Odtnhj

I develop an ionic app with api, I add allow-control-allow-origin in my chrome so its running perfectly in browser but in real device my app dont run. I think api didnt read by my app. its displaying my toast "please check your network connection" someone help me. sorry for my english
this is my code

 let apiUrl = "http://mywebsite.com/api/public/api/";

 @Injectable()
 export class AuthServiceProvider 
 responseData:any;

 constructor(public http: Http) 
 console.log('Hello AuthServiceProvider Provider');
 

 postData(credentials, type)
 return new Promise((resolve, reject)=>
 let headers = new Headers();
 this.http.post(apiUrl+type, JSON.stringify(credentials), headers).subscribe(res=>
 resolve(res.json());
 , (err)=>
 reject(err);
 );
 );
 
 

and my login.ts

login()
let loading = this.loadingCtrl.create(
 spinner: 'crescent',
 content: 'Please wait...'
);
loading.present();
this.authService.postData(this.userData,'login').then((result) => 
this.responseData = result;
if(this.responseData.userData)
 console.log(this.responseData);
 localStorage.setItem('userData', JSON.stringify(this.responseData));
 loading.dismiss();
 this.navCtrl.push(TabsPage);
 
 else
 loading.dismiss();
 loading.onDidDismiss(() => 
 const toast = this.toastCtrl.create(
 message: 'Invalid Email or Password!',
 duration: 3000
 );
 toast.present();
 ); 
 
, (err) => 
 loading.dismiss();
 loading.onDidDismiss(() => 
 const toast = this.toastCtrl.create(
 message: 'Please Check Your Internet Connection',
 duration: 5000
 );
 toast.present();
 ); 
);