TextView autoheight in a ScrollView - iphone

Question

I'm trying to insert a TextView inside a Scrollview. The scrollview work but the content of TextView not show complete, because appear their scroll. I would show complete content of TextView without scroll.
file.h
#interface DetailViewController : UIViewController{
IBOutlet UITextView *detailTextView;
IBOutlet UIScrollView *scroller;
}
#property(retain, nonatomic) IBOutlet UIScrollView *scroller;
-(void)setTextViewForRecipes: (Recipe *)theRecipe;
#end
file.m
#implementation DetailViewController
#synthesize scroller;
-(void) setTextViewForRecipe:(Recipe *)theRecipe
{
[detailTextView setText:theRecipe.detail];
}
- (void)viewDidLoad {
CGRect frame = detailTextView.frame;
frame.size.height = detailTextView.contentSize.height;
detailTextView.frame = frame;
[scroller setContentSize: CGSizeMake(280, detailTextView.frame.origin.y + detailTextView.frame.size.height + 10)];
}

Answer 1

You've got the right idea in viewDidLoad by setting detailTextView's frame height to its contentSize height. But you need do that after you set the text of the view, and of course you need to adjust the scroller's contentSize again.
-(void) setTextViewForRecipe:(Recipe *)theRecipe
{
detailTextView.text = theRecipe.detail;
CGRect frame = detailTextView.frame;
frame.size.height = detailTextView.contentSize.height;
detailTextView.frame = frame;
scroller.contentSize = CGSizeMake(280, 10 + CGRectGetMaxY(frame));
}

Answer 2

UITextView is a subclass of UIScrollView, so you shouldn't add it to a scroll view.

Answer 3

As bandejapaisa pointed out, it's usually not necessary to wrap a UITextView inside a UIScrollView, because the textView can scroll by itself.
If, however, you really find this necessary, you can find out the size of the text if it were rendered with a certain font:
CGSize textSize = [text sizeWithFont:[UIFont systemFontOfSize:fontSizeOfYourTextView]
constrainedToSize:CGSizeMake(widthOfYourTextView, MAXFLOAT)
lineBreakMode:UILineBreakModeOfYourTextView];
This will find out the height. Adapt to your needs, but be warned: This gets a little hackery, and you'll probably need to do some trial and error before you achieve the desired outcome.