-(void)testClick{
    [_recorder record];
    [self performSelector:@selector(stopRecorder) withObject:nil afterDelay:15];
}
-(void)stopRecorder{
    [_recorder stop];
//    NSString* path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).lastObject stringByAppendingPathComponent:@"tmp/aaa"];
//    NSURL* url = [NSURL fileURLWithPath:path];
//    NSData *data = [NSData dataWithContentsOfURL:url];
//    [data writeToFile:[NSTemporaryDirectory() stringByAppendingPathComponent:@"tmp/aaa"] atomically:YES];
    NSLog(@"voicerecorder stop");
    
}
-(void)configRecorder{
    //設定音訊會話
    NSError *sessionError;
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryRecord error:&sessionError];
    if (sessionError){
        NSLog(@"Error creating session: %@",[sessionError description]);
        
    }else{
        [[AVAudioSession sharedInstance] setActive:YES error:&sessionError];
        
    }
    NSError *error = nil;
    
    NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc]init];
    [recordSetting setObject:[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
    [recordSetting setObject:[NSNumber numberWithFloat:22050] forKey:AVSampleRateKey];
    [recordSetting setObject:[NSNumber numberWithInt:2] forKey:AVNumberOfChannelsKey];
    [recordSetting setObject:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
    //是否使用浮點數取樣
    [recordSetting setObject:@(YES) forKey:AVLinearPCMIsFloatKey];
    [recordSetting setObject:[NSNumber numberWithInt:AVAudioQualityHigh] forKey:AVEncoderAudioQualityKey];
    NSString* path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).lastObject stringByAppendingPathComponent:@"aaa.wav"];
    NSURL* url = [NSURL fileURLWithPath:path];
    _recorder = [[AVAudioRecorder alloc] initWithURL:url settings:recordSetting error:nil];
    _recorder.meteringEnabled = YES;
    [_recorder prepareToRecord];
}
 

溫馨提示：AVFormatIDKey 涉及到編碼方式，又幾十種列舉值，經他人試過幾種後，kAudioFormatLinearPCM會編碼成wav編碼格式，這種格式蘋果和安卓都可以直接播放，親測

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