以上的代码能用OC写吗?
时间: 2024-03-12 18:43:55 浏览: 21
当然可以,以下是 Objective-C 版本的代码实现:
1. 在 info.plist 文件中添加蓝牙权限:
- NSBluetoothPeripheralUsageDescription:描述了应用程序需要使用蓝牙的原因。
- NSMicrophoneUsageDescription:描述了应用程序需要使用麦克风的原因。
2. 创建一个 AVAudioSession 实例并设置它的类别为 AVAudioSessionCategoryRecord:
```
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *error;
BOOL success = [audioSession setCategory:AVAudioSessionCategoryRecord error:&error];
if (!success) {
NSLog(@"Failed to set audio session category: %@", error.localizedDescription);
}
```
3. 设置 AVAudioSession 实例的输入源和输出源:
```
NSArray<AVAudioSessionPortDescription *> *bluetoothInputs = [audioSession.availableInputs
filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(AVAudioSessionPortDescription * _Nullable input, NSDictionary<NSString *,id> * _Nullable bindings) {
return input.portType == AVAudioSessionPortBluetoothHFP || input.portType == AVAudioSessionPortBluetoothA2DP;
}]];
if (bluetoothInputs.count > 0) {
NSError *error;
success = [audioSession setPreferredInput:bluetoothInputs.firstObject error:&error];
if (!success) {
NSLog(@"Failed to set preferred input: %@", error.localizedDescription);
}
}
AVAudioSessionPortDescription *currentOutput = audioSession.currentRoute.outputs.firstObject;
success = [audioSession setPreferredOutput:currentOutput error:&error];
if (!success) {
NSLog(@"Failed to set preferred output: %@", error.localizedDescription);
}
```
4. 初始化 AVAudioRecorder 对象并开始录音:
```
NSURL *audioURL = // Specify the URL where you want to save the recorded audio.
NSDictionary *audioSettings = @{AVFormatIDKey: @(kAudioFormatMPEG4AAC),
AVSampleRateKey: @(44100),
AVNumberOfChannelsKey: @(2)};
NSError *error;
AVAudioRecorder *audioRecorder = [[AVAudioRecorder alloc] initWithURL:audioURL settings:audioSettings error:&error];
if (!audioRecorder) {
NSLog(@"Failed to initialize audio recorder: %@", error.localizedDescription);
} else {
[audioRecorder prepareToRecord];
[audioRecorder record];
}
```
这样就可以从蓝牙设备的麦克风录制音频了。希望对您有所帮助!