Are you using the ion-nav-bar? Do you want it on one view or every view?
Here is a post on putting inputs into the navigation bar:
It will be hacky to have a search bar take up the entire ion-nav-bar since you will have to override any navigation. Here’s a post where the search is just in the title:
I also recommend you check out this ion-filter-bar that @djett created, it’s a little more advanced, but it adds a search bar with animation: