Technical Considerations - The Personal Timeline

It's important to make sure that any technical requirements proposed by my app would work in practice should I hand it over to a development company. Most of the interactive areas I have included in my wireframe are detailed on Apple's technical guides (covered earlier in my research).

The only aspect of my app concept that I am unsure of, from a technical perspective, is the use of a draggable 'widget'  to access the personal timeline (see relevant Wireframe below). This works for the chat bubbles on the Facebook app, but when a chat window is open that screen becomes active, and if you click outside this screen then the app returns to the previous information. In my initial concept I wanted the user to be able to drag the personal timeline widget across the screen and then to click and drag on the assets they want to save and drop them into the personal timeline window. I have looked on several different websites for advice on whether this would be possible but have not found anything that convinces me it could be achieved successfully. Therefore I am going to re-think the way the user accesses the personal timeline.

I don't want to direct the user away from the main timeline if I can help it, because this is the main focus/function of the app. One way of maintaining the responsive feel of the other screens would be to add a new button at the top of the navigation bar (next to the help and settings icons) which when clicked would change the content on the timeline to the assets that the user has saved to their personal timeline. This would preserve the timeline throughout the entire app experience and the personal timeline icon would serve as a switch between the main timeline events and the users' own content. When the user is on the personal timeline screen, the icon would change to a Timeline icon to indicate that when clicked it would take them back to the main timeline.