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brcosm/UIKeyboardNotification Resizing

Last active April 5, 2016 21:45
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How to deal with keyboard resizing in a UIViewController
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UIKeyboardNotification Resizing
- (void)observeKeyboardNotifications
{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}
- (void)stopObservingKeyboardNotifications
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (void)keyboardWillShow:(NSNotification *)n
{
CGRect frame = self.view.frame;
CGRect keyboardFrame = [n.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
UIDeviceOrientation o = [[UIDevice currentDevice] orientation];
if (UIDeviceOrientationIsLandscape(o)) {
frame.size.width -= keyboardFrame.size.width;
} else {
frame.size.height -= keyboardFrame.size.height;
}
[UIView animateWithDuration:[n.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue] animations:^{
self.view.frame = frame;
}];
}
- (void)keyboardWillHide:(NSNotification *)n
{
CGRect frame = self.view.frame;
CGRect keyboardFrame = [n.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
UIDeviceOrientation o = [[UIDevice currentDevice] orientation];
if (UIDeviceOrientationIsLandscape(o)) {
frame.size.width += keyboardFrame.size.width;
} else {
frame.size.height += keyboardFrame.size.height;
}
[UIView animateWithDuration:[n.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue] animations:^{
self.view.frame = frame;
}];
}
@acegreen
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acegreen commented Apr 5, 2016

from iOS8 onwards, orientation check is no longer necessary. if you view was presented form sheet, how would your calculation be?

if (UIDeviceOrientationIsLandscape(o)) {
        frame.size.width += keyboardFrame.size.width;
} else {
        frame.size.height += keyboardFrame.size.height;
}

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