微信小程序高德地圖獲取當(dāng)前定位## 微信小程序

//定位方法
getUserLocation: function () {
var _this = this;
wx.getSetting({
success: (res) => {
// res.authSetting[‘scope.userLocation’] == undefined 表示 初始化進(jìn)入該頁(yè)面
// res.authSetting[‘scope.userLocation’] == false 表示 非初始化進(jìn)入該頁(yè)面,且未授權(quán)
// res.authSetting[‘scope.userLocation’] == true 表示 地理位置授權(quán)
if (res.authSetting[‘scope.userLocation’] != undefined && res.authSetting[‘scope.userLocation’] != true) {
//未授權(quán)
wx.showModal({
title: ‘請(qǐng)求授權(quán)當(dāng)前位置’,
content: ‘需要獲取您的地理位置，請(qǐng)確認(rèn)授權(quán)’,
success: function (res) {
if (res.cancel) {
//取消授權(quán)
wx.showToast({
title: ‘拒絕授權(quán)’,
icon: ‘none’,
duration: 1000
})
} else if (res.confirm) {
//確定授權(quán)，通過(guò)wx.openSetting發(fā)起授權(quán)請(qǐng)求
wx.openSetting({
success: function (res) {
if (res.authSetting[“scope.userLocation”] == true) {
wx.showToast({
title: ‘授權(quán)成功’,
icon: ‘success’,
duration: 1000
})
//再次授權(quán)，調(diào)用wx.getLocation的API
_this.gaodeGetLocation();
} else {
wx.showToast({
title: ‘授權(quán)失敗’,
icon: ‘none’,
duration: 1000
})
}
}
})
}
}
})
} else if (res.authSetting[‘scope.userLocation’] == undefined) {
//用戶首次進(jìn)入頁(yè)面,調(diào)用wx.getLocation的API
_this.gaodeGetLocation();
}else {
console.log(‘授權(quán)成功’)
//調(diào)用wx.getLocation的API
_this.gaodeGetLocation();
var page = getCurrentPages().pop();
if (page == undefined || page == null) return;
page.onLoad();
}
}
})
},
//通過(guò)兩點(diǎn)經(jīng)緯度計(jì)算距離（KM）
distance:function(la1, lo1, la2, lo2) {
var La1 = la1 * Math.PI / 180.0;
var La2 = la2 * Math.PI / 180.0;
var La3 = La1 - La2;
var Lb3 = lo1 * Math.PI / 180.0 - lo2 * Math.PI / 180.0;
var s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(La3 / 2), 2) + Math.cos(La1) * Math.cos(La2) * Math.pow(Math.sin(Lb3 / 2), 2)));
s = s * 6378.137;//地球半徑
s = Math.round(s * 10000) / 10000;
console.log(“計(jì)算結(jié)果”,s);
return s;
},
//高德地圖獲取定位
gaodeGetLocation:function(){
var that = this;
var myAmapFun=new aMap.AMapWX({key:’*********自己的高德地圖key’});
myAmapFun.getRegeo({
success:(res)=>{
console.log(res)
wx.setStorageSync(‘gaodeAddress’,res[0].regeocodeData.addressComponent.city)
//console.log(“高德地圖獲取定位:”+JSON.stringify(res),res[0].regeocodeData.formatted_address);
//計(jì)算兩個(gè)經(jīng)緯度距離
var jl = that.distance(39.928712, 116.393345, res[0].latitude, res[0].longitude);
console.log(“打印計(jì)算兩個(gè)點(diǎn)的距離:”+jl);
this.setData({
gaodeAddress:res[0].regeocodeData.addressComponent.city,
})
}
})
},

總結(jié)

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