I solved this problem. This audioplayback design was not good. Recursive call increase memory. So, I find out another design approach. Dependency Injection. And, then memory problem has been solved!

Sorry. I forgot attaching my code. 　 VIEW import SwiftUI struct ContentView: View {       let apm = AudioPlayManager()       var body: some View {     Button(action: {       self.apm.startPlayAudio(){ audioMangeCompletion in          print("play is finished")       }     }, label: {       Text("Push")     })   } } AudioPlayManager import SwiftUI import AVFoundation public class AudioPlayManager{       let items:[String] = ["sound01", "sound02", "sound03"]   let isLoopPlay = true   var playingIndex = 0       let apm = AudioPlayFunction.shared       func startPlayAudio(completion: @escaping (Bool) -> Void){           playAudio() { isAudioPlayComplete in       completion(true)     }   }       private func playAudio(completion: @escaping (Bool) -> Void){     let i = playingIndex           print("i: \(i) items.count: \(items.count)")           if(i >= items.count && isLoopPlay){       playingIndex = 0       let fileURL = URL(fileURLWithPath: Bundle.main.path(forResource: items[0], ofType: "mp3") ?? "")       print("fileURL: \(fileURL)")       apm.playMP3(url: fileURL){ playMP3complete in         self.playingIndex += 1         self.playAudio() { playAudioCompletion in           completion(true)         }       }     } else {       let fileURL = URL(fileURLWithPath: Bundle.main.path(forResource: items[i], ofType: "mp3") ?? "")       print("fileURL: \(fileURL)")       apm.playMP3(url: fileURL){ playMP3complete in         self.playingIndex += 1         self.playAudio() { playAudioCompletion in           completion(true)         }       }     }   }     } AudioPlayFunction import Foundation import AVFoundation class AudioPlayFunction: NSObject, AVAudioPlayerDelegate {   static let shared = AudioPlayFunction()       var audioPlayer: AVAudioPlayer?   private var observer: NSObjectProtocol?       override init() {     super.init()   }       func playMP3(url: URL, completion: @escaping (Bool) -> Void){     do {       print("url: \(url)")       audioPlayer = try AVAudioPlayer(contentsOf: url, fileTypeHint: AVFileType.mp3.rawValue)       audioPlayer?.delegate = self       audioPlayer?.play()       print("sound is playing")     } catch let error {       print("Sound Play Error -> \(error)")     }           if(observer == nil){       print("create observer")       observer = NotificationCenter.default.addObserver(forName: NSNotification.Name("audioStatus"), object: nil, queue: .main){ (_) in                   let speechStatus = UserDefaults.standard.value(forKey: "audioStatus") as? Bool ?? false                   if speechStatus {           print("audio completion signal is received")           completion(true)         }                 }     }         }           func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {     print("Audio Play Stop ")     UserDefaults.standard.set(true, forKey: "audioStatus")     NotificationCenter.default.post(name:NSNotification.Name("audioStatus"), object: nil)   }       public func stopSpeech(){     self.audioPlayer?.stop()           print("User stop audio play")     UserDefaults.standard.set(true, forKey: "audioStatus")     NotificationCenter.default.post(name:NSNotification.Name("audioStatus"), object: nil)         } } Thanks

No one may know on it. so, for kind of a matter, other design pattern may be required... Delegation or .sink is just for sending a signal(not value..). If value pass is required, then management side should manage that? I keep investigating on it.

I've tried above. What do you get when you change print(error.localizedDescription) to print(error)? I'm sorry. That error message seems not to be for AVPlayer. For sharing my code, I tried to write some prints in several places. Then, I found the guess. latest situation is "no error message and play "API" looks being success but actual sound is not played" code I will share all code as below. I hope that problem will be found.. import SwiftUI import AVFoundation struct ContentView: View {       @State var message: String = "Test Message2"   @State var storedURL: URL       var body: some View {     Text(message)       .onTapGesture {         guard let path = Bundle.main.path(forResource: "selectSE", ofType: "mp3") else {           print("Sound file not found")           return         }         let url = URL(fileURLWithPath: path)         do {           let fileData = try Data(contentsOf: url)           storedURL = saveDataFile(data: fileData, fileName: "test.mp3", folderName: "testFolder")                       print("File Writing on View -> Success \(storedURL.absoluteString) ")         } catch {                     }                   do {           let audioPlayer = try AVAudioPlayer(contentsOf: storedURL, fileTypeHint: AVFileType.mp3.rawValue)           audioPlayer.play()           print("sound is playing")         } catch let error {           print("Sound Play Error.lDescription -> \(error.localizedDescription)")           print("Sound Play Error -> \(error)")         }         print("end of code")                 }   }       func saveDataFile(data:Data, fileName: String, folderName: String) -> URL {           let directoryUrl = self.getLibraryDirectory().appendingPathComponent(folderName, isDirectory: true)                   do {       try FileManager.default.createDirectory(at: directoryUrl, withIntermediateDirectories: true)       print("Directory Creation -> Success \n \(directoryUrl)")     } catch {       print("Directory Creation -> Failed")     }                 let url = directoryUrl.appendingPathComponent(fileName)           do {       try data.write(to: url, options: .atomic )       // let input = try String(contentsOf: url)       print("File Writing -> Success")     } catch {       print("File Writing -> Error \n \(error.localizedDescription)")             }               return url   }       func getLibraryDirectory() -> URL {     // find all possible documents directories for this user     let paths = FileManager.default.urls(for: .libraryDirectory, in: .userDomainMask)     // just send back the first one, which ought to be the only one     return paths[0]   } } struct ContentView_Previews: PreviewProvider {   static var previews: some View {     ContentView(storedURL: URL(string: "")!)   } } print there is not error message but I will share for reference. Directory Creation -> Success   file:///var/mobile/Containers/Data/Application/C275FFD9-2635-47D9-B349-EC945733175C/Library/testFolder/ File Writing -> Success File Writing on View -> Success file:///var/mobile/Containers/Data/Application/C275FFD9-2635-47D9-B349-EC945733175C/Library/testFolder/test.mp3  sound is playing end of code

For posting code block, I replies on answers.

Thank you for your reply! I'll try that on print and share with Code Block feature. (I have learned the feature thanks to you)

Thank you for sharing the solution. That helps a lot. Following the keywords that these articles write down, I searched another information for SwiftUI. Then I found that. https://stackoverflow.com/questions/57151335/how-to-animate-images-in-swiftui-to-play-a-frame-animation (I choose the way to split animated gifs to multiple png images) Thanks to your information, I could reach the solution. Thank you so much :-)

Thank you for sharing the solution. That helps a lot. Following the keywords that these articles write down, I searched another information for SwiftUI. Then I found that. https://stackoverflow.com/questions/57151335/how-to-animate-images-in-swiftui-to-play-a-frame-animation Thanks to your information, I could reach the solution. Thank you so much :-)

@Claude31 I've tried to set as "Original image" on Attributes inspector of xcAssets. Then, problem has been solved. The picture of the body area of png image has been shown. Thank you so much! :-) @OOPer Thank you for your reply :-)