How does apple feel about blocking tabs from being clickable until for example when the user has clicked on a uitableview row on another tab?
Sometimes you may not want the content of another tab being accessible until a certain criteria has been met.
Example:
Playlist Search Played Settings
In this case I don’t want the user to click on Search tab before having chosen a playlist in the Playlist tab.
Is this enough for the app to not be approved on the appstore?
You should do something similar to the music app, show an empty tab with an explanation as to why this tab is empty. Like this: