how to hide UipickerViewController in applicationWillResignActive?

Question

I my application i want to hide the UIPickerview controller when application enter's in a paused state?

for eg: in my viewcontroller i am using uipickerview,and is placed in a popovercontroller,but i have not dismiss the popovercontroller and the application goes in a paused state. when user open the application the uipikcer view is displayed which i want to dismiss.

please help me out with this.

http://stackoverflow.com/questions/3105974/dismissing-uialertviews-when-entering-background-state/12976086#12976086 — Aman Aggarwal, Jan 08 '13 at 07:56
Write your dismiss code in - (void)viewWillDisappear:(BOOL)animated; — P.J, Jan 08 '13 at 07:57

score 2 · Accepted Answer · answered Jan 08 '13 at 08:04

Use NSNotificationCenter for hide the UIPickerView when application go in background like bellow...

[[NSNotificationCenter defaultCenter] addObserver:alertView selector:@selector(HidePickerView) name:@"UIApplicationWillResignActiveNotification" object:nil];

and hide the UIPickerView in bellow method..

- (void) HidePickerView {
      [yourPickerView setHidden:YES];
}

score 1 · Answer 2 · answered Jan 08 '13 at 08:04

You need to subscribe for the UIApplicationWillResignActiveNotification notification and when it's fired and your selector is called, you should [self.myPickerView dismissViewControllerAnimated:NO completion:nil];.
Note: -viewWillDisappear: method would not be called when the app is resigning active.

how to hide UipickerViewController in applicationWillResignActive?

2 Answers2