Dynamic changing of title in nav-bar

I have a slide-box with three slides and I want the title in the nav-bar to change as I move through the slides. The ion-slide-box is contained within a ion-view which has view-title attribute. I tried creating a controller which reads the currentIndex() of the slide and returns an object with the title I want. But i can’t seem to be able to bind the returned object into the <ion-view view-title={{property.value}}>. Also I can only get the controller to work on-slide-changed so the initial slide does not return the object but subsequent slides do.

Any help with this?