CFURLSetResourcePropertyForKey failed because it was passed this URL which has no scheme

     用上篇文章中的方法，讓文件不備份到iCloud中出現CFURLSetResourcePropertyForKey failed because it was passed this URL which has no scheme錯誤

　　錯誤原因：

　　因為(BOOL)addSkipBackupAttributeToItemAtURL:(NSURL *)fileURL，傳過來的fileURL格式為

 NSURL *fileURL =[NSURL URLWithString:localFilePath]; 

　 改為以下即可
　 NSURL *fileURL =[NSURL fileURLWithPath:localFilePath];