在编辑模式下进行多项选择并将数据传递到其他位

I have a Tabview with two tabs (My Stories and Favorites). When I enter edit mode in My Stories, I want to be able to select multiple stories to add to Favorites. Code I have, work to a certain extent. I can select multiple stories, but when I press button "Add Favorite", only the last story I selected gets added to Favorites. I can't figure out how to store all the selected stories into Favorites. Here's the relevant code:I have a Tabview with two tabs (My Stories and