IOS development-get the ios keyboard height

IOS development-get the ios keyboard height

-(Void) viewDidLoad {[super viewDidLoad]; // adds a listener to receive messages when the keyboard appears or changes

[[Nsicationcenter center defacenter center] addObserver: self

Selector: @ selector (keyboardDidShow :)

Name: UIKeyboardWillShowNotification

Object: nil];

// Adds a listener to receive messages when the key exits.

[[Nsicationcenter center defacenter center] addObserver: self

Selector: @ selector (keyboardDidHide :)

Name: UIKeyboardWillHideNotification

Object: nil];

}

// Called when the keyboard appears or changes

-(Void) keyboardDidShow :( NSNotification *) notification {

NSDictionary * userInfo = [notification userInfo];

CGSize keyboardSize = [[userInfo objectForKey: UIKeyboardFrameBeginUserInfoKey] CGRectValue]. size;

_ KeyBoardHeight = keyboardSize. height;

[Self changeViewYByShow];

}

 

// Called when the keyboard is hidden

-(Void) keyboardDidHide :( NSNotification *) notification {

_ KeyBoardHeight = 0;

[Self changeViewYByHide];

}

# Pragma mark-private methods

-(Void) changeViewYByShow {

[UIView animateWithDuration: 0.2 animations: ^ {

CGRect rect = self. view. frame;

Rect. origin. y-= self. keyBoardHeight;

Self. view. frame = rect;

}];

}

-(Void) changeViewYByHide {

CGRect rect = self. view. frame;

Rect. origin. y = 64;

Self. view. frame = rect;

}