小程序計算兩者商家與用戶之間的距離
阿新 • • 發佈：2018-11-12
scale ets string else hset round true 程序 auth
getUserLocation: function () {
let vm = this;
wx.getSetting({
success: (res) => {
console.log(JSON.stringify(res))
// res.authSetting[‘scope.userLocation‘] == undefined 表示 初始化進入該頁面
// res.authSetting[‘scope.userLocation‘] == false 表示 非初始化進入該頁面,且未授權
// res.authSetting[‘scope.userLocation‘] == true 表示 地理位置授權
if (res.authSetting[‘scope.userLocation‘] != undefined && res.authSetting[‘scope.userLocation‘] != true) {
wx.showModal({
title: ‘請求授權當前位置‘,
content: ‘需要獲取您的地理位置，請確認授權‘,
success: function (res) {
if (res.cancel) {
wx.showToast({
title: ‘拒絕授權‘,
icon: ‘none‘,
duration: 1000
})
} else if (res.confirm) {
wx.openSetting({
success: function (dataAu) {
if (dataAu.authSetting["scope.userLocation"] == true) {
wx.showToast({
title: ‘授權成功‘,
icon: ‘success‘,
duration: 1000
})
//再次授權，調用wx.getLocation的API
vm.getLocation();
} else {
wx.showToast({
title: ‘授權失敗‘,
icon: ‘none‘,
duration: 1000
})
}
}
})
}
}
})
} else if (res.authSetting[‘scope.userLocation‘] == undefined) {
//調用wx.getLocation的API
vm.getLocation();
}
else {
//調用wx.getLocation的API
vm.getLocation();
}
}
})
},
// 獲取用戶的當前位置
getLocation: function () {
let that= this;
wx.getLocation({
type: ‘wgs84‘, success: function (res) { var la1 = res.latitude var lo2 = res.longitude that.setData({ la1: la1, lo2: lo2, scale:28 }) that.getShangjia(la1, lo2); }
}) }, 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("計算結果", s) this.setData({ s: s }) }, //商家 getShangjia: function (la1, lo2) { var that = this; app.util.request({ ‘url‘: ‘entry/wxapp/Shangjia‘, success: function (res) { console.log(res.data.data); var shangjia = res.data.data for (var i = 0; i < shangjia.length; i++) { that.distance(la1, lo2, shangjia[i].s_latitude, shangjia[i].s_longitude) shangjia[i].s_shopjuli = that.data.s; } that.setData({ shangjia: res.data.data }) }, fail: function (err) { console.log(err) }, }); },
type: ‘wgs84‘, success: function (res) { var la1 = res.latitude var lo2 = res.longitude that.setData({ la1: la1, lo2: lo2, scale:28 }) that.getShangjia(la1, lo2); }
}) }, 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("計算結果", s) this.setData({ s: s }) }, //商家 getShangjia: function (la1, lo2) { var that = this; app.util.request({ ‘url‘: ‘entry/wxapp/Shangjia‘, success: function (res) { console.log(res.data.data); var shangjia = res.data.data for (var i = 0; i < shangjia.length; i++) { that.distance(la1, lo2, shangjia[i].s_latitude, shangjia[i].s_longitude) shangjia[i].s_shopjuli = that.data.s; } that.setData({ shangjia: res.data.data }) }, fail: function (err) { console.log(err) }, }); },
小程序計算兩者商家與用戶之間的距離