Dynamic expand UITextView on ios 7

Question

I am using this code

CGRect frame = self.mytext.frame;
frame.size.height = self.mytext.contentSize.height;
self.mytext.frame = frame;

But i

Answer 1

Get the new size of the textView using this method

CGSize sz = [_textView.text sizeWithFont:_textView.font]

in case that didn't work very well with the height,get the width you just got from the preivous method and use in the next method to get the appropriate height you need

- (CGFloat)textViewHeightForAttributedText:(NSAttributedString *)text andWidth:(CGFloat)width
{
    UITextView *textView = [[UITextView alloc] init];

    [textView performSelectorOnMainThread:@selector(setAttributedText:)
                                    withObject:text
                                 waitUntilDone:YES];

    CGSize size = [textView sizeThatFits:CGSizeMake(width, FLT_MAX)];
    return size.height;
}

Note : if there was any animation in the view,all the changes made in the view.frame will be discarded as the view will be redrawn again. So it would be better to deal with the constraints than dealing with the frame itself as the changes you will make in the constraint will be permanent even if the view got refreshed.

create IBoutlet of a constraint and connect it to your class like that

@property (weak, nonatomic) IBOutlet NSLayoutConstraint *your_constraint;

change the value of the contraint just like the way you change the view.frame parameters like that

            _constraintHeaderTitle.constant = THE_NEW_VALUE;