在Xcode中循环音频 [英] Looping Audio in Xcode

问题描述

我在我的应用中播放声音，我想循环播放。我对此的研究并没有完全解决我的问题。

Im playing a sound in my app that I would like to loop. My research into this hasnt quite sorted my issue.

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在

I think I need to put something like this in

numberOfLoops = -1;

但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。一些建议将非常感谢

But unsure how to implement in my code as I get undeclared error for numberOfLoops. Some advice would be very much appreciated

推荐答案

这样的事情可以解决你的问题：

Something like this should do your problem:

    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];

并将其导入头文件中：

#import <AVFoundation/AVFoundation.h>.   

你应该在你的标题中声明它，然后合成它。

You should to ofcourse declare it in your header, then synthesize it.

//。h并添加粗体部分：

//.h and add the bold part:

@interface ViewController：UIViewController< AVAudioPlayerDelegate > {

@interface ViewController : UIViewController <AVAudioPlayerDelegate> {

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

//。m

@synthesize player;

这篇关于在Xcode中循环音频的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！