NSScreencast Episode #43 AVAudioPlayer

AVAudioPlayer - NSScreencast

自作のAudioプレーヤー

• AVFoundation framework
  • #import <AVFoundation/AVFoundation.h>
• AVAudioPlayer
  • [[AVAudioPlayer alloc] initWithContentsOfURL:[self localAudioFileURL]
    • initWithData:error
  • self.audioPlayer.volume
    • = self.volumeSlider.value;
  • if (![self.audioPlayer isPlaying])
  • toggle pause button
  • [self.audioPlayer play];
  • [self.audioPlayer pause];
• UIProgressView
  • [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(onTimerTick:) userInfo:nil repeats:YES];
  • NSTimeInterval totalTime = [self.audioPlayer duration];
  • NSTimeInterval currentTime = [self.audioPlayer currentTime];
  • CGFloat progress = currentTime / totalTime;
  • self.songProgressView.progress = progress;
• AudioLevelsView
  • 音の波を表示
  • Audio Level
  • channel
  • audioPlayer.meteringEnabled = YES;
  • [self.audioPlayer updateMeters];

動画中で使われている楽曲

♫ Alice In Chains - Angry Chair