Question

I can use the code below to set the size of the textView frame, to approximately match the textView’s content (the typed text) when I press a button or whatnot. How would I call this whenever a new character is typed, so that the frame would grow or shrink interactively?

- (IBAction)doneEditingText:(id)sender {
    [myTextView resignFirstResponder];
    [myTextView setFrame:CGRectMake(myTextView.frame.origin.x, myTextView.frame.origin.y, myTextView.contentSize.width, myTextView.contentSize.height)];
}

Thanks for reading

Answer 1

EDIT :

Implement UITextView delegate in .h file this:

@interface ViewController : UIViewController<UITextViewDelegate>

If yourTextView added from xib then bind delegate with fileowner otherwise in ViewDidLoad add this line:

yourTextView.delegate = self;

---

Use textView’s delegate for your requirement:

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
   CGSize maximumSize = CGSizeMake(280,999); //specify width of textView  and maximum height for text to fit in width of textView
   CGSize txtSize = [textView.text sizeWithFont:[UIFont fontWithName:@"Arial" size:16] constrainedToSize:maximumSize lineBreakMode:UILineBreakModeCharacterWrap]; //calulate size of text by specifying font here
   //Add UIViewAnimation here if needed
   [textView setFrame:CGRectMake(textView.frame.origin.x,textView.frame.origin.y,txtSize.width+10,txtSize.height+10)]; // change accordingly
   return YES;
}