UITextView wraps text when built with iOS 7 SDK

Question

I have a UITextView inside a UIScrollView that worked perfectly fine on iOS 6 built from xcode 4.x, however now building with xcode 5 it doesn't work properly, even on iOS 6.

The problem is the text wraps with the screen width even though the UITextView and UIScrollView have large widths. I use this code to work out the new width and height of the UITextView, and even though the textview scrolls left/right the text is wrapped as if the width is only the width of the screen.

Thanks

self.responceTextView.text = [NSString stringWithFormat:@"%@%@",_responceTextView.text,responce];
[self textViewDidChange:self.responceTextView];

- (void)textViewDidChange:(UITextView *)textView
{
    // Recalculate size of text field
    CGSize maxSize = CGSizeMake(MAXFLOAT, MAXFLOAT);
    CGSize reqSize = [textView.text sizeWithFont:[UIFont fontWithName:@"Courier" size:12] constrainedToSize:maxSize lineBreakMode:NSLineBreakByClipping];

    self.responceTextView.frame = CGRectMake(0, 0, reqSize.width+16, reqSize.height+16);

    // Resize scroll view if needs to be smaller so text stays at top of screen
    CGFloat maxScrollHeight = maxScrollViewSize.size.height;
    if (self.responceTextView.frame.size.height < maxScrollHeight) {
        self.responceScrollView.frame = CGRectMake(self.responceScrollView.frame.origin.x, self.responceScrollView.frame.origin.y, self.responceScrollView.frame.size.width, self.responceTextView.frame.size.height);
    } else {
        self.responceScrollView.frame = maxScrollViewSize;
    }

    // Set content size
    self.responceScrollView.contentSize = CGSizeMake(self.responceTextView.frame.size.width, self.responceTextView.frame.size.height);

    [self scrollToCursor];
}

EDIT ----

Ok, so it seems sizeWithFont is deprecated in iOS 7. Strange how I get no compiler warning. It still doesn't make sense that it doesn't work on iOS 6 (or is it completely removed when built with iOS 7 SDK?)

I have tried these 2 alternatives, but get exactly the same size back from all.

NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:
                                [UIFont fontWithName:@"Courier" size:12], NSFontAttributeName,
                                nil];
CGRect rect = [textView.text boundingRectWithSize:maxSize options:NSLineBreakByClipping | NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:attributes context:nil];

returns: {{0, 0}, {439.27148, 168}}

CGSize rect2 = [textView.text sizeWithAttributes:attributes];

returns: {439.27148, 168}

And the original above returns {439.27148, 168}

They should all return a wider view.

EDIT 2 ---- It seems from above that the returned frame is correct (439 wide) however it's the text that is still being word wrapped inside the textview.

Answer 1

try using:

[textView.text boundingRectWithSize:CGSizeMake(txtFrame.size.width, CGFLOAT_MAX)
                           options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
                           attributes:[NSDictionary dictionaryWithObjectsAndKeys:textView.font,NSFontAttributeName, nil] context:nil];

The string measuring seems pretty buggy. This is the only option combination that gives the right size, for the testing I have done.

I'm using the following code with success in iOS7 (it's a UITextField with a minimum and maximum height. When the text's height get larger then MAX_HEIGHT_MESSAGE_TEXTBOX, scrollbars appears in the UITextField).

const float MAX_HEIGHT_MESSAGE_TEXTBOX = 80;
const float MIN_HEIGHT_MESSAGE_TEXTBOX = 30;


- (void)setFrameToTextSize:(CGRect)txtFrame textView:(UITextView *)textView
{

    if(txtFrame.size.height > MAX_HEIGHT_MESSAGE_TEXTBOX)
    {
        //OK, the new frame is to large. Let's use scroll
        txtFrame.size.height = MAX_HEIGHT_MESSAGE_TEXTBOX;
        textView.scrollEnabled = YES;
        [textView scrollRangeToVisible:NSMakeRange([textView.text length], 0)];
    }
    else
    {
        if (textView.frame.size.height < MIN_HEIGHT_MESSAGE_TEXTBOX) {
             //OK, the new frame is to small. Let's set minimum size
            txtFrame.size.height = MIN_HEIGHT_MESSAGE_TEXTBOX;
        }
        //no need for scroll
        textView.scrollEnabled = NO;
    }
    //set the frame
    textView.frame = txtFrame;
}

- (void)setframeToTextSize:(UITextView *)textView animated:(BOOL)animated
{
    //get current height
    CGRect txtFrame = textView.frame;

    //calculate height needed with selected font. Note the options.
    //append a new line to make space for the cursor after user hit the return key
    txtFrame.size.height =[[NSString stringWithFormat:@"%@\n ",textView.text]
                           boundingRectWithSize:CGSizeMake(txtFrame.size.width, CGFLOAT_MAX)
                           options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
                           attributes:[NSDictionary dictionaryWithObjectsAndKeys:textView.font,NSFontAttributeName, nil] context:nil].size.height;

    if (animated) {
        //set the new frame, animated for a more nice transition
        [UIView animateWithDuration:0.2 delay:0.0 options:UIViewAnimationOptionCurveEaseOut |UIViewAnimationOptionAllowAnimatedContent animations:^{
            [self setFrameToTextSize:txtFrame textView:textView];
        } completion:nil];
    }
    else
    {
        [self setFrameToTextSize:txtFrame textView:textView];
    }
}

- (void)textViewDidChange:(UITextView *)textView
{
    [self setframeToTextSize:textView animated:YES];
}

EDIT

When the string measuring is correct, you might need to change the lineBreakModeon the UITextView's textContainer. (NSTextContainer is a new class in iOS7, containing information about how text should be laid out):

textView.textContainer.lineBreakMode = NSLineBreakByCharWrapping; // default is NSLineBreakByWordWrapping 

Good luck!

Answer 2

method sizeWithFont:(UIFont *)font constrainedToSize ..." has been deprecated in iOS 7.

It would function properly.

Check out its alternate in iOS 7

Instance Method of NSString

-(CGRect)boundingRectWithSize:(CGSize)size options:(NSStringDrawingOptions)options attributes:

(NSDictionary *)attributes context:(NSStringDrawingContext *)context

Check this answer out. Replacement for deprecated sizeWithFont: in iOS 7?