iOS开发中如何实现mp3播放

#import 
//加入AVFoundation.framework头文件
#import 

@interface RootViewController : UIViewController

{
  //播放器player
  AVAudioPlayer *avAudioPlayer;
}

@end

#import "RootViewController.h"

//导入AVFoundation.framework
#import 


@interface RootViewController ()

@end

@implementation RootViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
  self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
  if (self) {
    // Custom initialization
  }
  return self;
}

- (void)viewDidLoad
{
  [super viewDidLoad];
  // Do any additional setup after loading the view.
  
  self.title=@"MP3的播放";
}

-(void)initPlay
{
  //从budle路径下读取音频文件
  NSString *string = [[NSBundle mainBundle] pathForResource:@"母亲" ofType:@"mp3"];
  
  //把音频文件转换成url格式
  NSURL *url = [NSURL fileURLWithPath:string];
  
  //初始化音频类 并且添加播放文件
  avAudioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
  
  //开始进行播放
  [avAudioPlayer play];
  
  
}