Tengo una extensión para convertir una cadena HTML a NSAttributedString .

Después del lanzamiento de iOS 15, he visto muchos bloqueos de mi usuario. Todos esos bloqueos están en iOS 15 y ocurren en el hilo principal .

Este es un informe de bloqueo típico de Crashlytics.

 Crashed: com.apple.main-thread 0 libsystem_platform.dylib 0x1f29d60c0 _os_unfair_lock_recursive_abort + 36 1 libsystem_platform.dylib 0x1f29d0a10 _os_unfair_lock_lock_slow + 304 2 Foundation 0x183d5e730 -[NSProcessInfo(NSProcessInfoHardwareState) isLowPowerModeEnabled] + 68 3 WebCore 0x192011004 <redacted> + 56 4 CoreFoundation 0x182535ee8 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 28 5 CoreFoundation 0x1825d1b9c ___CFXRegistrationPost_block_invoke + 52 6 CoreFoundation 0x1825a4f54 _CFXRegistrationPost + 456 7 CoreFoundation 0x18254bd54 _CFXNotificationPost + 716 8 Foundation 0x183d50028 -[NSNotificationCenter postNotificationName:object:userInfo:] + 96 9 Foundation 0x183dc89d4 NSProcessInfoNotifyPowerState + 188 10 Foundation 0x183d5e768 -[NSProcessInfo(NSProcessInfoHardwareState) isLowPowerModeEnabled] + 124 11 WebCore 0x191595118 <redacted> + 96 12 WebCore 0x19201116c WebCore::LowPowerModeNotifier::LowPowerModeNotifier(WTF::Function<void (bool)>&&) + 52 13 WebCore 0x192f36c4c WebCore::Page::Page(WebCore::PageConfiguration&&) + 1848 14 WebKitLegacy 0x1a605ae34 -[WebView(WebPrivate) _commonInitializationWithFrameName:groupName:] + 3060 15 WebKitLegacy 0x1a605a214 -[WebView(WebPrivate) _initWithFrame:frameName:groupName:] + 116 16 UIFoundation 0x18d306028 -[NSHTMLReader _loadUsingWebKit] + 832 17 UIFoundation 0x18d30715c -[NSHTMLReader attributedString] + 32 18 UIFoundation 0x18d2c04e8 _NSReadAttributedStringFromURLOrData + 8420 19 UIFoundation 0x18d2be378 -[NSAttributedString(NSAttributedStringUIFoundationAdditions) initWithData:options:documentAttributes:error:] + 156 20 MyAppExtensions 0x108aa0fc4 _hidden#912_ + 4374482884 (__hidden#360_:4374482884) 21 MyAppExtensions 0x108aa0894 NSAttributedString.init(htmlString:font:useDocumentFontSize:) + 36 (__hidden#925_:36) 22 MyAppName 0x1045eca18 {foo_class}.convertHTML(_:) + 670 (xxxx.swift:670) 23 MyAppName 0x1045e5c58 {foo_class}.some_function_3 + 620 (xxxx.swift:620) 24 MyAppName 0x1045e4760 {foo_class}.some_function_2 + 212 (xxxx.swift:212) 25 MyAppName 0x1045e4200 {foo_class}.some_function_1 + 138 (xxxx.swift:138) . . . 42 UIKitCore 0x184b5e1d0 _UIGestureRecognizerSendTargetActions + 116 43 UIKitCore 0x184b2705c _UIGestureRecognizerSendActions + 284 44 UIKitCore 0x184b60580 -[UIGestureRecognizer _updateGestureForActiveEvents] + 636 45 UIKitCore 0x184b186fc _UIGestureEnvironmentUpdate + 1988 46 CoreFoundation 0x18254c570 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 36 47 CoreFoundation 0x18251b854 __CFRunLoopDoObservers + 572 48 CoreFoundation 0x1825168ec __CFRunLoopRun + 1052 49 CoreFoundation 0x18252a3c8 CFRunLoopRunSpecific + 600 50 GraphicsServices 0x19dd3b38c GSEventRunModal + 164 51 UIKitCore 0x184ed00bc -[UIApplication _run] + 1100 52 UIKitCore 0x184c4dbe8 UIApplicationMain + 2124 53 libswiftUIKit.dylib 0x199afe184 UIApplicationMain(_:_:_:_:) + 104 54 MyAppName 0x1043a5894 main + 7 (main.swift:7) 55 dyld 0x106b81a24 start

El siguiente es el código para convertir HTML a NSAttributedString :

 extension NSAttributedString { convenience public init(htmlString html: String, font: UIFont? = nil, useDocumentFontSize: Bool = true) throws { let options: [NSAttributedString.DocumentReadingOptionKey: Any] = [ .documentType: NSAttributedString.DocumentType.html, .characterEncoding: String.Encoding.utf8.rawValue ] guard let data = html.data(using: .utf8, allowLossyConversion: true) else { self.init(string: "") return } guard let fontFamily = font?.familyName else { try self.init(data: data, options: options, documentAttributes: nil) return } let attr = try NSMutableAttributedString(data: data, options: options, documentAttributes: nil) let fontSize: CGFloat? = useDocumentFontSize ? nil : font!.pointSize let range = NSRange(location: 0, length: attr.length) attr.enumerateAttribute(.font, in: range, options: .longestEffectiveRangeNotRequired) { attrib, range, _ in if let htmlFont = attrib as? UIFont { let traits = htmlFont.fontDescriptor.symbolicTraits var descrip = htmlFont.fontDescriptor.withFamily(fontFamily) if (traits.rawValue & UIFontDescriptor.SymbolicTraits.traitBold.rawValue) != 0 { descrip = descrip.withSymbolicTraits(.traitBold)! } if (traits.rawValue & UIFontDescriptor.SymbolicTraits.traitItalic.rawValue) != 0 { descrip = descrip.withSymbolicTraits(.traitItalic)! } attr.addAttribute(.font, value: UIFont(descriptor: descrip, size: fontSize ?? htmlFont.pointSize), range: range) } } self.init(attributedString: attr) }

Por cierto, estoy usando Xcode 12.5 para archivar la versión de lanzamiento.