presentMediaPlayerControllerWithURL dismissing immediately without playing the audio - objective-c

Question

I'm creating a watch application which records an audio and play that audio. The recorded audio is saved in the Apps Groups and I used the following code for playing the audio.
- (void)playAudio
{
// Playing the audio from the url using the default controller
[self presentMediaPlayerControllerWithURL:self.audioFileURL options:#{WKMediaPlayerControllerOptionsAutoplayKey : #YES} completion:^(BOOL didPlayToEnd, NSTimeInterval endTime, NSError * _Nullable error) {
NSLog(#"Error = %#",error);
}];
}
Unfortunately I am getting the following error and the player controller get dismissed immediately.
Error Domain=com.apple.watchkit.errors Code=4 "The operation could not be completed" UserInfo={NSLocalizedFailureReason=An unknown error occurred (1), NSUnderlyingError=0x16daa810 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}, NSLocalizedDescription=The operation could not be completed}.
Then I downloaded a sample project (WatchKitAudioRecorder Sample code) from Apple WatchOS Developer library but they are also having the same issue. I don't know why this is not working even in Apple Sample code :(

Answer 1

Finally I found that the data is not writing to the url path. Also should be written in the following path: Library/Caches/filename.extension
Here is a sample code, which may help someone.
- (void)writeAudioToAppGroupsWithData:(NSData *)audioData
{
// Writing the audio data to the App Groups
NSURL *containerURL = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:APP_GROUP_IDENTIFIER];
containerURL = [containerURL URLByAppendingPathComponent:[NSString stringWithFormat:DIRECTORY_PATH]];
[audioData writeToURL:containerURL atomically:YES];
}
In this case make sure that your DIRECTORY_PATH is Library/Caches/filename.extension. Eg: Library/Caches/Audio.mp3