百度地圖 getCurrentPosition很大的幾率返回結(jié)果為null

有一半的幾率都返回空的對(duì)象,有幾率又有結(jié)果，這樣用不了...

<script type="text/javascript" src="http://api.map.baidu.com/api?...;ak=QkxUkfoyrAVOF2mNqUOw9krqbXNx6IRL"></script>
<script type="text/javascript">

    function bd_position() { //百度定位
        var geolocation = new BMap.Geolocation();
        geolocation.getCurrentPosition(function(r){
            if(this.getStatus() == BMAP_STATUS_SUCCESS){
                        console.log(r.address);
            }
            else {
                     console.log('failed');
            }        
        },{
            enableHighAccuracy: true
        })
   }
</script>