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

     用上篇文章中的方法，让文件不备份到iCloud中出现CFURLSetResourcePropertyForKey failed because it was passed this URL which has no scheme错误

　　错误原因：

　　因为(BOOL)addSkipBackupAttributeToItemAtURL:(NSURL *)fileURL，传过来的fileURL格式为

 NSURL *fileURL =[NSURL URLWithString:localFilePath]; 

　 改为以下即可
　 NSURL *fileURL =[NSURL fileURLWithPath:localFilePath];