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SwiftUI _viewDebugData
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// SwiftUI public _ViewDebug.Property definition | |
public enum _ViewDebug { | |
public enum Property : Swift.UInt32, Swift.Hashable { | |
case type | |
case value | |
case transform | |
case position | |
case size | |
case environment | |
case phase | |
case layoutComputer | |
case displayList | |
public init?(rawValue: Swift.UInt32) | |
public typealias RawValue = Swift.UInt32 | |
public var rawValue: Swift.UInt32 { get } | |
} | |
} |
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// Output of print(_viewDebugData), formatted for easier viewing | |
[SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.value: SwiftUI._SafeAreaInsetsModifier(elements: [], nextInsets: nil), | |
SwiftUI._ViewDebug.Property.displayList: (display-list | |
(item #:identity 2 #:version 6 | |
(frame (143.66666666666666 354.0; 88.0 20.333333333333332)) | |
(text "Hello World" #:size (88.0, 20.333333333333332)) | |
) | |
), | |
SwiftUI._ViewDebug.Property.size: (375.0, 728.0), | |
SwiftUI._ViewDebug.Property.position: (0.0, 0.0), | |
SwiftUI._ViewDebug.Property.transform: translate(0.0, -50.0), space(HostingViewCoordinateSpace()), | |
SwiftUI._ViewDebug.Property.type: SwiftUI._SafeAreaInsetsModifier | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.transform: translate(0.0, -50.0), space(HostingViewCoordinateSpace()); sizedSpace(UniqueID(value: 77), 375.0, 728.0), | |
SwiftUI._ViewDebug.Property.position: (143.5, 353.8333333333333), | |
SwiftUI._ViewDebug.Property.type: SwiftUI.ModifiedContent<SwiftUI.ModifiedContent<Previews.HelloWorldView, SwiftUI.EditModeScopeModifier>, SwiftUI.HitTestBindingModifier>, | |
SwiftUI._ViewDebug.Property.value: SwiftUI.ModifiedContent<SwiftUI.ModifiedContent<Previews.HelloWorldView, SwiftUI.EditModeScopeModifier>, SwiftUI.HitTestBindingModifier>( | |
content: SwiftUI.ModifiedContent<Previews.HelloWorldView, SwiftUI.EditModeScopeModifier>( | |
content: Previews.HelloWorldView(), | |
modifier: SwiftUI.EditModeScopeModifier(_editMode: SwiftUI.State<SwiftUI.EditMode>(_value: SwiftUI.EditMode.inactive, _location: nil)) | |
), | |
modifier: SwiftUI.HitTestBindingModifier() | |
), | |
SwiftUI._ViewDebug.Property.size: (88.0, 20.333333333333332) | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.value: SwiftUI.HitTestBindingModifier(), | |
SwiftUI._ViewDebug.Property.type: SwiftUI.HitTestBindingModifier | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.type: SwiftUI.ModifiedContent<Previews.HelloWorldView, SwiftUI.EditModeScopeModifier>, | |
SwiftUI._ViewDebug.Property.value: SwiftUI.ModifiedContent<Previews.HelloWorldView, SwiftUI.EditModeScopeModifier>( | |
content: Previews.HelloWorldView(), | |
modifier: SwiftUI.EditModeScopeModifier(_editMode: SwiftUI.State<SwiftUI.EditMode>(_value: SwiftUI.EditMode.inactive, _location: nil)) | |
) | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.type: SwiftUI.EditModeScopeModifier, | |
SwiftUI._ViewDebug.Property.value: SwiftUI.EditModeScopeModifier(_editMode: SwiftUI.State<SwiftUI.EditMode>(_value: SwiftUI.EditMode.inactive, _location: nil)) | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.value: SwiftUI.ModifiedContent<SwiftUI._ViewModifier_Content<SwiftUI.EditModeScopeModifier>, | |
SwiftUI._EnvironmentKeyWritingModifier<Swift.Optional<SwiftUI.Binding<SwiftUI.EditMode>>>>(content: SwiftUI._ViewModifier_Content<SwiftUI.EditModeScopeModifier>(), modifier: SwiftUI._EnvironmentKeyWritingModifier<Swift.Optional<SwiftUI.Binding<SwiftUI.EditMode>>>(keyPath: Swift.WritableKeyPath<SwiftUI.EnvironmentValues, Swift.Optional<SwiftUI.Binding<SwiftUI.EditMode>>>, value: Optional(SwiftUI.Binding<SwiftUI.EditMode>(transaction: SwiftUI.Transaction(plist: []), location: SwiftUI.StoredLocation<SwiftUI.EditMode>, _value: SwiftUI.EditMode.inactive)))), | |
SwiftUI._ViewDebug.Property.type: SwiftUI.ModifiedContent<SwiftUI._ViewModifier_Content<SwiftUI.EditModeScopeModifier>, SwiftUI._EnvironmentKeyWritingModifier<Swift.Optional<SwiftUI.Binding<SwiftUI.EditMode>>>> | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.value: SwiftUI._EnvironmentKeyWritingModifier<Swift.Optional<SwiftUI.Binding<SwiftUI.EditMode>>>(keyPath: Swift.WritableKeyPath<SwiftUI.EnvironmentValues, Swift.Optional<SwiftUI.Binding<SwiftUI.EditMode>>>, value: Optional(SwiftUI.Binding<SwiftUI.EditMode>(transaction: SwiftUI.Transaction(plist: []), location: SwiftUI.StoredLocation<SwiftUI.EditMode>, _value: SwiftUI.EditMode.inactive))), | |
