CODEWITHSUNDEEP
iphoneobjective-cxcode
sinoptic
sinoptic

Reputation: 303

Keyboard notifications and presentModalViewController

I get twice notification on keyboard down and once on keyboard up…

In my class I put notifications for keyboard:

-(id)init… {
…
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
…
}

to do frame adjustment on keyboard slide.

Later during the class work I use 'ABPeoplePickerNavigationController' to select address. 

…
ABPeoplePickerNavigationController *userPicker=[[ABPeoplePickerNavigationController alloc] init];
…
[viewController presentModalViewController:userPicker animated:YES];
…

I’ve found that on ‘presentModalViewController’ I get twice ‘UIKeyboardWillHideNotification’ , BUT once ‘UIKeyboardWillShowNotification’ – when the picker goes out.

Pretty strange.

I tried to remove observer for ‘UIKeyboardWillHideNotification’ from the class initialization (to find any double observer declarations). However, after this remove no ‘UIKeyboardWillHideNotification’ notifications at all.

Why I get different amount of notifications on keyboard up and down?

May be I do something wrong?

Thanks.

Upvotes: 1

Views: 2036

Answers (1)

grandouassou
grandouassou

Reputation: 2530

It is quite common (especially with the *WillDoSomething message) to receive a notification twice though you expected just once. What you could do to fix the problem is to have a boolean somewhere which stores the state of the UI. For instance, if keyboardUp is false would mean that you already move the UI to the default state.

Upvotes: 1

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