问题描述
- AVAudioPlayer无法播放音频的问题
-
今天开始做录音的功能。点击recordbtn开始录音,再次点击,则停止录音,点击play键播放录音然后就遇到问题了。
点击play键后,[self.audioPlayer prepareToPlay] 总是为no,即使把这个去掉,强制[self.audioPlayer play];也没有效果,请问是怎么回事?
另:用player播放其他音频是可以的,作为对比测试,播放了一首歌曲,没问题,就是播放自己录制的音频出问题,是不是录制的时候就出错了?
附代码:-(void)record{ NSLog(@"recording"); AVAudioSession *audioSession = [AVAudioSession sharedInstance]; [audioSession setCategory:AVAudioSessionCategoryRecord error:nil]; [audioSession setActive:YES error:nil]; NSString *tripReportAudioPath = [self audioRecordingPath]; NSError *err = nil; NSURL *tripReportAudioURL = [NSURL URLWithString:tripReportAudioPath]; AVAudioRecorder *tripReportRecorder = [[AVAudioRecorder alloc]initWithURL:tripReportAudioURL settings:[self audioRecordingSetting] error:&err]; if (tripReportRecorder != nil) { tripReportRecorder.delegate = self; if ([tripReportRecorder prepareToRecord] && self.recordBtn.selected == NO) { self.recordBtn.selected = YES; [tripReportRecorder record]; }else if (self.recordBtn.selected == YES){ self.recordBtn.selected = NO; [tripReportRecorder stop ]; } }else{ NSLog(@"record err:%@",[err description]); } } //生成录音文件地址 -(NSString *)audioRecordingPath{ NSString *result = nil; NSArray *folders = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *docdir = [folders objectAtIndex:0]; result = [docdir stringByAppendingPathComponent:@"tripReport.caf"]; return result; } //录音器的相关设置 -(NSDictionary *)audioRecordingSetting{ NSDictionary *result = nil; NSMutableDictionary *settings = [[NSMutableDictionary alloc]init ]; //录制的音频格式 [settings setValue:[NSNumber numberWithInteger:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey]; //采样率 [settings setValue:[NSNumber numberWithFloat:44100.0f] forKey:AVSampleRateKey]; //信道数 [settings setValue:[NSNumber numberWithInteger:1] forKey:AVNumberOfChannelsKey]; //录音的质量 [settings setValue:[NSNumber numberWithInteger:AVAudioQualityHigh] forKey:AVEncoderAudioQualityKey]; [settings setValue:[NSNumber numberWithInt:12800] forKey:AVEncoderBitRateKey]; [settings setValue:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey]; result = [NSDictionary dictionaryWithDictionary:settings]; return result; } -(void)play{ AVAudioSession *audioSession = [AVAudioSession sharedInstance]; [audioSession setCategory:AVAudioSessionCategoryPlayback error:nil]; [audioSession setActive:YES error:nil]; NSError *playBackError = nil; NSError *readingError = nil; NSString *audioPath = [self audioRecordingPath]; // NSString *audioPath = [[NSBundle mainBundle]pathForResource:@"Love" ofType:@"mp3"]; NSLog(@"path:%@",audioPath); NSURL *url = [NSURL URLWithString:audioPath]; NSData *fileData = [NSData dataWithContentsOfFile:audioPath options:NSDataReadingMapped error:&readingError]; self.audioPlayer = [[AVAudioPlayer alloc]initWithData:fileData error:&playBackError]; if (self.audioPlayer != nil) { NSLog(@"finishi3"); self.audioPlayer.delegate = self; self.audioPlayer.volume = 50.0; if ([self.audioPlayer prepareToPlay]) { NSLog(@"finishi4"); UInt32 doChangeDefaultRoute = 1; AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryDefaultToSpeaker, sizeof(doChangeDefaultRoute), &doChangeDefaultRoute); [self.audioPlayer play]; } }else{ NSLog(@"error:%@",[playBackError description]); } }
解决方案
我也是菜鸟!所以只能给你个链接,你自己看看吧!我觉得写的挺好的,希望对你有帮助!http://www.cnblogs.com/kenshincui/p/4186022.html
时间: 2024-08-31 14:21:40