iPhone背景音樂播放器

Question

任何人都可以將我引導到教程中，或者向我顯示實際的代碼來播放背景音樂。 我需要它能夠啟動和停止。 這不是一項任務，所以您知道。 我的作業已經完成，我只想向其中添加音樂，但我不知道如何做。 謝謝！

Answer 1

您可以使用AVAudioPlayer

//You have to import AvFoundation to use AVAudioPlayer
#import <AVFoundation/AVFoundation.h>

-(void) playMusicFile:(NSString *) songName
{   
    NSString *musicFile = [[NSBundle mainBundle] pathForResource:songName ofType:@"mp3"];

    NSError *soundError = nil;
    self.audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:musicFile] error:&soundError];
    if(self.audioPlayer == nil)
    {
        NSLog(@"%@",soundError);
    }
    else
    {
        //Delegation is optional but it helps you do stuff after song finished playing etc
        [self.audioPlayer setDelegate:self];
        //Set number of repeats, 0 is default plays once, negative values makes it play infinitely
        [self.audioPlayer setNumberOfLoops:0];
        //Prepare to play is not always necessary, but otherwise it can take time to play
        [self.audioPlayer prepareToPlay];
        [self.audioPlayer play];
    }
}

//This is the delegate called after the song finished playing, you can use it to play other songs, or do other stuff
-(void) audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag
{
    ...
}

停止和暫停：

//You can easily stop and pause using: 
[self.audioPlayer stop]; //Stop doesn't work as you would expect. It doesn't set the current time to 0 but only undoes the setup you had with the audioplayer.
[self.audioPlayer pause];

//It is possible to call [self.audioPlayer play] after each method and playback will continue from where it left off.

有關更多信息，請訪問參考： http : //developer.apple.com/library/ios/#DOCUMENTATION/AVFoundation/Reference/AVAudioPlayerClassReference/Reference/Reference.html

Answer 2

AVPlayer和AVAudioPlayer應該可以工作。