objective-c - 在 Xcode 中循环播放音频

Question

我在我的应用程序中播放我想循环播放的声音。我对此的研究并没有完全解决我的问题。

我的代码.m

CFBundleRef mainBundle = CFBundleGetMainBundle();
CFURLRef soundFileURLRef;
soundFileURLRef = CFBundleCopyResourceURL(mainBundle, (CFStringRef) @"ar4", CFSTR 
                                          ("wav"), NULL);


UInt32 soundID;
AudioServicesCreateSystemSoundID (soundFileURLRef, &soundID);
AudioServicesPlaySystemSound (soundID);

我想我需要把这样的东西放进去

numberOfLoops = -1;

但是不确定如何在我的代码中实现，因为我收到 numberOfLoops 的未声明错误。一些建议将不胜感激

Answer 1

这样的事情应该可以解决您的问题：

    NSString* resourcePath = [[NSBundle mainBundle] resourcePath];
    resourcePath = [resourcePath stringByAppendingString:@"/YOURMUSICNAME.mp3"];
    NSLog(@"Path to play: %@", resourcePath);
    NSError* err;

    //Initialize our player pointing to the path to our resource
    player = [[AVAudioPlayer alloc] initWithContentsOfURL:
                 [NSURL fileURLWithPath:resourcePath] error:&err];

    if( err ){
        //bail!
        NSLog(@"Failed with reason: %@", [err localizedDescription]);
    }
    else{
        //set our delegate and begin playback
        player.delegate = self;
        [player play];
        player.numberOfLoops = -1;
        player.currentTime = 0;
        player.volume = 1.0;
    }

然后，如果你想停止它：

[player stop];

或暂停：

[player pause];

并将其导入您的头文件中：

#import <AVFoundation/AVFoundation.h>.   

您当然应该在标题中声明它，然后合成它。

//.h 并添加粗体部分：

@interface ViewController : UIViewController < AVAudioPlayerDelegate > {

AVAudioPlayer *player;
}
@property (nonatomic, retain) AVAudioPlayer *player;

//.m

@synthesize player;