CFURLSetResourcePropertyForKey failed when disable data backup on NSDocumentDirectory

Question

I am trying to download image files and store in NSDocumentDirectory. In order to do so, I has to turn off data backup on iCloud and iTunes. Below are my codes:

+(void)saveData:(NSData*)thedata:(NSString*)fileName
{
   NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
   NSString *documentsDirectory = [paths objectAtIndex:0];
   NSString *localFilePath = [documentsDirectory stringByAppendingPathComponent:fileName];
   NSFileManager *fileManager = [NSFileManager defaultManager];
   [fileManager createFileAtPath:localFilePath contents:thedata attributes:nil];
   //prevent files from backup on iCloud or iTune
   NSURL *fileURL = [NSURL URLWithString:localFilePath];
   [self addSkipBackupAttributeToItemAtURL:fileURL];
}

and for my addskipbackupattributetoitematurl:

+(BOOL)addSkipBackupAttributeToItemAtURL:(NSURL *)fileURL
{
   if (![[NSFileManager defaultManager] fileExistsAtPath:[fileURL path]])
   {
       NSLog(@"File %@ doesn't exist!",[fileURL path]);
       return NO;
   }
   NSString *currSysVer = [[UIDevice currentDevice] systemVersion];    
   if ([currSysVer isEqualToString:@"5.0.1"])
   {
       const char* filePath = [[fileURL path] fileSystemRepresentation];
       const char* attrName = "com.apple.MobileBackup";
       u_int8_t attrValue = 1;
       int result = setxattr(filePath, attrName, &attrValue, sizeof(attrValue), 0, 0);
       NSLog(@"Excluded '%@' from backup",fileURL);
       return result == 0;
   }
   else if (&NSURLIsExcludedFromBackupKey)
   {
       NSError *error = nil;
       BOOL result = [fileURL setResourceValue:[NSNumber numberWithBool:YES] forKey:NSURLIsExcludedFromBackupKey error:&error];
       if (result == NO)
       {
           NSLog(@"Error excluding '%@' from backup. Error: %@",fileURL, error);
           return NO;
       }
       else
       { 
           NSLog(@"Excluded '%@' from backup",fileURL);
           return YES;
       }
   }
   else
   {
       return YES;
   }
}

However, the BOOL result = [fileURL setResourceValue:[NSNumber numberWithBool:YES] forKey:NSURLIsExcludedFromBackupKey error:&error]; created the following message

CFURLSetResourcePropertyForKey failed because it was passed this URL which has no scheme: /var/mobile/Applications/CF69D567-1D37-4053-BFA8-5D0FCBD9C2B2/Documents/coffee.jpg

I'm just wondering if any encountered this problem??

Hell with apple... they don't even return an error on this and the result will be YES. But this will not set the "ExcludedFromBackupKey". They rejected me twice for this :( — Nikita P, Feb 04 '15 at 07:18

score 135 · Accepted Answer · answered Oct 17 '12 at 12:40

135

Solved. once I changed

NSURL *fileURL = [NSURL URLWithString:localFilePath];

to

NSURL *fileURL = [NSURL fileURLWithPath:localFilePath];

everything work perfectly.

answered Oct 17 '12 at 12:40

hook38

3,899
4
32
52

score 0 · Answer 2 · answered Sep 12 '17 at 09:17

0

Swift:

let fileURL = URL(fileURLWithPath: somepath)

answered Sep 12 '17 at 09:17

Hemang

26,840
19
119
186

Pistol Felix · Answer 3 · 2023-09-02T17:03:07.970

-1

The designated method for creating a local file's url is : NSURL * __url = [[NSURL alloc] initFileURLWithPath:__path isDirectory:NO]; It works perfectly. Good luck!

edited Sep 02 '23 at 17:03

answered Aug 29 '23 at 05:36

Pistol Felix

13
2

If you have a new question, please ask it by clicking the [Ask Question](https://stackoverflow.com/questions/ask) button. Include a link to this question if it helps provide context. - [From Review](/review/late-answers/34913688) – Ben A. Aug 30 '23 at 17:18

CFURLSetResourcePropertyForKey failed when disable data backup on NSDocumentDirectory

3 Answers3

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