UITextView cursor below frame when changing frame

Question

I have a UIViewCOntrollerthat contains a UITextView. When the keyboard appears I resize it like this:

#pragma mark - Responding to          


        

Answer 1

For those that have a UITextView inside a UIScrollView where iOS < 7 took care of scrolling the caret into view: Here's how it works with iOS 7 (and also 5 & 6).

// This is the scroll view reference
@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;

// Track the current UITextView
@property (weak, nonatomic) UITextView *activeField;

- (void)textViewDidBeginEditing:(UITextView *)textView
{
    self.activeField = textView;
}

- (void)textViewdDidEndEditing:(UITextView *)textView
{
    self.activeField = nil;
}

// Setup the keyboard observers that take care of the insets & initial scrolling
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWasShown:)
                                             name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWillBeHidden:)
                                             name:UIKeyboardWillHideNotification object:nil];

- (void)keyboardWasShown:(NSNotification*)aNotification
{
    // Set the insets above the keyboard
    NSDictionary* info = [aNotification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    UIEdgeInsets insets = self.vForm.contentInset;
    insets.bottom += kbSize.height;
    self.vForm.contentInset = insets;

    insets = self.vForm.scrollIndicatorInsets;
    insets.bottom += kbSize.height;
    self.vForm.scrollIndicatorInsets = insets;

    // Scroll the active text field into view
    CGRect aRect = self.vForm.frame;
    aRect.size.height -= kbSize.height;
    CGPoint scrollPoint = CGPointMake(0.0, self.activeField.frame.origin.y);
    [self.scrollView setContentOffset:scrollPoint animated:YES];
}

- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
    UIEdgeInsets contentInsets = UIEdgeInsetsZero;
    self.vForm.contentInset = contentInsets;
    self.vForm.scrollIndicatorInsets = contentInsets;
}

// This is where the magic happens. Set the class with this method as the UITextView's delegate.
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
    // Scroll the textview to the caret position
    [textView scrollRangeToVisible:textView.selectedRange];

    // Scroll the scrollview to the caret position within the textview
    CGRect targetRect = [textView caretRectForPosition:textView.selectedTextRange.end];
    targetRect.origin.y += self.activeField.frame.origin.y;
    [self.scrollView scrollRectToVisible:targetRect animated:YES];

    return YES;
}

I tried to include most of the required glue code. The only things missing are setting the UITextView's delegate and dismissing the keyboard.

Took 2-3 days to figure out what previously worked. Thanks, Apple.