Fix issue where animation size could be incorrect after loading async animation

.github/workflows/main.yml

@@ -33,6 +33,7 @@ jobs:
       matrix:
         xcode:
         - '15.2' # Swift 5.9
+        - '15.3' # Swift 5.10
     steps:
       - uses: actions/checkout@v2
       - uses: ./.github/actions/setup
@@ -49,7 +50,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: ./.github/actions/setup
         with:
-          xcode: '15.2' # Swift 5.9
+          xcode: '15.3' # Swift 5.10
       - name: Build Example
         run: bundle exec rake build:example:all
 
@@ -60,7 +61,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: ./.github/actions/setup
         with:
-          xcode: '15.2' # Swift 5.9
+          xcode: '15.3' # Swift 5.10
       - name: Test Package
         run: bundle exec rake test:package
       - name: Process test artifacts
@@ -150,7 +151,7 @@ jobs:
     strategy:
       matrix:
         xcode:
-          - '15.2' # Swift 5.9, first Xcode version with visionOS
+          - '15.3' # Swift 5.10
     steps:
       - uses: actions/checkout@v2
       - uses: ./.github/actions/setup
@@ -166,7 +167,7 @@ jobs:
     strategy:
       matrix:
         xcode:
-        - '15.2' # Swift 5.9
+        - '15.3' # Swift 5.10
     steps:
       - uses: actions/checkout@v2
       - uses: ./.github/actions/setup
@@ -185,7 +186,7 @@ jobs:
         with:
           install-mint: true
           install-carthage: true
-          xcode: '15.2' # Swift 5.9
+          xcode: '15.3' # Swift 5.10
       - name: Test Carthage support
         run: bundle exec rake test:carthage
 

Example/Example/AnimationListView.swift

@@ -35,7 +35,7 @@ struct AnimationListView: View {
               Text(item.name)
             }
 
-          case .animationList, .controlsDemo, .swiftUIInteroperability:
+          case .animationList, .controlsDemo, .swiftUIInteroperability, .lottieViewLayoutDemo:
             Text(item.name)
               .frame(height: 50)
           }
@@ -52,6 +52,8 @@ struct AnimationListView: View {
             ControlsDemoView()
           case .swiftUIInteroperability:
             SwiftUIInteroperabilityDemoView()
+          case .lottieViewLayoutDemo:
+            LottieViewLayoutDemoView()
           }
         }
       }
@@ -72,7 +74,7 @@ struct AnimationListView: View {
       guard let url = urls.first else { return nil }
       return await LottieAnimation.loadedFrom(url: url)?.animationSource
 
-    case .animationList, .controlsDemo, .swiftUIInteroperability:
+    case .animationList, .controlsDemo, .swiftUIInteroperability, .lottieViewLayoutDemo:
       return nil
     }
   }
@@ -104,6 +106,7 @@ extension AnimationListView {
     case remoteAnimations(name: String, urls: [URL])
     case controlsDemo
     case swiftUIInteroperability
+    case lottieViewLayoutDemo
   }
 
   var items: [Item] {
@@ -159,6 +162,7 @@ extension AnimationListView {
       .animationList(.remoteAnimationsDemo),
       .controlsDemo,
       .swiftUIInteroperability,
+      .lottieViewLayoutDemo,
     ]
   }
 }
@@ -174,6 +178,8 @@ extension AnimationListView.Item {
       return "Controls Demo"
     case .swiftUIInteroperability:
       return "SwiftUI Interoperability Demo"
+    case .lottieViewLayoutDemo:
+      return "LottieView Layout Demo"
     }
   }
 }

Example/Example/LottieViewLayoutDemoView.swift

@@ -4,7 +4,7 @@
 import Lottie
 import SwiftUI
 
-struct ContentView: View {
+struct LottieViewLayoutDemoView: View {
   var body: some View {
     HStack {
       VStack {
@@ -35,7 +35,18 @@ struct ContentView: View {
         LottieView(animation: .named("Samples/LottieLogo1"))
           .looping()
 
-        Text("intrinsic content size")
+        Text("automatic size")
+      }
+
+      VStack {
+        LottieView {
+          try await Task.sleep(for: .seconds(1))
+          return LottieAnimation.named("Samples/LottieLogo1")
+        }
+        .intrinsicSize()
+        .looping()
+
+        Text("intrinsic size, async")
       }
     }
     .frame(maxWidth: .infinity, maxHeight: .infinity)

Sources/Public/Animation/LottieView.swift

@@ -125,7 +125,7 @@ public struct LottieView<Placeholder: View>: UIViewConfiguringSwiftUIView {
     }
     .sizing(sizing)
     .configure { context in
-      applyCurrentAnimationConfiguration(to: context.view)
+      applyCurrentAnimationConfiguration(to: context.view, in: context.container)
     }
     .configurations(configurations)
     .opacity(animationSource == nil ? 0 : 1)
@@ -152,14 +152,22 @@ public struct LottieView<Placeholder: View>: UIViewConfiguringSwiftUIView {
     return copy
   }
 
-  /// Returns a copy of this view that can be resized by scaling its animation to fit the size
-  /// offered by its parent.
+  /// Returns a copy of this view that can be resized by scaling its animation
+  /// to always fit the size offered by its parent.
   public func resizable() -> Self {
     var copy = self
     copy.sizing = .proposed
     return copy
   }
 
+  /// Returns a copy of this view that adopts the intrinsic size of the animation,
+  /// up to the proposed size.
+  public func intrinsicSize() -> Self {
+    var copy = self
+    copy.sizing = .intrinsic
+    return copy
+  }
+
   @available(*, deprecated, renamed: "playing()", message: "Will be removed in a future major release.")
   public func play() -> Self {
     playbackMode(.playing(.fromProgress(nil, toProgress: 1, loopMode: .playOnce)))
@@ -501,7 +509,10 @@ public struct LottieView<Placeholder: View>: UIViewConfiguringSwiftUIView {
   }
 
   /// Applies playback configuration for the current animation to the `LottieAnimationView`
-  private func applyCurrentAnimationConfiguration(to view: LottieAnimationView) {
+  private func applyCurrentAnimationConfiguration(
+    to view: LottieAnimationView,
+    in container: SwiftUIMeasurementContainer<LottieAnimationView>)
+  {
     guard let animationSource else { return }
     var imageProviderConfiguration = imageProviderConfiguration
     var playbackMode = playbackMode
@@ -543,6 +554,10 @@ public struct LottieView<Placeholder: View>: UIViewConfiguringSwiftUIView {
     if animationSource.animation !== view.animation {
       view.loadAnimation(animationSource)
       animationDidLoad?(animationSource)
+
+      // Invalidate the intrinsic size of the SwiftUI measurement container,
+      // since any cached measurements will be out of date after updating the animation.
+      container.invalidateIntrinsicContentSize()
     }
 
     if