將音頻文件比如mp3、caf等音頻文件制作為鈴聲，但是庫(kù)樂(lè)隊(duì)app需要文件.band的格式才能打開(kāi)

ExtAudioConverter 講音頻轉(zhuǎn)換成.aiff格式//生成新的BandFilePath

- (NSString*)generateBandFile:(NSString*)filePath{

? ? NSFileManager *fileManager = [NSFileManager defaultManager];

? ? NSString *fileName = [[filePath lastPathComponent] stringByDeletingPathExtension];

? ? NSString* cachePath=[NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES) objectAtIndex:0];

? ? NSString*tmpBandDir = [cachePathstringByAppendingPathComponent:fileName];

? ? if([fileManagerfileExistsAtPath:tmpBandDir]) {

? ? ? ? [fileManagerremoveItemAtPath:tmpBandDirerror:nil];

? ? }

? ? NSString *bandFilePath = [[NSBundle mainBundle] pathForResource:

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? @"bandName"ofType:@"band"];

? ? if([fileManagerfileExistsAtPath:bandFilePath]){

? ? ? ? [fileManagercopyItemAtPath:bandFilePathtoPath:tmpBandDirerror:nil];

? ? }

? ? NSString *ringtonefile = [tmpBandDir stringByAppendingPathComponent:@"Media/ringtone.aiff"];

? ? ExtAudioConverter* converter = [[ExtAudioConverter alloc] init];

? ? converter.inputFile= filePath;

? ? converter.outputFile= ringtonefile;

? ? converter.outputFileType = kAudioFileAIFFType;

? ? if([converterconvert]) {

? ? ? ? NSLog(@"轉(zhuǎn)化成功");

? ? }

? ? NSString *bandDir = [tmpBandDir stringByAppendingString:@".band"];

? ? [fileManagermoveItemAtPath:tmpBandDirtoPath:bandDirerror:nil];

? ? returnbandDir;

}