1. NSAttributedString
   1. NSMutableAttributedString
      1. NSTextStorage
2. NSDataAsset
3. NSExtensionContext
4. NSFileProviderExtension
5. NSItemProvider
6. NSItemProvider
   1. NSLayoutDimension
   2. NSLayoutXAxisAnchor
   3. NSLayoutYAxisAnchor
7. NSLayoutConstraint
8. NSLayoutManager
9. NSParagraphStyle
   1. NSMutableParagraphStyle
10. NSShadow
11. NSStringDrawingContext
12. NSTextAttachment
13. NSTextContainer
14. NSTextTab
15. Operation
    1. UIActivityItemProvider
16. UIAccessibilityCustomAction
17. UIAccessibilityCustomRotor
18. UIAccessibilityCustomRotorItemResult
19. UIAccessibilityCustomRotorSearchPredicate
20. UIAccessibilityElement
21. UIAccessibilityLocationDescriptor
22. UIActivity
23. UIAlertAction
24. UIApplicationShortcutIcon
25. UIApplicationShortcutItem
    1. UIMutableApplicationShortcutItem
26. UIBarButtonItemGroup
27. UIBarItem
    1. UIBarButtonItem
    2. UITapBarItem
28. UIBezierPath
29. UICollectionViewLayout
    1. UICollectionViewFlowLayout
    2. UICollectionViewTransitionLayout
30. UICollectionViewLayoutAttributes
31. UICollectionViewLayoutInvalidationContext
    1. UICollectionViewFlowLayoutInvalidationContext
32. UICollectionViewPlaceholder
    1. UICollectionViewDropPlaceholder
33. UICollectionViewUpdateItem
34. UIColor
35. UIContextualAction
36. UIDevice
37. UIDictationPhrase
38. UIDocument
    1. UIManagedDocument
39. UIDocumentInteractionController
40. UIDragInteraction
41. UIDragItem
42. UIDragPreview
43. UIDragPreviewParameters
44. UIDragPreviewTarget
45. UIDropInteraction
46. UIDropProposal
    1. UICollectionViewDropProposal
    2. UITableViewDropProposal
    3. UITextDropProposal
47. UIEvent
    1. UIPressesEvent
48. UIFeedbackGenerator
    1. UIImpactFeedbackGenerator
    2. UINotificationFeedbackGenerator
    3. UISelectionFeedbackGenerator
49. UIFocusAnimationCoordinator
50. UIFocusDebugger
51. UIFocusMovementHint
52. UIFocusSystem
53. UIFocusUpdateContext
    1. UICollectionViewFocusUpdateContext
    2. UITableViewFocusUpdateContext
54. UIFont
55. UIFontDescriptor
56. UIFontMetrics
57. UIGestureRecognizer
    1. UILongPressGestureRecognizer
    2. UIPanGestureRecognizer
       1. UIScreenEdgePanGestureRecognizer
    3. UIPinchGestureRecognizer
    4. UIRotationGestureRecognizer
    5. UISwipeGestureRecognizer
    6. UITapGestureRecognizer
58. UIGraphicsRenderer
    1. UIGraphicsImageRenderer
    2. UIGraphicsPDFRenderer
59. UIGraphicsRendererContext
    1. UIGraphicsImageRendererContext
    2. UIGraphicsPDFRendererContext
60. UIGraphicsRendererFormat
    1. UIGraphicsImageRendererFormat
    2. UIGraphicsPDFRendererFormat
61. UIImage
62. UIImageAsset
63. UIKeyCommand
64. UILayoutGuide
    1. UIFocusGuide
65. UILexicon
66. UILexiconEntry
67. UILocalizedIndexedCollation
68. UILocalNotification
69. UIMenuController
70. UIMenuItem
71. UINavigationItem
72. UINib
73. UIPasteBoard
74. UIPasteConfiguration
75. UIPencilInteraction
76. UIPopoverController
77. UIPresentationController
    1. UIPopoverPresentationController
78. UIPress
79. UIPreviewAction
80. UIPreviewActionGroup
81. UIPreviewInteraction
82. UIPrinter
83. UIPrinterPickerController
84. UIPrintFormatter
    1. UIMarkupTextPrintFormatter
    2. UISimpleTextPrintFormatter
    3. UIViewPrintFormatter
85. UIPrintInfo
86. UIPrintInteractionController
87. UIPrintPageRenderer
88. UIPrintPaper
89. UIResponder
    1. UIApplication
    2. UIView
       1. UIActionSheet
       2. UIActivityIndicatorView
       3. UIAlertView
       4. UICollectionReusableView
          1. UICollectionViewCell
       5. UIControl
          1. UIButton
          2. UIDatePicker
          3. UIPageControl
          4. UIRefreshControl
          5. UISegmentedControl
          6. UISlider
          7. UIStepper
          8. UISwitch
          9. UITextField
       6. UIImageView
       7. UIInputView
       8. UILabel
       9. UINavigationBar
       10. UIPickerView
       11. UIPopoverBackgroundView
       12. UIProgressView
       13. UIScrollView
           1. UICollectionView
           2. UITableView
           3. UITextView
       14. UISearchBar
       15. UIStackView
       16. UITabBar
       17. UITableViewCell
       18. UITableViewHeaderFooterView
       19. UIToolbar
       20. UIVisualEffectView
       21. UIWebView
       22. UIWindow
    3. UIViewController
       1. UIActivityViewController
       2. UIAlertController
       3. UICloudSharingController
       4. UICollectionViewController
       5. UIDocumentBrowserViewController
       6. UIDocumentMenuViewController
       7. UIDocumentPickerViewController
       8. UIDocumentPickerExtensionViewController
       9. UIInputViewController
       10. UINavigationController
           1. UIImagePickerController
           2. UIVideoEditorController
       11. UIPageViewController
       12. UIReferenceLibraryViewController
       13. UISearchContainerViewController
       14. UISearchController
       15. UISplitViewController
       16. UITabBarController
       17. UITableViewController
90. UIScreen
91. UIScreenMode
92. UISearchDisplayController
93. UISpringLoadedInteraction
94. UIStoryboard
95. UIStoryboardSegue
    1. UIStoryboardPopoverSegue
96. UIStoryboardUnwindSegueSource
97. UISwipeActionsConfiguration
98. UITableViewPlaceholder
    1. UITableViewDropPlaceholder
99. UITableViewRowAction
100. UITargetedDragPreview
101. UITextChecker
102. UITextDragPreviewRenderer
103. UITextInputAssistantItem
104. UITextInputMode
105. UITextInputStringTokenizer
106. UITextPosition
107. UITextRange
108. UISelectionRect
109. UITouch
110. UITraitCollection
111. UIUserActivity
112. UIUserNotificationAction
     1. UIMutableUserNotificationAction
113. UIUserNotificationCategory
     1. UIMutableUserNotificationCategory
114. UIUserNotificationSetting
115. UIVisualEffect
     1. UIBlurEffect
     2. UIVibrancyEffect