Question

When I change controller’s self.title, tab title also changes to that string.

Is it any workaround to avoid it?

Answer 1

From the documentation of UITabBarController:

If you do not provide a custom tab bar item for your view controller,
the view controller creates a default item containing no image and the
text from the view controller’s title property.

So you can either instantiate your own UITabBarItem and assign it to the view controller’s tabBarItem property.

Or simply just add a new property to your UIViewController that can store the string:

@property (nonatomic, copy) NSString *myTitle;

And then use that property instead:
self.myTitle = @"Your title here";