I am writing a small audio recorder / player for use on my iPad, based on Apple's SpeakHere audio application example. When the user asks for the recorder to display, the UIView opens and displays the record / stop buttons and counters.
When I download the application from scratch, I can record, stop recording, record again anytime I want. After stopping the recording, I put the application in the background, for example, to read my mail. When re-placing the foreground of audio recordings, it is not possible to record sound. I received an error message in my log, the counter does not display any data, and the sound file is not created. I noticed the same behavior with the SpeakHere sample application on both the iPhone and iPad. The only solution is to exit and restart the application.
To deal with this, I decided to turn off the view controller when the user finished using the recorder. I disabled ARC for the record view controller and wrote its dealloc method. In the viewDidDisappear of this controller, I put a call to [self dealloc].
But the program will fail by sending the message [RecorderViewController childViewControllersCount]: sent to the freed instance. I believe that such self-disclosure is not allowed ...
I need to find a solution, either ...
Find a way to properly manage audio when the application goes into the background (when recording is stopped, I don’t understand why such a problem occurs).
Or, correctly release the recorder's view controller when its view is closed, to ensure that at any time when the view appears, it is loaded again from the controller's XIB file.
[UPDATED] . After looking at the aurioTouch application code (another example audio for the Apple dev website), I added the following code to my application delegate:
- (void)applicationDidBecomeActive:(UIApplication *)application
{
AudioSessionSetActive(true);
}
, , SpeakHere... , , !