Open Radar

 
Summary:

In an attributed string, paragraphSpacing is incorrectly added after a Unicode line separator (\u2028).

Steps to Reproduce:

(1) Create a string containing a Unicode line separator (and, for comparison, a paragraph separator).
(2) Create attributes with line height multiple and paragraph spacing.
(3) Create attributed string with string and attributes.
(4) Assign attributed string to label text.

    static NSString *const kUnicodeLineSeparator = @"\u2028";
    static NSString *const kUnicodeParagraphSeparator = @"\u2029";
    NSString *string = [NSString stringWithFormat:@"line1%@line2%@paragraph2", kUnicodeLineSeparator, kUnicodeParagraphSeparator];
    NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
    style.lineHeightMultiple = 0.75;
    style.paragraphSpacing = 5;
    NSDictionary *attributes = @{
        NSParagraphStyleAttributeName: style
    };
    NSAttributedString *attributedString = [[NSAttributedString alloc] initWithString:string attributes:attributes];
    self.label.text = attributedString;

Expected Results:

Line 1 and line 2 are separated by 75% of the standard line spacing for the font.  Paragraph 2 is separated from line 2 by 5 additional points.

Actual Results:

Line 1 and line 2 are separated by 75% of the standard line spacing for the font plus 5 points.  Paragraph 2 is separated from line 2 by the same.

Regression:

Notes:

iOS 6 does this correctly.