发送高清语音

技术指南 iOS
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1、设置语音录制参数

NSDictionary *recordSettings =  @{        
                                    AVFormatIDKey : @(kAudioFormatMPEG4AAC_HE),
                                    AVNumberOfChannelsKey : @1,        
                                    AVEncoderBitRateKey : @(32000)   
                                 };

2、生成临时语音存放路径

  NSURL *recordTempFileURL = [NSURL fileURLWithPath:[NSTemporaryDirectory() 
                                          stringByAppendingPathComponent:@"HQTempAC.m4a"]];

3、录制高清语音消息

  AVAudioSession *audioSession = [AVAudioSession sharedInstance];   
   
  [audioSession setCategory:AVAudioSessionCategoryRecord error:nil];   
  
  [audioSession setActive:YES error:nil];    
  
  NSError *error = nil;    
  if (nil == self.recorder) {        
      AVAudioRecorder *recorder = [[AVAudioRecorder alloc] initWithURL:recordTempFileURL 
                                                              settings:recordSettings error:&error];  
                   
      recorder.delegate = self;      
      recorder.meteringEnabled = YES;    
   }
   
  // 准备录音   
  [recorder prepareToRecord];    
  // 开始录音   
  [recorder record];

4、 录制完成后发布语音消息

 if (!recorder.url){ return;}
 
 NSURL *url = [[NSURL alloc] initWithString:recorder.url.absoluteString]; 
    
 // 当前录音时长    
 NSTimeInterval audioLength = recorder.currentTime;    
 
 // 停止录音    
 [recorder stop];    
 
 // 录音文件 data    
 NSData *currentRecordData = [NSData dataWithContentsOfURL:url];    
 
 recorder = nil;    
 
 // 将语音从临时路径放到永久路径。    
 NSString *path = [self getHQVoiceMessageCachePath];    
 
 [currentRecordData writeToFile:path atomically:YES];    
 
 // 构造高清语音消息    
 RCHQVoiceMessage *hqVoiceMsg = [RCHQVoiceMessage messageWithPath:path duration:audioLength];
 
 // 发送消息    
 RCMessage *message = [[RCMessage alloc] initWithType:ConversationType_PRIVATE targetId:@"2" 
                                            direction:MessageDirection_SEND content:hqVoiceMsg]; 
                                            
 [[RCIMClient sharedRCIMClient] sendMediaMessage:message pushContent:nil pushData:nil 
                                        progress:^(int progress, RCMessage *progressMessage){}
                                    successBlock:^(RCMessage *successMessage) 
                                    {        
                                        NSLog(@"--- 发送消息成功");    
                                    } 
                                    errorBlock:^(RCErrorCode nErrorCode, RCMessage *errorMessage) 
                                    {        
                                        NSLog(@"--- 发送消息失败 %ld", nErrorCode);  
                                    } cancel:^(RCMessage *cancelMessage) {}];
                                    
 // 语音消息本地路径
 - (NSString *)getHQVoiceMessageCachePath {   
     
      long long currentTime = [[NSDate date] timeIntervalSince1970] * 1000;
      
      //路径
      NSString *path = [RCUtilities rongImageCacheDirectory];   
      
      path = [path stringByAppendingFormat:@"/%@/RCHQVoiceCache", [RCIMClient sharedRCIMClient].currentUserInfo.userId]; 
      
      if ([[NSFileManager defaultManager] fileExistsAtPath:path] == NO) {   
      
           [[NSFileManager defaultManager] createDirectoryAtPath:path  
                                     withIntermediateDirectories:YES 
                                                      attributes:nil                                                    
                                                          error:nil];   
       }
   
       NSString *fileName = [NSString stringWithFormat:@"/Voice_%@.m4a", @(currentTime)];  
     
       path = [path stringByAppendingPathComponent:fileName];   
       
       NSLog(@"--- path %@", path);    
       
       
    return path;
}