微信小程序在指定距离范围内签到
# 1.需要获取当前位置的经纬度
manifest 文件添加
"permission" : {
"scope.userLocation" : {
"desc" : "用户在需要获取当前经纬度位置在特定范围内签到"
}
},
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# 2. 小程序管理后台开通位置权限
# 3. 检查并提醒用户开启定位授权
// 授权地理位置函数
getUserLocation() {
let that = this
uni.getLocation({
type: 'gcj02',
success(res) {
that.latitude = res.latitude
that.longitude = res.longitude
that.showModal = true
},
fail(res) {
console.log('用户拒绝授权地理位置', res)
uni.showModal({
title: '提醒',
showCancel: true, // 不展示取消按钮
content: '您拒绝了位置授权，将无法使用签到功能，点击确定重新获取授权',
success(res) {
//如果点击确定
if (res.confirm) {
uni.openSetting({
success(res) {
//如果同意了位置授权则userLocation=true
if (res.authSetting["scope.userLocation"]) {
}
}
})
}
},
fail() {
}
})
}
})
},
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# 4. 判断代码
getDistances(lat1, lng1, lat2, lng2) {
var radLat1 = this.rad(lat1);
var radLat2 = this.rad(lat2);
var a = radLat1 - radLat2;
var b = this.rad(lng1) - this.rad(lng2);
var s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) +
Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)));
s = s * 6378.137; // EARTH_RADIUS;
// 输出为公里
s = Math.round(s * 10000) / 10000;
var distance = s;
var distance_str = "";
if (parseInt(distance) >= 1) {
distance_str = distance.toFixed(2) + "km";
} else {
distance_str = (distance * 1000).toFixed(2) + "m";
}
//小小修改，这里返回对象
let objData = {
distance: distance,
distance_str: distance_str
}
return objData
},
let judgeDistance = this.getDistances(this.latitude, this.longitude, this.courseDetail.latitude, this
.courseDetail.longitude).distance // 获得的公里数
let distanceMetre = (judgeDistance * 1000).toFixed(2)
if (Number(distanceMetre) > this.courseDetail.signRange) {
uni.showToast({
title: '您不在签到的范围内',
icon: 'none',
duration: 2000
})
}
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上次更新: 2023/07/04, 15:58:30