我为 iPhone 创建了一个测试应用程序。我写了以下代码来记录。但它不起作用。
-(IBAction)start:(id)sender{
recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue:[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
[recordSetting setValue:[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey];
[recordSetting setValue:[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
soundsDirectoryPath = [documentsDirectory stringByAppendingPathComponent:@"Sounds"];
[[NSFileManager defaultManager] createFileAtPath:[NSString stringWithFormat:@"%@/Test.caf", soundsDirectoryPath] contents:nil attributes:nil];
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/Test.caf", soundsDirectoryPath]];
NSError *err = nil;
if([recorder isRecording])
{
[recorder stop];
recorder = nil;
}
recorder = [[ AVAudioRecorder alloc] initWithURL:url settings:recordSetting error:&err];
[recorder setDelegate:self];
recorder.meteringEnabled = YES;
if(err){
NSLog(@"Error : %@", [err description]);
}
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
BOOL audioHWAvailable = audioSession.inputIsAvailable;
if (! audioHWAvailable) {
UIAlertView *cantRecordAlert =
[[UIAlertView alloc] initWithTitle: @"Warning"
message: @"Audio input hardware not available"
delegate: nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[cantRecordAlert show];
[cantRecordAlert release];
return;
}
BOOL st = [recorder prepareToRecord];
if(!st){
NSLog(@"Failed");
}
recorder.meteringEnabled = YES;
BOOL status = [recorder record];
if(!status)
NSLog(@"Failed");
}
-(IBAction)stop:(id)sender{
if([recorder isRecording]){
NSLog(@"Recording...");
}else{
NSLog(@"Not recording...");
}
[recorder stop];
}
当我调用“start”方法时,在调用“prepareToRecord”和“record”方法后打印“Failed”。
当我调用“停止”方法时,它正在打印“未录制...”消息。
我在这段代码中犯了什么错误。
谢谢。