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    <p>UIKit posts <code>UIKeyboardWillShowNotification</code> when it shows the keyboard, and <code>UIKeyboardWillHideNotification</code> when it hides the keyboard. These notifications contain everything you need to properly animate your <code>UITextField</code>.</p> <p>Let's say your <code>UITextField</code> is in a property called called <code>myTextField</code>.</p> <p>First, you need to register for the notifications somewhere. Where you register depends on what object is responsible for moving <code>myTextField</code>. In my project, the field's superview is responsible, and since I load my UI from a nib, I do it in the superview's <code>awakeFromNib</code>:</p> <pre><code>- (void)awakeFromNib { [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHideOrShow:) name:UIKeyboardWillHideNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHideOrShow:) name:UIKeyboardWillShowNotification object:nil]; } </code></pre> <p>If you use a <code>UIViewController</code> to move the field around, you'll probably want to do it in <code>viewWillAppear:animated:</code>.</p> <p>You should unregister in your <code>dealloc</code> or <code>viewWillDisappear:animated:</code>:</p> <pre><code>- (void)dealloc { [[NSNotificationCenter defaultCenter] removeObserver:self]; } </code></pre> <p>Of course the tricky bit is in the <code>keyboardWillHideOrShow:</code> method. First I extract the animation parameters from the notification:</p> <pre><code>- (void)keyboardWillHideOrShow:(NSNotification *)note { NSDictionary *userInfo = note.userInfo; NSTimeInterval duration = [[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]; UIViewAnimationCurve curve = [[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] intValue]; CGRect keyboardFrame = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue]; </code></pre> <p>The <code>keyboardFrame</code> is in the global coordinate system. I need to convert the frame to the same coordinate system as <code>myTextField.frame</code>, and <code>myTextField.frame</code> is in the coordinate system of <code>myTextField.superview</code>:</p> <pre><code> CGRect keyboardFrameForTextField = [self.myTextField.superview convertRect:keyboardFrame fromView:nil]; </code></pre> <p>Next, I compute the frame that I want <code>myTextField</code> to move to. The bottom edge of the new frame should be equal to the top edge of the keyboard's frame:</p> <pre><code> CGRect newTextFieldFrame = self.myTextField.frame; newTextFieldFrame.origin.y = keyboardFrameForTextField.origin.y - newTextFieldFrame.size.height; </code></pre> <p>Finally, I animate <code>myTextField</code> to its new frame, using the same animation parameters that the keyboard is using:</p> <pre><code> [UIView animateWithDuration:duration delay:0 options:UIViewAnimationOptionBeginFromCurrentState | curve animations:^{ self.myTextField.frame = newTextFieldFrame; } completion:nil]; } </code></pre> <p>Here it is all put together:</p> <pre><code>- (void)keyboardWillHideOrShow:(NSNotification *)note { NSDictionary *userInfo = note.userInfo; NSTimeInterval duration = [[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]; UIViewAnimationCurve curve = [[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] intValue]; CGRect keyboardFrame = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue]; CGRect keyboardFrameForTextField = [self.myTextField.superview convertRect:keyboardFrame fromView:nil]; CGRect newTextFieldFrame = self.myTextField.frame; newTextFieldFrame.origin.y = keyboardFrameForTextField.origin.y - newTextFieldFrame.size.height; [UIView animateWithDuration:duration delay:0 options:UIViewAnimationOptionBeginFromCurrentState | curve animations:^{ self.myTextField.frame = newTextFieldFrame; } completion:nil]; } </code></pre>
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    1. COThank you. Thank you. Thank you. Thank you. With a little modification, I have it working and it's looking super slick.
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    2. CO@rob mayoff the problem is when I've a `UITabBar`. When the keyboard will hide the `UITextField` slides down under the `UITabBar`. Why?
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    3. COIf you have a tab bar, then when the keyboard is hiding you need to compute `newTextFieldFrame` based on the frame of the tab bar instead of the frame of the keyboard.
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