How to get access to the POST button in SLComposeViewController?

Question

On the right top side there is disabled post button. How can I change its text or enable it manually?

    navigationBar.rightBarButtonItem?.enabled = true 

doesnt work

Answer 1

1. It is impossible to change its text.

2. It is possible to enable or disable it at any time by call validateContent():

   override func isContentValid() -> Bool {
       super.isContentValid()
   
       //valdate your SLComposeViewController here
   }
   

isContentValid() is called by validateContent().