How to re-size UITextView when keyboard shown with iOS 7

Question

I have a view controller which contains a full-screen UITextView. When the keyboard is shown I would like to resize the text view so that it is not hidden under

Answer 1

I read the docs which talk about this very topic. I translated it into Swift and it worked absolutely beautifully for me.

This is used for a full page UITextView like iMessage.

I am using iOS 8.2 and Swift on XCode 6.2 and here's my code. Just call this setupKeyboardNotifications from your viewDidLoad or other initialization method.

func setupKeyboardNotifications() {
    NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWasShown:"), name: UIKeyboardDidShowNotification, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillBeHidden:"), name: UIKeyboardWillHideNotification, object: nil)
}

func keyboardWasShown(aNotification:NSNotification) {
    let info = aNotification.userInfo
    let infoNSValue = info![UIKeyboardFrameBeginUserInfoKey] as NSValue
    let kbSize = infoNSValue.CGRectValue().size
    let contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0)
    codeTextView.contentInset = contentInsets
    codeTextView.scrollIndicatorInsets = contentInsets
}

func keyboardWillBeHidden(aNotification:NSNotification) {
    let contentInsets = UIEdgeInsetsZero
    codeTextView.contentInset = contentInsets
    codeTextView.scrollIndicatorInsets = contentInsets
}

Also if you are having issues with the caret being in the right place when rotated check for the orientation change and scroll to the right position.

override func didRotateFromInterfaceOrientation(fromInterfaceOrientation: UIInterfaceOrientation) {
    scrollToCaretInTextView(codeTextView, animated: true)
}

func scrollToCaretInTextView(textView:UITextView, animated:Bool) {
    var rect = textView.caretRectForPosition(textView.selectedTextRange?.end)
    rect.size.height += textView.textContainerInset.bottom
    textView.scrollRectToVisible(rect, animated: animated)
}

Swift 3:

func configureKeyboardNotifications() {
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWasShown(aNotification:)), name: NSNotification.Name.UIKeyboardDidShow, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillBeHidden(aNotification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}

func keyboardWasShown(aNotification:NSNotification) {
    let info = aNotification.userInfo
    let infoNSValue = info![UIKeyboardFrameBeginUserInfoKey] as! NSValue
    let kbSize = infoNSValue.cgRectValue.size
    let contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0)
    textView.contentInset = contentInsets
    textView.scrollIndicatorInsets = contentInsets
}

func keyboardWillBeHidden(aNotification:NSNotification) {
    let contentInsets = UIEdgeInsets.zero
    textView.contentInset = contentInsets
    textView.scrollIndicatorInsets = contentInsets
}

Swift 4 & 5:

func setupKeyboardNotifications() {
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(_ :)), name: UIResponder.keyboardWillShowNotification, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(_:)), name: UIResponder.keyboardWillHideNotification, object: nil)
}



@objc func keyboardWillShow(_ notification:NSNotification) {
    let d = notification.userInfo!
    var r = (d[UIResponder.keyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
    r = self.textView.convert(r, from:nil)
    self.textView.contentInset.bottom = r.size.height
    self.textView.verticalScrollIndicatorInsets.bottom = r.size.height

}

@objc func keyboardWillHide(_ notification:NSNotification) {
    let contentInsets = UIEdgeInsets.zero
    self.textView.contentInset = contentInsets
    self.textView.verticalScrollIndicatorInsets = contentInsets
}

Answer 2

Following on is working for me :

.h file

@interface ViewController : UIViewController <UITextViewDelegate> {

    UITextView *textView ;

}

@property(nonatomic,strong)IBOutlet UITextView *textView;

@end

.m file

@implementation ViewController
@synthesize textView;
- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    CGRect textViewFrame = CGRectMake(20.0f, 20.0f, 280.0f, 424.0f);
    //UITextView *textView = [[UITextView alloc] initWithFrame:textViewFrame];
    textView.frame = textViewFrame;
    textView.delegate = self;
    textView.returnKeyType = UIReturnKeyDone;
    textView.backgroundColor = [UIColor greenColor];
    textView.textColor = [UIColor blackColor];
    [self.view addSubview:textView];

}
- (BOOL)textViewShouldBeginEditing:(UITextView *)textView{
    NSLog(@"textViewShouldBeginEditing:");
    return YES;
}
- (void)textViewDidBeginEditing:(UITextView *)textView1 {
    NSLog(@"textViewDidBeginEditing:");
   CGRect textViewFrame = CGRectMake(20.0f, 20.0f, 280.0f, 224.0f);

    textView1.frame = textViewFrame;

}
- (BOOL)textViewShouldEndEditing:(UITextView *)textView{
    NSLog(@"textViewShouldEndEditing:");
       return YES;
}
- (void)textViewDidEndEditing:(UITextView *)textView{
    NSLog(@"textViewDidEndEditing:");
}
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{
       return YES;
}

- (void)textViewDidChange:(UITextView *)textView{
    NSLog(@"textViewDidChange:");
}

- (void)textViewDidChangeSelection:(UITextView *)textView{
    NSLog(@"textViewDidChangeSelection:");
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    NSLog(@"touchesBegan:withEvent:");
    CGRect textViewFrame = CGRectMake(20.0f, 20.0f, 280.0f, 424.0f);

    textView.frame = textViewFrame;
    [self.view endEditing:YES];
    [super touchesBegan:touches withEvent:event];
}
@end