iOS ARC UIAlertView leaking memory

Question

I have simple method showing AlertView with textfield. Instruments showing memory leak in this. Please explain.

- (void)method {
NSString *value = [[NSUserDefaults standardUserDefaults] valueForKey:@"key"];
if (value == nil) {

    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Title" message:@"message" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];

    alertView.tag = 101;
    alertView.alertViewStyle = UIAlertViewStylePlainTextInput;
    UITextField *txtGroup = [alertView textFieldAtIndex:0];
    [txtGroup becomeFirstResponder];

    [alertView show];
    alertView = nil;
}
}

Please find the screenshot of Instruments:

I read somewhere, to release an object it need to set to nil after use. — PK86, May 05 '17 at 07:23
From here, http://blog.harbinger-systems.com/2014/04/ios-memory-management-and-arc/ — PK86, May 05 '17 at 07:23
Yes. Agree but when you are showing alert view means still it's in the hierarchy and you are making it to nil immediately. In ARC it will take care of it. If you want to do it, do it after usage — Sivajee Battina, May 05 '17 at 07:29
how to remove it from hierarchy and release(dealloc) it? when? — PK86, May 05 '17 at 07:31
when to dismiss? It will get dismiss on click of OK button, right? — PK86, May 05 '17 at 08:57

score 0 · Answer 1 · answered May 05 '17 at 08:16

0

You need to create alertView as :

static UIAlertView *alertView = nil;

if (!alertView){
   alertView = [[UIAlertView alloc] initWithTitle:@"Title" message:@"message" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
}

answered May 05 '17 at 08:16

KKRocks

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why should UIAlertView as static? – PK86 May 05 '17 at 08:58
because when you call this method then alertview create new instance so. – KKRocks May 05 '17 at 08:59
you can declared global alertiview instead of static . – KKRocks May 05 '17 at 09:00
why there is leak, I want to know ? And, how to remove it? – PK86 May 05 '17 at 09:02
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/143478/discussion-between-kkrocks-and-pk86). – KKRocks May 05 '17 at 09:26

iOS ARC UIAlertView leaking memory

1 Answers1