SwiftUI._ViewDebug.Property.type: SwiftUI._EnvironmentKeyWritingModifier<Swift.Optional<SwiftUI.Binding<SwiftUI.EditMode>>> | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.value: SwiftUI._ViewModifier_Content<SwiftUI.EditModeScopeModifier>(), | |
SwiftUI._ViewDebug.Property.type: SwiftUI._ViewModifier_Content<SwiftUI.EditModeScopeModifier> | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.value: Previews.HelloWorldView(), | |
SwiftUI._ViewDebug.Property.type: Previews.HelloWorldView | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.value: SwiftUI.Text(storage: SwiftUI.Text.Storage.anyTextStorage(SwiftUI.(unknown context at $10f32f608).LocalizedTextStorage), modifiers: []), | |
SwiftUI._ViewDebug.Property.type: SwiftUI.Text | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.value: SwiftUI.AccessibilityStyledTextContentView(text: Hello World, unresolvedText: SwiftUI.Text(storage: SwiftUI.Text.Storage.anyTextStorage(SwiftUI.(unknown context at $10f32f608).LocalizedTextStorage), modifiers: [])), | |
SwiftUI._ViewDebug.Property.type: SwiftUI.AccessibilityStyledTextContentView | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.type: SwiftUI.ModifiedContent<SwiftUI.StyledTextContentView, SwiftUI.AccessibilityAttachmentModifier>, | |
SwiftUI._ViewDebug.Property.value: SwiftUI.ModifiedContent<SwiftUI.StyledTextContentView, SwiftUI.AccessibilityAttachmentModifier>( | |
content: SwiftUI.StyledTextContentView(text: Hello World), | |
modifier: SwiftUI.AccessibilityAttachmentModifier(storage: SwiftUI.AccessibilityAttachmentModifier.(unknown context at $10f317b48).Storage.propertiesComponent([SwiftUI.(unknown context at $10f317958).ReplacingPropertiesComponent<SwiftUI.AccessibilityNullableOptionSet<SwiftUI.AccessibilityVisibility>>, SwiftUI.(unknown context at $10f317958).ReplacingPropertiesComponent<Swift.Optional<() -> SwiftUI.AXAnyViewTypeDescribingBox>>, SwiftUI.(unknown context at $10f317958).ReplacingPropertiesComponent<Swift.Optional<SwiftUI.Text>>, SwiftUI.(unknown context at $10f317a28).CombiningPropertiesComponent<SwiftUI.AccessibilityNullableOptionSet<SwiftUI.AccessibilityTraitSet>>]))) | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.type: SwiftUI.AccessibilityAttachmentModifier, | |
SwiftUI._ViewDebug.Property.value: SwiftUI.AccessibilityAttachmentModifier(storage: SwiftUI.AccessibilityAttachmentModifier.(unknown context at $10f317b48).Storage.propertiesComponent([SwiftUI.(unknown context at $10f317958).ReplacingPropertiesComponent<SwiftUI.AccessibilityNullableOptionSet<SwiftUI.AccessibilityVisibility>>, SwiftUI.(unknown context at $10f317958).ReplacingPropertiesComponent<Swift.Optional<() -> SwiftUI.AXAnyViewTypeDescribingBox>>, SwiftUI.(unknown context at $10f317958).ReplacingPropertiesComponent<Swift.Optional<SwiftUI.Text>>, SwiftUI.(unknown context at $10f317a28).CombiningPropertiesComponent<SwiftUI.AccessibilityNullableOptionSet<SwiftUI.AccessibilityTraitSet>>])) | |
], | |
childData: [ | |
SwiftUI._ViewDebug.Data( | |
data: [ | |
SwiftUI._ViewDebug.Property.type: SwiftUI.StyledTextContentView, | |
SwiftUI._ViewDebug.Property.displayList: (display-list | |
(item #:identity 2 #:version 6 | |
(frame (143.66666666666666 354.0; 88.0 20.333333333333332)) | |
(text "Hello World" #:size (88.0, 20.333333333333332)) | |
) | |
), | |
SwiftUI._ViewDebug.Property.value: SwiftUI.StyledTextContentView(text: Hello World) | |
], | |
childData: [] | |
)])])])])])])])])])])])])])] |
It's a private property on UIHostingController
's view (_UIHostingView
):
https://apurin.me/articles/swiftui-secrets/
Thanks. Apparently things have changed across SwiftUI versions. This is now called makeViewDebugData
and produce Data
, which contains a very large JSON.
(lldb) po type(of: view.value(forKey: "makeViewDebugData")!)
Foundation.__NSSwiftData
I'm not sure how it can be mapped to _ViewDebug
, but the unsafeBitCast
from the article does not work as is and probably needs some tweaking.
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From where
_viewDebugData
comes?