Question

我正在使用AVAudioRecorder在我的iOS应用程序中录制内容，我希望以字节为单位获取录制文件的大小。我有办法做到吗？

这是我设置录像机的代码：

NSArray *pathComponents = [NSArray arrayWithObjects:
                               [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject],
                               @"MyAudioMemo.m4a",
                               nil];
    outputFileURL = [NSURL fileURLWithPathComponents:pathComponents];

    // Setup audio session
    AVAudioSession *session = [AVAudioSession sharedInstance];
    [session setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];

    // Define the recorder setting
    NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc] init];

    [recordSetting setValue:[NSNumber numberWithInt:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey];
    [recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
    [recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];

    // Initiate and prepare the recorder
    recorder = [[AVAudioRecorder alloc] initWithURL:outputFileURL settings:recordSetting error:nil];
    recorder.delegate = self;
    recorder.meteringEnabled = YES;
    [recorder prepareToRecord];

这是我尝试获取文件大小的地方：

- (void) audioRecorderDidFinishRecording:(AVAudioRecorder *)avrecorder successfully:(BOOL)flag{
    // Convert to NSData
    NSData *data = [NSData dataWithContentsOfFile:recorder.url];
    // Convert to NSString
    NSString* dataAsString = [NSString stringWithUTF8String:[data bytes]];
NSLog(@"Size: %@", dataAsString);
}

NSLog不会返回任何内容。任何帮助表示赞赏。

Answer 1

好的，所以我想通了，你可以通过这样做来获得文件大小：

unsigned long long size = [[NSFileManager defaultManager] attributesOfItemAtPath:[recorder.url path] error:nil].fileSize;

然后通过执行以下操作将其转换为字符串：

NSLog(@"This is the file size of the recording in bytes: %llu", size);

录音获取文件大小

1 个答案: