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我想從我的iPhone模擬器錄製音頻,然後將其保存到目錄中,然後播放。由於我聽不到我錄製的音頻,我甚至不確定它是否在錄音。這裏是我的代碼:在iPhone編程中錄製和播放音頻
-(IBAction) playRecording:sender
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *dir = [paths objectAtIndex:0];
NSFileManager *filemanager = [NSFileManager defaultManager];
NSArray *files = [filemanager contentsOfDirectoryAtPath:dir error:nil];
NSString *file = [files objectAtIndex:0];
NSString *path = [dir stringByAppendingPathComponent:file];
NSURL *url = [NSURL URLWithString:path]; // url is nil
AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
player.volume = 0.3;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[player play];
}
-(IBAction) record:sender
{
if(recorder.recording)
{
[recorder stop];
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategorySoloAmbient error:nil];
[recordButton setTitle:@"Record" forState:UIControlStateNormal];
}
else
{
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryRecord error:nil];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
NSString *dir = [paths objectAtIndex:0];
NSString *filename = [[NSString alloc] initWithString:@"myfile.caf"];
NSString *path = [dir stringByAppendingPathComponent:filename];
NSMutableDictionary *settings = [[NSMutableDictionary alloc] init];
[settings setValue:[NSNumber numberWithInt:kAudioFormatAppleLossless] forKey:AVFormatIDKey];
[settings setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[settings setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey];
[settings setValue:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
[settings setValue:[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey];
[settings setValue:[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey];
[recorder release];
recorder = [[AVAudioRecorder alloc] initWithURL:[NSURL fileURLWithPath:path]
settings:settings error:nil];
[recorder prepareToRecord];
recorder.meteringEnabled = YES;
[recorder record];
[recordButton setTitle:@"Stop" forState:UIControlStateNormal];
}
}
更新1:
在playRecording url變量總是評價爲爲零。