///沙盒路径+ (NSString *)pathDocument{    NSFileManager *fileManager = [[NSFileManager alloc]init];    NSString *pathDocuments = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0];    NSString *voiceDirectory = [pathDocuments stringByAppendingPathComponent:@"文件夹名"];    ///判断是否有该文件夹    if (![fileManager fileExistsAtPath:voiceDirectory]) {        ///如果没有就新建该文件夹        NSError *error = nil;        [fileManager createDirectoryAtPath:voiceDirectory withIntermediateDirectories:YES attributes:nil error:&error];        if (!error) {            return nil;        }    }    return voiceDirectory;}