获得周边信息",
icon: "none",
});
}
});
},
complete(res) {
// console.log('授权弹框', res);
if (res.errMsg == "authorize:ok") {
that.fnGetlocation();
} else {
uni.showModal({
title: "授权",
content:
"获取授权" + authouName + "失败,是否前往授权设置？",
success: function (result) {
if (result.confirm) {
uni.openSetting();
}
},
fail: function () {
uni.showToast({
title: "系统错误！",
icon: "none",
});
},
});
}
},
});
}
},
});
},
-
Determine whether the applet authorizes location information (the code is above)
-
Location acquisition
// 定位获取
fnGetlocation() {
let that = this;
uni.getLocation({
type: "wgs84", //默认为 wgs84 返回 gps 坐标
geocode: "true",
isHighAccuracy: "true",
accuracy: "best", // 精度值为20m
success: function (res) {
console.log("定位获取:", res);
let platform = uni.getSystemInfoSync().platform;
if (platform == "ios") {
//toFixed() 方法可把 Number 四舍五入为指定小数位数的数字。
that.bindList.long = res.longitude.toFixed(6);
that.bindList.lat = res.latitude.toFixed(6);
} else {
that.bindList.long = res.longitude;
that.bindList.lat = res.latitude;
}
that.bindList.longlat =
"经度" +
that.changeTwoDecimal_f(that.bindList.long) +
"/" +
"纬度" +
that.changeTwoDecimal_f(that.bindList.lat);
that.getAreaCode(res.latitude, res.longitude);
},
fail(err) {
if (
err.errMsg ===
"getLocation:fail 频繁调用会增加电量损耗，可考虑使用 wx.onLocationChange 监听地理位置变化"
) {
uni.showToast({
title: "请勿频繁定位",
icon: "none",
});
}
if (err.errMsg === "getLocation:fail auth deny") {
// 未授权
uni.showToast({
title: "无法定位，请重新获取位置信息",
icon: "none",
});
authDenyCb && authDenyCb();
that.isLocated = false;
}
if (
err.errMsg ===
"getLocation:fail:ERROR_NOCELL&WIFI_LOCATIONSWITCHOFF"
) {
uni.showModal({
content: "请开启手机定位服务",
showCancel: false,
});
}
},
});
},
- Obtain the area code by latitude and longitude coordinates
// getAreaCode通过经纬度(wgs84)坐标获取区域码
getAreaCode(latitude, longitude) {
this.$refs.uForm.resetFields();
var that = this;
that.$u.api
.getAreaCode({
latitude: latitude,
longitude: longitude,
})
.then((res) => {
if (res.code == 100000000) {
console.log("通过经纬度坐标获取区域码:", res);
// console.log(res, 'areaCode');
that.bindList.areaCode = res.data.areaCode;
that.bindList.specificAddress = res.data.detailLocation;
that.bindList.address = res.data.areaLocation;
} else {
uni.showToast({
title: res.msg, icon: "none" });
}
})
.catch((err) => {
this.loadState = "加载失败err";
console.log("getDevList_err:", err); //--------------------
});
},
2. Relevant data return
3. Effect display
at last
Tip: Here is a summary of the article:
the above is the approximate steps to obtain location information:
- Determine whether the mobile location service is authorized (uni.getSystemInfo)
- Determine whether the applet authorizes location information (uni.authorize)
- Get Location (uni.getLocation)
- Obtain the area code through the latitude and longitude coordinates, which is to obtain the back-end data by taking the latitude and longitude as parameters