// 返回距离
export function distance(lat1, lng1, lat2, lng2) {
	var that = this;
	let rad1 = lat1 * Math.PI / 180.0;
	let rad2 = lat2 * Math.PI / 180.0;
	let a = rad1 - rad2;
	let b = lng1 * Math.PI / 180.0 - lng2 * Math.PI / 180.0;
	let s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(rad1) *
		Math.cos(
			rad2) * Math.pow(
			Math.sin(b / 2), 2)));
	s = s * 6378.137;
	s = Math.round(s * 10000) / 10000;
	s = s.toString();
	s = s.substring(0, s.indexOf('.') + 2);
	return s
}

// 登录
export function userLogin() {
	let that = this;
	let promise = new Promise((resolve, reject) => {
		uni.login({
			provider: 'weixin',
			success: async function(loginRes) {
				let { code } = loginRes;
				let res = await that.$u.api.wxLogin({ code })
				if (res.code === 200) {
					resolve(res);
					// that.$store.commit('setToken', res.data.token)
					// that.$store.commit('setUserInfo', res.data.userResponse)
				} else {
					reject(err)
				}
			}
		});
	})
	return promise;
}