iOS: Resizing UITextView / UILabel

I implemented it with UILabel

1) First I set a max number of lines (Programatically by setting "numberOfLines" or in IB setting the "Lines" attribute)
2) Create a "READ MORE" button and set "readMoreClicked" as its action when touched up inside
3)

long numberOfLines = [self _numberOfLinesInNotes];

            

            if (numberOfLines <= <max_lines_you_want> ) {

                self. textLabel.numberOfLines = numberOfLines;

                self.readMoreButton.hidden = YES;

                

            } else {

                self.textLabel.numberOfLines = <max_lines_you_want>;

                self.readMoreButton.hidden = NO;

            }

4) 

#pragma mark - IBActions

- (IBAction)readMoreClicked:(id)sender

{

    if ([self.readMoreButton.titleLabel.text isEqualToString:@"READ MORE"]) {

        [self.readMoreButton setTitle:@"READ LESS" forState:UIControlStateNormal];

        self.noteLabel.numberOfLines = 0;

        

    } else {

        [self.readMoreButton setTitle:@"READ MORE" forState:UIControlStateNormal];

        self.noteLabel.numberOfLines = <max_lines_you_want>;

    }

}