/**
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;
}
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