#Part 3 :语音播放器
Part 2 中的录音机录制完成,并把amr文件的data通过服务器发送给对方,对方收到后无法直接使用这个data进行播放,需要转换成wav格式data.
与part 2相同,也创建两个音频文件到沙盒的Tmp文件夹中
NSString *wavPlayerFilePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"WAVtemporaryPlayer.wav"];NSString *amrPlayerFilePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"AMRtemporaryPlayer.amr"];复制代码
转换amr格式data,成为wav格式data
- (NSData *)conversionAMRDataToWAVData:(NSData *)amrData{NSString *wavPlayerFilePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"WAVtemporaryPlayer.wav"];NSString *amrPlayerFilePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"AMRtemporaryPlayer.amr"];//amr的data写入文件[amrData writeToFile:amrPlayerFilePath atomically:YES];//将AMR文件转码成WAVE文件amr_file_to_wave_file([amrPlayerFilePath cStringUsingEncoding:NSUTF8StringEncoding],[wavPlayerFilePath cStringUsingEncoding:NSUTF8StringEncoding]);//得到转码后wav的datareturn [NSData dataWithContentsOfFile:wavPlayerFilePath];}复制代码
使用initWithData:(NSData *)data error:(NSError **)outError方法初始化播放器
self.audioPlayer = [[AVAudioPlayer alloc]initWithData:[self conversionAMRDataToWAVData:data] error:nil];self.audioPlayer.meteringEnabled = YES;self.audioPlayer.delegate = self;self.audioPlayer.volume = 1.0;self.audioPlayer.numberOfLoops = 0;[self.audioPlayer prepareToPlay];[self.audioPlayer play];复制代码
播放完成代理方法中做一些事情
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{if (flag) {//播放完成[self stopPlaying];if (self.finished) {self.finished();}}} 复制代码
开启关闭红外传感器,当耳朵贴近屏幕时用听筒播放,当离开是用扬声器播放
//监听红外传感器改变通知[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(proximityStateDidChange) name:UIDeviceProximityStateDidChangeNotification object:nil];//开始播放时开启红外传感器[[UIDevice currentDevice] setProximityMonitoringEnabled:NO];//结束播放时关闭红外传感器[UIDevice currentDevice].proximityMonitoringEnabled = YES;- (void)proximityStateDidChange{if ([UIDevice currentDevice].proximityState) {NSLog(@"有物品靠近");[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];} else {NSLog(@"有物品离开");[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];}}复制代码
Demo 地址 :/XL-Andrew/C…
