Problem with navigation and headers


I have header and subheader with some elements; 2 select inputs, hamburger menu and logo. I need to add functional “back” button. When i use ion-nav-view “back” button is avalible, but I have problems to made my custom headers.

<ion-header-bar class="bar-positive">
            <select name="lang" form="lang_form">
              <option value="eng">ENG</option>
              <option value="fr">FR</option>
            <select name="currency" form="currency_form">
              <option value="gpb">GPB</option>
              <option value="pln">PLN</option>
            <img class="cart" src="css/img/cart.svg">
          <ion-header-bar class="bar-subheader">
            <img class="hamburger" src="css/img/hamburger.svg">
            <img class="logo" src="css/img/logo.svg">

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