CustomSegue | Custom segue for OSX Storyboards | iOS library

I have a table view with collection view inside table rows. structure is next:

MainViewController.swift:

I am trying to pass the selection of UIPickerView as a string to a new ViewController, unfortunately when I do it is returning a nil value. I have been following a few different tutorials but I cannot seem to get it to work. Any suggestions would be appreciated.

I have two view controllers where I use a regular Show Segue (Right to Left) to go in one direction and a custom segue (Left to Right) to go in the other direction. I don't think I should do an unwind because neither VC is subordinate to other and using these segues means one navigation controller manages things.

In the upper left hand corner of both VCs I have a common BarButton containing a profile photo.

When using the regular Right to Left Segue, the profile photo on the bar button remains unchanged. This looks great as the rest of the screen moves in but the element common to both, the profile photo stays in place.

In the other direction (Left to Right), however, using the custom segue, the entire VC screen including the navigation bar swoops in and you basically see the profile photo come in from the left edge before resting in the normal left bar button position where the same photo was a moment earlier. This looks bad.

Is there any way to force a common element in the navigation bar to stay in place during a custom segue to better mimic the behavior of the system show segue?

Thanks in advance for any suggestions.

Here is my code for the custom segue:

I have subclassed UIStoryboardSegue to create a Left to Right Segue. The segue works, however, there is a black vertical bar or background that is momentarily visible between the two View Controllers that mars the effect. (I want the segue to look like a normal right to left show segue but in the opposite direction). Does anyone know what could be causing this or how to get rid of it? Here is my code:

Since I'm new to Ios , What i wanted to is given demonstration bellow

That means, on over the image and some text will remain static but , bellow a sliding menu would work like the gif. if I tap on some menu item it will slide to bring related menu. if I press on the cross it will act back ward. I don't even know what does it call. I tried with customsegue and transitions. but no luck . also tried with transparent show modally. it works for one view but not for backword (i.e. unwinding) . it get darker.

I have an app that pulls objects from Firebase, then displays them in a table. I've noticed that if I delete 5 entries (this is about when I get to the reused cells that were deleted), I can't delete any more (red delete button is unresponsive) & can't even select the cells. This behavior stops when I comment out override func prepareForReuse() in the TableViewCell.swift controller. Why???

The rest of the app functions normally while the cells are just unresponsive. Weirdly, if I hold one finger on a cell and tap the cell with another finger, I can select the cell. Then, if I hold a finger on the cell and tap the delete button, that cell starts acting normally again. What is happening here??? Here is my code for the table & cells:

In CustomTableViewCell.swift >>