You can do it like this:
In your .h file declare your property
@property(nonatomic, weak) IBOutlet UIButton *yourBtn;
Link this property to your button in storyboard
In your .m file
-(void)viewDidLoad
{
[super ViewDidLoad];
[self.yourBtn setHidden:YES];
}
Later on in your code if you need to enable your button just call
[self.yourBtn setHidden:NO];