How to Locate the Cgrect For a Substring of Text in a Uilabel

How do I locate the CGRect for a substring of text in a UILabel?

Following Joshua's answer in code, I came up with the following which seems to work well:

- (CGRect)boundingRectForCharacterRange:(NSRange)range
{
    NSTextStorage *textStorage = [[NSTextStorage alloc] initWithAttributedString:[self attributedText]];
    NSLayoutManager *layoutManager = [[NSLayoutManager alloc] init];
    [textStorage addLayoutManager:layoutManager];
    NSTextContainer *textContainer = [[NSTextContainer alloc] initWithSize:[self bounds].size];
    textContainer.lineFragmentPadding = 0;
    [layoutManager addTextContainer:textContainer];

    NSRange glyphRange;

    // Convert the range for glyphs.
    [layoutManager characterRangeForGlyphRange:range actualGlyphRange:&glyphRange];

    return [layoutManager boundingRectForGlyphRange:glyphRange inTextContainer:textContainer];
}

UILabel get CGRect for substring of text

This was mostly needed for one character rects, so I went crazy and wrote some code that could accurately calculate the rect for the most basic UILabel. Standard UILineBreakMode and text alignment.

I was hoping that if I release it to the public people code contribute to it and improve it, especially since I don't know so much about text rendering!

The code:

https://gist.github.com/1278483

Find coordinates of a substring in UILabel

Might be you can calculate using-

CGSize stringSize = [string sizeWithFont:myFont 
                       constrainedToSize:maximumSize 
                           lineBreakMode:self.myLabel.lineBreakMode];

Now New position-

x = self.myLabel.frame.origin.x + stringSize.width

and for y similarly you need to have code with consideration of x.

UILabel centered text CGRect?

I ended up using UILabel.textRect. It works perfectly for me.

let myRect:CGRect = _topBanner.textRect(forBounds: _topBanner.bounds, limitedToNumberOfLines: 1)
_icon.frame.origin.x = myRect.origin.x - _icon.frame.size.width + 50
_icon.frame.origin.y = _topBanner.frame.origin.y + 8

Get frame of word in a substring in a multiline label

I solved it using this:

+ (CGRect)getFrameOfString:(NSString *)substring inLabel:(UILabel *)label {

    NSString *string = label.text;
    CGRect labelFrame = label.frame;

    NSRange substringRange = [string rangeOfString:substring];
    NSString *prefixString = [string substringToIndex:substringRange.location];

    NSStringDrawingContext *stringDrawingContext = [[NSStringDrawingContext alloc] init];

    stringDrawingContext.minimumScaleFactor = label.minimumScaleFactor;

    CGRect prefixFrame = [prefixString boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, labelFrame.size.height) options:NSStringDrawingUsesLineFragmentOrigin attributes:[Util getAttributesforFont:label.font] context:stringDrawingContext];
    CGRect substringFrame = [substring boundingRectWithSize:labelFrame.size options:NSStringDrawingUsesLineFragmentOrigin attributes:[Util getAttributesforFont:label.font] context:stringDrawingContext];

    prefixFrame = CGRectIntegral(prefixFrame);
    substringFrame = CGRectIntegral(substringFrame);

    NSInteger labelWidth = labelFrame.size.width;

    BOOL isOnNextLine = prefixFrame.size.width >= labelWidth;

    CGFloat left = prefixFrame.size.width - (isOnNextLine ? labelWidth : 0); // the substrings on the other lines are offset by the label frame's width
    CGFloat top = isOnNextLine ? substringFrame.size.height : 0; // the substrings on the other lines have the top position equal to it's height
    CGFloat width = substringFrame.size.width;
    CGFloat height = substringFrame.size.height;

    return CGRectMake(left, top, width, height);
}

which I think it now only works for labels with two lines.

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