iphone - 将音频文件录制为 mp3 或 wav

Question

我正在尝试录制和保存 mp3 文件，所以我使用以下代码

NSString* d = @" ar/mobile/Applications/86F15C5E-66EC-4071-95EB-96CDE64B5948/Library/Application Support/P/5720/5720/Report/Report0.mp3"

NSURL *soundFileURL = [NSURL fileURLWithPath:d];

 NSDictionary *recordSettings = [NSDictionary 
                                 dictionaryWithObjectsAndKeys:
                                 [NSNumber numberWithInt:AVAudioQualityMin],
                                 AVEncoderAudioQualityKey,
                                 [NSNumber numberWithInt:16], 
                                 AVEncoderBitRateKey,
                                 [NSNumber numberWithInt: 2], 
                                 AVNumberOfChannelsKey,
                                 [NSNumber numberWithFloat:44100.0], 
                                 AVSampleRateKey,
                                 nil];

 NSError *error = nil;

 audioRecorder = [[AVAudioRecorder alloc]
                  initWithURL:soundFileURL
                  settings:recordSettings
                  error:&error];

 if (error)
 {
     NSLog(@"error: %@", [error localizedDescription]);

 } else {
     [audioRecorder prepareToRecord];
 }

开始记录我使用

[audioRecorder record];

对于 mp3 我有错误 错误:操作无法完成。 (操作系统状态错误 1718449215。)

如果我把它保存为wav，什么都不记录，文件是0字节

我是不是遗漏了什么，知道如何解决吗

Answer 1

你没有展示 Dpath 的定义方式......

NSString * filePath = [NSHomeDirectory()stringByAppendingPathComponent: [NSString stringWithFormat:@"Documents/%@.mp3",songTitle]];

// more code    

recorder = [[AVAudioRecorder alloc] initWithURL: [NSURL fileURLWithPath:filePath settings: recordSettings error: nil];