locationapi {#api}demo {#demo}location定位,使用系统自带的定位 api {#api}/** param (once:是否只定位一次)*/start(param,callback)demo {#demo} var location=weex.requireModule('location') location.start({once:true},(res)=>{ var modal=weex.requireModule('modal') modal.alert({message:res}) })