How to make audioplayer play again? - iphone

Question

I have 2 view controller and I play a music with AVAudioPlayer in the first view controller.
I go to second view controller and stop the music :
[audioPlayer stop];
[UIView beginAnimations:#"Curl View" context:nil];
[UIView setAnimationDuration:0.5];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.view cache:YES];
[self.view addSubview:secondController.view];
[UIView commitAnimations];
When I go back to first view controller again, I want to play my music again but the code doesn't touch viewDidLoad again.
Here is my code to go back :
[UIView beginAnimations:#"Flipping View" context:nil];
[UIView setAnimationDuration:0.5];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.view.superview cache:YES];
[self.view removeFromSuperview];
[UIView commitAnimations];
Please share me some solutions or what the code execute after that..Thanks in advance

Answer 1

This is happens Only because of you are calling your Music Playing code from viewDidLoad
And viewDidLoad method calls Only One time For ViewController.
You should Call your code(Playing Music) from viewWillAppear instead of viewDidLoad method.
I suggest you should read UIViewControler Documentation.
Updated Answer:As you want to Play the Music File at the time of loading and Coming back to View .
There may some problem regarding the Performance.
Because you calls the Music file immediately loading time of view.
So View below Lines of explaination.
ViewDidLoad - This method is called after the view controller has loaded its view hierarchy into memory. This method is called regardless of whether the view hierarchy was loaded from a nib file or created programmatically in the loadView method. You usually override this method to perform additional initialization on views that were loaded from nib files.
ViewWillAppear:When this gets called, it means that the iPhone is already ready to show the UIView to the user, and anything heavy you do here will impact performance in a very visible manner (like animations being delayed,or playing music etc).
ViewDidAppear: Finally,This Notifies the view controller that its view was added to a view hierarchy.so this method is good enough for such task Like for example playing music file.Note-->you must call super at some point in your implementation.

Answer 2

Write you play code in viewWillAppear: , it is called when ever your view is appeared.
viewDidLoad: is called only once for a view controller
Update
Use these line to remove your second view
[super viewWillAppear:animated];
UIView beginAnimations:#"Flipping View" context:nil];
[UIView setAnimationDuration:0.5];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector(animationEnded)];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.view.superview cache:YES];
[self.view removeFromSuperview];
[UIView commitAnimations];
And this method will be called when view is removed
- (void)animationEnded{
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:#"%#/BGMCover2.mp3", [[NSBundle mainBundle] resourcePath]]];
NSError *error; audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error]; audioPlayer.numberOfLoops = -1;
[audioPlayer play];
}

Answer 3

Before doing your application please get deep knowledge of UIViewController life cycle. You can follow the following link :
UIViewController Life Cycle