import React, {Component} from 'react';
    import {Text, View,TextInput,Button,Alert,Switch} from 'react-
     native';

     import TimerMixin from 'react-timer-mixin';

    export default class home extends React.Component {

    constructor(props) {
     super(props)

     this.state = {switchstate:false,timer:null};

     var timer = setInterval(this.tick, 1000);
       this.setState({timer});

      }
    tick=async()=>{


    return await console.log('asdas','iam printing')
    }

    toogleswitchstate=()=>{


    if(this.state.switchstate==false){

    this.setState({switchstate:true})



    }else if(this.state.switchstate==true){


    this.setState({switchstate:false})
     clearInterval(this.timer);

    //geolocation.stopObserving();
     }

     console.log(this.state.switchstate)
      }

    render() {
    return (



      <View style={{flex:1,flexDirection:'column',justifyContent:'space-evenly',alignItems:'center',backgroundColor:datum.secondaryColor}}>

    <Button
title={String(this.state.switchstate)}
onPress={()=>this.toogleswitchstate()}
/>

      </View>

    );
  }
}