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标题: ios - 同时播放多首歌曲 [打印本页]

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作者: 菜鸟教程小白    时间: 2022-12-11 18:21
标题: ios - 同时播放多首歌曲

我有 five.caf 文件(具有不同音乐家的声音)，我想同时播放多个文件。为此，我使用了 AVAudioPlayer 类。我创建了五个 AVAudioPlayer 实例并设置了 url 并播放歌曲。但它没有正确同步。看起来一两个音乐家的声音会延迟一秒钟。 如何同时同步所有歌曲并播放。

下面是我的代码:

// Song1
NSString *FilePath = [NSString stringWithFormat"%@/songs/%@", [[GlobalClass sharedInstance] GetDocPath], SongFileName];
NSString *url = [FilePath stringByAppendingString"/Song1.caf"];
player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:url] error:nil];
[player setDelegate:self];
[player prepareToPlay];
player.numberOfLoops = 0;

// Song2
NSString *url1 = [FilePath stringByAppendingString"/Song2.caf"];
player1 = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:url1] error:nil];
[player1 setDelegate:self];
[player1 prepareToPlay];
player1.numberOfLoops = 0;

// Song3
NSString *url2 = [FilePath stringByAppendingString"/Song3.caf"];
player2 = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:url2] error:nil];
[player2 setDelegate:self];
[player2 prepareToPlay];
player2.numberOfLoops = 0;

// Song4
NSString *url3 = [FilePath stringByAppendingString"/Song4.caf"]; // ALT.caf
player3 = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:url3] error:nil];
[player3 setDelegate:self];
[player3 prepareToPlay];
player3.numberOfLoops = 0;
NSLog(@"player3: %f", player3.duration);

// Song5
NSString *url4 = [FilePath stringByAppendingString"/Song5.caf"]; 
player4 = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:url4] error:nil];
[player4 setDelegate:self];
[player4 prepareToPlay];
player4.numberOfLoops = 0;

[player play]; // Band
[player1 play]; // Song1
[player2 play]; // Song2
[player3 play]; // Song3
[player4 play]; // Song4

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Best Answer-推荐答案

创建一个并发调度队列，并在调度队列的并发分支中播放文件

dispatch_queue_t parallelQueue = dispatch_queue_create("com.unique.name.queue", DISPATCH_QUEUE_CONCURRENT);

dispatch_async(parallelQueue, ^{
    [player play];
});
dispatch_async(parallelQueue, ^{
    [player1 play];
});
dispatch_async(parallelQueue, ^{
     [player2 play];
});
dispatch_async(parallelQueue, ^{
     [player3 play];
});
dispatch_async(parallelQueue, ^{
     [player4 play];
});

希望这会有所帮助。

关于ios - 同时播放多首歌曲，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41235312/

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