ion-slides / ion-slide-page指令无法正确呈现

I'm trying to implement the ion-slides/ion-slide-page directives into a page on an Ionic App (using an Ionic 1 codebase) I'm currently creating but I can't get each individual ion-slide-page directive to sit horizontally next to each other (with only the currently active page displaying - as per the animated GIF example here: I'm trying to implement the ion-slides/ion-slid