How to fix the position of the keyboard?

Ionic Framework ionic-v3
1

Hi all,

I’m developing an iPhone application using ionic 2.
When I tap the input box in the page, the whole screen scrolls up, but I wanna fix the display position of the header part.
Also, I want to prevent the keyboard from covering elements of the page.

I understand that it is caused by using the input tag instead of ion-input.
However, This menu shows the web page created by React in IFRAME and can not be easily changed.
Changing the value of KeyboardShrinksView did not work,too.

If you have any good ideas, please let me know.
Thank you.