sign: function () {

var that = this

const la1 = 31.991362

const lo1 = 118.737908

wx.getLocation({

type: 'gcj02',

success: function (res) {

const la2 = res.latitude

const lo2 = res.longitude

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;//地球半径

s = Math.round(s * 10000) / 10000;

if (s > 0.2) {

wx.showToast({

title: '距离不够' + s,

icon: 'none'

})

console.log("距离不够" + s)

} else {

wx.showToast({

title: '签到成功',

icon: 'success'

})

console.log("sssssssss===" + s)

}

}

})

//判断是否获得了用户地理位置授权

wx.getSetting({

success: function(res){

if (!res.authSetting['scope.userLocation']){

wx.openSetting({

success: function (res) {

if (res.authSetting["scope.userLocation"]) {

wx.showToast({

title: '授权成功',

icon: 'success',

duration: 1000

})

}

}

})

}

}

})

}