Open page two inside the body of page one using Cupertino Segmented Control

I am using Cupertino Segmente Control , I created a tab using three swings and assigned three widgets to the front page body. When selecting any of the tabs, it displays the body of the new widget. So far, everything works fine. Products are loaded inside each page, and when we select a product, it must go to the second page .The second page opens, but inside the body of the first page. If you help me, thank you very much

this is my images app