hide a button on checking a condition while the app enters foreground

Asked Apr 19 '16 at 09:03

Active Apr 19 '16 at 09:41

Viewed 45 times

I have to hide a button by checking two particular viewcontroller's view is a descendant of present view.This is being done when the app comes to foreground. Code:

 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationWillEnterForeground) name:UIApplicationWillEnterForegroundNotification object:nil] ;


(void)applicationWillEnterForeground
{
   if(!([hrViewController.view isDescendantOfView:self.view] || [reportViewController.view isDescendantOfView:self.view]))

{
[self.theFavouriteButton setHidden:YES];
}

}

And the problem is ,Eventhough the view presented while coming to foreground is hrViewController.view or reportViewController.view,the control is reaching inside the if condition and which is hiding my button.Why is this so?

edited Apr 19 '16 at 09:41

Wain

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asked Apr 19 '16 at 09:03

Vork

Why does it have to be done in the app delegate? – trojanfoe Apr 19 '16 at 09:06
Sorry I didnt get you.. – Vork Apr 19 '16 at 09:08
Why not do the work in the view controller itself; perhaps observing `UIApplicationDidBecomeActiveNotification`? – trojanfoe Apr 19 '16 at 09:09
try wrapping your setHidden in a GCD Main block (help here on GCD main blocks http://stackoverflow.com/questions/5606145/calling-a-method-on-the-main-thread) – Sean Lintern Apr 19 '16 at 09:21
Have you set a breakpoint to see which condition is true? – Paulw11 Apr 19 '16 at 10:20

hide a button on checking a condition while the app enters foreground

0 Answers0