How can I change the StatusBar's style in single Page?

The StatusBar on this page is different from other pages, so how can I change it?
I tryed this.
in app.component.ts:

    platform.ready().then(() => {
        // Okay, so the platform is ready and our plugins are available.
        // Here you can do any higher level native things you might need.

then in special page:

    ionViewDidLoad() {

   ngOnInit() {

not working, anyone can help me, please? thanks.