AVAudioPlayer没有播放Mp3文件我试过但没有运气

Question

您好我使用下面的代码来播放我的本地mp3文件。但没有错误来了。但是mp3没有播放。

protected $primaryKey = "item_id";

Answer 1

检查以下步骤。

1. 您的AppDelegate.m

   #import <AVFoundation/AVAudioSession.h>`<AVFoundation/AVAudioSession.h>
   

2. 您的application:didFinishLaunchingWithOptions:方法

   - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
   {
       self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
       self.window.backgroundColor = [UIColor whiteColor];
       [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
   }
   

3. 在ViewController.h中

   @property (nonatomic,retain) AVAudioPlayer  *audioPlayer ;
   

4. 在您的ViewController.m

   中

   @synthesize audioPlayer;
   

然后

NSString *sound_file;
if ((sound_file = [[NSBundle mainBundle] pathForResource:@"mpthreetest" ofType:@"mp3"])){

    NSURL *url = [[NSURL alloc] initFileURLWithPath:sound_file];
    audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:NULL];
    audioPlayer.delegate = self;

    [audioPlayer prepareToPlay];
    [audioPlayer play];    
}

你犯的错误是你没有设置属性。