ios - Printing arrays to screen in React Native -

i want print couple of arrays on screen in react native ios app. right nothing showing on screen. console.logs after loop show arrays have data supposed have, not reflected on screen. how render again after fetch call has loaded? here's code:

'use unique' import react, { component } 'react'; import {   stylesheet,   touchablehighlight,   text,   view,   listview } 'react-native';  import api './apicall';  class apirequest extends component {    constructor() {     super();      this.state = {       users: [],       id: [],       type: []     }   }    componentwillmount() {        api.getdata()         .then((res) => {           this.setstate({             users: res           })           (var = 0; < this.state.users.length; i++) {             this.state.id.push(this.state.users[i].id);             this.state.type.push(this.state.users[i].type);       });   }    render() {     return(       <view style={styles.container}>         <text style={styles.buttontext}>           {this.state.id}         </text>       </view>     );   } } 

this.state.id.push(this.state.users[i].id); this.state.type.push(this.state.users[i].type); 

that's wrong way set new state. should following:

var idarray = []; var typearray = []; (var = 0; < this.state.users.length; i++) {   idarray.push(this.state.users[i].id);   typearray.push(this.state.users[i].type); } this.setstate({id: idarray});