Question

Trying to save button state as hidden when navigating off the view controller.

under IBAction

    btnonce.hidden = YES; 

   NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
  [defaults setValue:Act1Button.hidden forKey:@"isHidden"];

Calling it in ViewDidLoad

NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
btnonce.hidden = [userDefaults valueForKey:@"isHidden"];

I’m getting the error: Implicit conversion of “BOOL” (aka signed char) to ID is disallowed with ARC

How to rectify this?

Answer 1

For saving the Bool value in NSUserDefaults use this code

 [defaults setBool:Act1Button.hidden forKey:@"isHidden"];

For retrieving use this

btnonce.hidden = [userDefaults boolForKey:@"isHidden"];