UILabel Crash with Attributed Text

Pls. share any errors related to your crash, thanks.

___________

Tags:For Best Results - Read the Label

Did you copy the exact code ?

Surely not, because there are a lot of typos.

I tested this, it works

        let label = UILabel()
        label.attributedText = NSAttributedString(string: "String")
        label.sizeToFit()   //this will crash the App
        print(label)

So please, when you ask :

- copy the exact code, do not retype with errors

- tell what exact message you get

Also tested a property

        print(label.isEnabled)

No crash, I get true in log.

Here is a sample of the code that causes the crash.

It crashes at line 14 with an unrecognized selector sent to instance. Line 13 executes successfully.

If I don't set the attributedText then it works fine.

private func centeredAttributedString(_ string: String, fontSize: CGFloat) -> NSAttributedString {
    var font = UIFont.preferredFont(forTextStyle: .body).withSize(fontSize)
    font = UIFontMetrics(forTextStyle: .body).scaledFont(for: font) // allows user to change scale of font
    let paragraphStyle = NSMutableParagraphStyle()
    paragraphStyle.alignment = .center
    return NSAttributedString(string: string, attributes: [.paragraphStyle:paragraphStyle, .font:fontSize])
    
}

let label = UILabel()
label.frame.size = CGSize.zero
label.attributedText = centeredAttributedString("Attributed String", fontSize: 35.0)
print(label)
label.sizeToFit()
label.isHidden = false

The error is :

    return NSAttributedString(string: string, attributes: [.paragraphStyle:paragraphStyle, .font:fontSize])

font parameter is a font, not a fontSize.

Change with:

        return NSAttributedString(string: string, attributes: [.paragraphStyle:paragraphStyle, .font: font])

please check it!

`1 CoreText TFont::UserFallbacksForLanguage(__CFString const*) const (in CoreText) + 184 2 CoreText TFontCascade::InitParams() (in CoreText) + 476 3 CoreText TFontCascade::InitParams() (in CoreText) + 476 4 CoreText TFontCascade::CreateFallback(__CTFont const*, __CFString const*, CTEmojiPolicy) const (in CoreText) + 88 5 CoreText TGlyphEncoder::AppendUnmappedCharRun(unsigned int, TCFRef<CTRun*>&, __CTFont const*, CFRange&, CFRange, TInlineVector<long, 30ul>&, TFontCascade const&, TGlyphEncoder::ClusterMatching, bool) (in CoreText) + 720 6 CoreText TGlyphEncoder::RunUnicodeEncoderRecursively(unsigned int, TCFRef<CTRun*>&&, __CTFont const*, CFRange, TInlineVector<long, 30ul>&, TGlyphEncoder::Fallbacks, TFontCascade const*, __CFString const*, TGlyphEncoder::ClusterMatching, bool) (in CoreText) + 1424 7 CoreText TGlyphEncoder::EncodeChars(CFRange, TAttributes const&, TGlyphEncoder::Fallbacks) (in CoreText) + 1412 8 CoreText TTypesetterAttrString::Initialize(__CFAttributedString const*) (in CoreText) + 448 9 CoreText TTypesetterAttrString::TTypesetterAttrString(__CFAttributedString const*, __CFDictionary const*) (in CoreText) + 160 10 CoreText CTLineCreateWithAttributedString (in CoreText) + 132 11 UIFoundation -[NSCoreTypesetter _stringDrawingCoreTextEngineWithOriginalString:rect:padding:graphicsContext:forceClipping:attributes:stringDrawingOptions:drawingContext:stringDrawingInterface:] (in UIFoundation) + 1740 12 UIFoundation __NSStringDrawingEngine (in UIFoundation) + 1652 13 UIFoundation -[NSString(NSExtendedStringDrawing) boundingRectWithSize:options:attributes:context:] (in UIFoundation) + 156 14 UIKitCore -[UILabel _textRectForBounds:limitedToNumberOfLines:includingShadow:] (in UIKitCore) + 1220 15 UIKitCore -[UILabel _intrinsicSizeWithinSize:] (in UIKitCore) + 484 16 UIKitCore -[UIView(Geometry) sizeToFit] (in UIKitCore) + 136