IOS: How to hide prompt area in NavigationItem

Question

I set prompt text for NavigationItem, and set a timer to remove it like below:

- (void)timerFire_HidePromote:(NSTimer*) theTimer
{
    [self.navigationItem setPrompt:@""];
}

The text can be removed, but the space of the prompt still here, how can I hide all prompt area?

Answer 1

Replace this piece of code:

[self.navigationItem setPrompt:@""];

With this:

[self.navigationItem setPrompt:nil];