每次重建应用程序时都会删除AVRecorder文件 - iOS

Question

我有一个使用AVAudioRecorder进行录制的应用程序。它的工作原理和保存音频文件就好了。但是当我重建应用程序时，音频文件将被删除。

这是正常的吗？我会这么想的，但只是想确定一下。我在网上找不到任何相关信息。每次进行新的构建时，Xcode是否会删除应用程序生成的任何新文件？

更新 我用来录制音频的代码如下：

    // Setup audio recorder to save file.
    AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];
    [audioSession setActive:YES error:nil];
    [audio_recorder setDelegate:self];

    // Set the recording options such as quality.
    NSMutableDictionary *settings = [NSMutableDictionary dictionary];
    [settings setValue:[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
    [settings setValue:[NSNumber numberWithFloat:8000.0] 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];
    [settings setValue:[NSNumber numberWithInt:AVAudioQualityMax] forKey:AVEncoderAudioQualityKey];

    NSArray *searchPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentPath_ = [searchPaths objectAtIndex:0];
    NSString *pathToSave = [documentPath_ stringByAppendingPathComponent:currentDate];

    // Construct the audio file save URL.
    NSURL *url = [NSURL fileURLWithPath:pathToSave];

    // Setup the audio recorder.
    NSError *error;
    audio_recorder = [[AVAudioRecorder alloc] initWithURL:url settings:settings error:&error];

    if (error == nil) {

        // Now begin the recording.
        [audio_recorder prepareToRecord];
        [audio_recorder record];
   }

谢谢你的时间，Dan。