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ioskeyboardtextviewuitextview
Kann
Kann

Reputation: 385

iOS keyboard obstructing the editing text in textview

I am implementing a textView in my viewController. This textView covers the entire screen since I plan to make this view for users to write down their notes. However, there seems to be a problem when user touches the textview and the keyboard pops up.

The thing is that, once touches the textview, the keyboard shows up half of the screen, and the beginning of the editing text gets hidden behind the keyboard. I tried typing something and didn't see the text at all since the editing text is behind the keyboard. Is there a way to fix this problem?

Upvotes: 3

Views: 1868

Answers (2)

Daniel Martín
Daniel Martín

Reputation: 7845

You have to resize the text view when the keyboard pops up. First of all, define a new method that register your controller for keyboard show and hide notifications:

- (void)registerForKeyboardNotifications
{
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWasShown:)
                                                 name:UIKeyboardDidShowNotification object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillBeHidden:)
                                                 name:UIKeyboardWillHideNotification object:nil];
}

Then call [self registerForKeyBoardNotifications]; from your viewDidLoad: method.

After that, you have to implement the callback methods:

Here's keyboardWasShown:, where you get the keyboard's height and subtract that amount to your textView's frame height (as you said, your text view fills up the entire screen so the final height is the previous height minus the keyboard height):

- (void)keyboardWasShown:(NSNotification*)aNotification
{
    NSDictionary* info = [aNotification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
    CGRect rect = self.textView.frame;
    rect.size.height -= kbSize.height;
}

And here's keyboardWillBeHidden:

- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
    CGRect rect = self.textView.frame;
    rect.size.height = SCREEN_HEIGHT;
}

Upvotes: 0

Talha
Talha

Reputation: 809

Write the delegate methods for UITextView in you implementation file and also set delegate of yout UITextView to self

- (BOOL)textViewShouldBeginEditing:(UITextView *)textView
{
    CGRect rect = txtMessage.frame;
    rect.size.height = 91;// you can set y position according to your convinience
    txtMessage.frame = rect;
    NSLog(@"texView frame is %@",NSStringFromCGRect(textView.frame));

    return YES;
}
- (BOOL)textViewShouldEndEditing:(UITextView *)textView{
    return YES;
}


- (void)textViewDidEndEditing:(UITextView *)textView{

    CGRect rect = txtMessage.frame;
    rect.size.height = 276; // set back orignal positions
    txtMessage.frame = rect;
   NSLog(@"EndTextView frame is %@",NSStringFromCGRect(textView.frame));

}

Upvotes: 2

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