I have read the other posts here and trying all the things they say, but still is not working for me, I really need to add a right bar button item, I have tried in code (doesn't work for me) and I found something that might help me but, I don't know where is it in the interface of xCode, here is the image I found:
Can someone tell me how to make this work please?
Here is my storyboard at the left (the color changes) and the simulator at the right, and as you can see in the storyboard it shows my barButtonItem but when I run it it doesn't shows.
It seems like you are not following the correct steps to add the right bar button. It can be easily done through storyboard itself and it doesn't requires to modify any property of the navigation bar. Also looking on the images of the storyboard and simulator you shared shows some inconsistency, it would be more clear if you can elaborate on the steps you followed to add the right bar button item, how are you adding it to the navigation bar and how are you connecting your view controller to the presenting View controller.
The usual Steps I follow is :
I hope this would work for you :)