Fix picture-in-picture issue

Author: qinhui

iOS/APIExample-SwiftUI/APIExample-SwiftUI/Examples/Advanced/PictureInPicture/CustomRender/CustomRenderExample.swift

@@ -49,7 +49,7 @@ struct CustomRenderExample: View {
         VStack(spacing: 30) {
             PIPDisplayView(viewModel: pipViewModel)
                 .frame(maxWidth: .infinity, maxHeight: 200)
-        
+            
             Button {
                 pipViewModel.togglePiP()
             } label: {
@@ -78,7 +78,6 @@ struct CustomRenderExample: View {
             customRenderViewModel.cleanRtc()
         }
         .frame(maxWidth: .infinity, maxHeight: .infinity)
-        .adaptiveBackground(Color.orange)
     }
 }
 

iOS/APIExample-SwiftUI/APIExample-SwiftUI/Examples/Advanced/PictureInPicture/PIPCommon/PIPDisplayView.swift

@@ -100,14 +100,24 @@ extension PIPViewModel: AVPictureInPictureControllerDelegate {
         guard let vc = pictureInPictureController.contentSource?.activeVideoCallContentViewController, let pipSourceView = backgroundView.pipSourceView else { return }
 
         vc.view.addSubview(pipSourceView)
-        pipSourceView.frame = vc.view.bounds
+        pipSourceView.translatesAutoresizingMaskIntoConstraints = false
+        NSLayoutConstraint.activate([
+            pipSourceView.leadingAnchor.constraint(equalTo: vc.view.leadingAnchor),
+            pipSourceView.trailingAnchor.constraint(equalTo: vc.view.trailingAnchor),
+            pipSourceView.topAnchor.constraint(equalTo: vc.view.topAnchor),
+            pipSourceView.bottomAnchor.constraint(equalTo: vc.view.bottomAnchor)
+        ])
+        vc.view.layoutIfNeeded()
     }
 
     func pictureInPictureControllerDidStopPictureInPicture(_ pictureInPictureController: AVPictureInPictureController) {
         guard let pipSourceView = backgroundView.pipSourceView else { return }
 
         pipSourceView.removeFromSuperview()
         backgroundView.addSubview(pipSourceView)
+        pipSourceView.frame = backgroundView.bounds
+        pipSourceView.setNeedsLayout()
+        pipSourceView.layoutIfNeeded()
     }
 }
 

iOS/APIExample-SwiftUI/APIExample-SwiftUI/Examples/Advanced/PictureInPicture/SDKRender/SDKRenderExample.swift

@@ -13,7 +13,7 @@ struct SDKRenderMockContainerView: View {
 
     var body: some View {
         HStack {
-            localView.frame(maxWidth: 200)
+            localView
             ForEach(viewModel.remoteRenderViews) { view in
                 view
             }
@@ -77,7 +77,6 @@ struct SDKRenderExample: View {
             sdkRenderViewModel.cleanRtc()
         }
         .frame(maxWidth: .infinity, maxHeight: .infinity)
-        .adaptiveBackground(Color.orange)
     }
 }