Question

I have a UIAlert that pops up 3 times every time it is called. It appears and then disappears before I can click on it. Could it be that the viewDidLoad itself is being called 3 times?

I implemented an UIAlert in the viewDidLoad of my app:

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:alertMessage  delegate:self cancelButtonTitle:ok otherButtonTitles:nil];

This is the viewDidLoad in the rootViewController, that manages the views:

- (void)viewDidLoad {
    Kundenkarte *kartenAnsicht = [[Kundenkarte alloc]
                                                initWithNibName:@"Kundenkarte" bundle:nil];
    kartenAnsicht.rootViewController = self;
    kartenAnsicht.viewDidLoad;
    self.map = kartenAnsicht;


    [self.view addSubview:kartenAnsicht.view];


    [kartenAnsicht release];
//  [super viewDidLoad];

}

The viewDidLoad that evokes the UIAlert is in the kartenAnsicht view controller.

I hope someone can help me because I’m out of ideas.

Answer 1

First of all, you should never put any type of display in viewDidLoad. That method is intended for behind the scenes configuration after the view is first read from nib. There is no certainty that it will be called every time the view displays because after the first time it loads, the view maybe held in memory and not reloaded from nib.

Instead, put the call to evoke the NSAlert in viewWillDisplay or viewDidDisplay. This will display the alert each time the view appears.

I doubt that viewDidLoad is called three times but to check for that just put an NSLog in the method to see how many times it is called.

When you say that:

i implemented an NSAlert in the
viewDidLoad() of my app:

… what does that mean? What object exactly has the method? If it is the application delegate, this will not work because the application delegate protocol does not respond to viewDidLoad. It has to be in a UIViewController.

Edit01:

See this post that had the same problem: UIAlertView Pops Up Three Times per Call Instead of Just Once

Short answer: You kill the alert by releasing it. Either retain it as a property of the view controller or better yet, display the alert with runModal instead of show and capture the button number returned immediately.