获取本地音乐的大小

/**

 获取本地音乐的大小

 */

+ (float)dM_VideoManager_getMusicSizeFile:(NSString*)file{

    NSFileManager *fm = [NSFileManager defaultManager];

    NSDictionary *dictAtt = [fm attributesOfItemAtPath:[DM_YCUtils dm_getVideoFileInFile:file] error:nil];

    floatsize = [[dictAttobjectForKey:@"NSFileSize"]floatValue]/1024.0;

    returnsize;

}