在ios中原生的h5方法navigator.geolocation.getCurrentPosition无法获取定位，
高德地图提供了一套解决办法
直接上代码

	//引入，最好在本地下载
  <scripttype="text/javascript"src="http://a.amap.com/jsapi_demos/static/remogeo/remogeo.js"></script>
  
  if(navigator.platform==='iPhone'){
            let remoGeo = new RemoGeoLocation();
            navigator.geolocation.getCurrentPosition = function () {
                return remoGeo.getCurrentPosition.apply(remoGeo, arguments);
            };
            navigator.geolocation.watchPosition = function () {
                return remoGeo.watchPosition.apply(remoGeo, arguments);
            };
        }