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POUIScrollView Content Insets not working for Keyboard Height
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copied!<p>I am trying to move a <code>UIScrollView</code> when the keyboard hides a <code>UITextField</code> by changing the size using the <code>contentInsets</code> as it is shown. </p> <p>However, it's not working for the keyboard height. The keyboard height comes as 216, but it only stops scrolling at the correct location if I set the bottom inset to 515 for iPhone portrait mode and 310 for iPhone landscape mode. Why would these dimensions be so different? I don't want to hardcode these arbitrary values in.</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; self.view.frame = self.parentViewController.view.frame; [self.textView becomeFirstResponder]; NSLog(@"scrollview: %f,%f, parent: %f,%f", self.view.frame.size.height, self.view.frame.size.width, self.parentViewController.view.frame.size.height, self.parentViewController.view.frame.size.width); [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShown:) name:UIKeyboardDidShowNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil]; } - (void)keyboardWasShown:(NSNotification *)notification { if([[UIDevice currentDevice]userInterfaceIdiom]==UIUserInterfaceIdiomPhone) { // Step 1: Get the size of the keyboard. CGFloat keyboardHeight = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size.height; // Step 2: Adjust the bottom content inset of your scroll view by the keyboard height. UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, keyboardHeight, 0.0); ((UIScrollView*)self.view).contentInset = contentInsets; ((UIScrollView*)self.view).scrollIndicatorInsets = contentInsets; // Step 3: Scroll the target text field into view. CGRect aRect = self.view.frame; aRect.size.height = aRect.size.height - keyboardHeight; if (!CGRectContainsPoint(aRect, self.textView.frame.origin) ) { CGPoint scrollPoint = CGPointMake(0.0, self.textView.frame.origin.y - keyboardHeight); [((UIScrollView*)self.view) setContentOffset:scrollPoint animated:YES]; } } } - (void) keyboardWillHide:(NSNotification *)notification { UIEdgeInsets contentInsets = UIEdgeInsetsZero; ((UIScrollView*)self.view).contentInset = contentInsets; ((UIScrollView*)self.view).scrollIndicatorInsets = contentInsets; } </code></pre> <p>Edit: </p> <p>Before the keyboard is open, i print this out:</p> <pre><code>NSLog(@"scrollview: %f,%f, parent: %f,%f", self.view.frame.size.height, self.view.frame.size.width, self.parentViewController.view.frame.size.height, self.parentViewController.view.frame.size.width); </code></pre> <p>and it prints this:</p> <pre><code>scrollview: 431.000000,320.000000, parent: 431.000000,320.000000 </code></pre>

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