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Files & Directories

 
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Ike
Kapetan


Joined: 17 Jun 2006
Posts: 3026
Location: Europe

PostPosted: Mon Dec 07, 2009 7:23 pm    Post subject: Files & Directories Reply with quote

MF - Tracking File system changes

"In my cocoa application ,I m trying to track all filesystem changes like copy,
create and renaming or deletion of file and folder."
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delovski



Joined: 14 Jun 2006
Posts: 3522
Location: Zagreb

PostPosted: Sat Mar 13, 2010 11:49 pm    Post subject: Reply with quote

so - Where’s the iPhone MIME type database?

"Basically, you give it a filename, and it uses the path extension to return
the file's MIME type..."
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delovski



Joined: 14 Jun 2006
Posts: 3522
Location: Zagreb

PostPosted: Thu Mar 25, 2010 12:09 am    Post subject: Reply with quote

Jeff LaMarche - Absolute Filenames

"The full pathname to an item in the Documents directory of an application's
sandbox includes not the name of the application, but a UUID (unique ident-
ifier) instead. When you build and run your application, a new UUID is calcu-
lated if, and only if, something has changed since your last build. If you ha-
ven't made any changes, it keeps running with the previous UUID. Once you
make some changes to code or a resource and re-compile, the UUID chan-
ges, and the stored absolute path no longer points to the right location."
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delovski



Joined: 14 Jun 2006
Posts: 3522
Location: Zagreb

PostPosted: Tue Apr 20, 2010 8:53 pm    Post subject: Reply with quote

iCodeBlog - Creating a document centric iPhone/iPad application
with own file format using ZipArchive


"If you look at the most of the Apple’s productivity applications you’ll noti-
ce they all use bundles as their output format. ... I am going to be doing
the same today by making my example application create different text
and image files and then zip them together in a single file – this way the
user could then copy this single file over trough iTunes via the file sharing
feature."
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delovski



Joined: 14 Jun 2006
Posts: 3522
Location: Zagreb

PostPosted: Tue May 04, 2010 1:21 am    Post subject: Reply with quote

SO - iPhone write to file (alternative directory)

"New to iPhone 3.2, Apple introduced File-Sharing support."
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delovski



Joined: 14 Jun 2006
Posts: 3522
Location: Zagreb

PostPosted: Sat Feb 26, 2011 4:36 pm    Post subject: Reply with quote

mf - getResourceValue + NSURLIsDirectoryKey fail

"You need to use the path-based NSFileManager APIs. Get the attributes of
the item and check the NSFileType attribute for if it's equal to NSFileType-
Directory."
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delovski



Joined: 14 Jun 2006
Posts: 3522
Location: Zagreb

PostPosted: Fri Oct 14, 2011 7:56 am    Post subject: Reply with quote

http://www.marco.org/2011/10/13/ios5-caches-cleaning
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Ike
Kapetan


Joined: 17 Jun 2006
Posts: 3026
Location: Europe

PostPosted: Mon Jul 16, 2012 1:58 am    Post subject: Reply with quote

so - How to detect total available/free disk space on the iPhone/iPad device?

"It returns me exactly the size that iTunes displays when device is connected
to machine."
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Ike
Kapetan


Joined: 17 Jun 2006
Posts: 3026
Location: Europe

PostPosted: Thu Apr 01, 2021 8:55 pm    Post subject: Reply with quote

so - How can I retrieve read/write disk info?

"You can take a look at XRG, which is an activity monitor for OSX. The whole
disk statistics grabber is in XRGDiskView.m, in the getDISKcounters function.

To sum it up, you get a list of hardrives using the following code..."
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Ike
Kapetan


Joined: 17 Jun 2006
Posts: 3026
Location: Europe

PostPosted: Tue Dec 19, 2023 8:29 pm    Post subject: Reply with quote

adc - Technical Q&A NW09 - Testing for a Network Volume

"... you should use NSURL for this. Construct a URL for any item on
the volume and then call -getResourceValue:forKey:error: to get the
NSURLVolumeIsLocalKey key;"


"... you can use the NSURLVolumeSupportsAdvisoryFileLockingKey key
to determine whether a volume supports advisory locking"
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Ike
Kapetan


Joined: 17 Jun 2006
Posts: 3026
Location: Europe

PostPosted: Tue Dec 19, 2023 8:33 pm    Post subject: Reply with quote

Code:
      // If you're working on general application code, you should use NSURL for this.
      // Construct a URL for any item on the volume and then call -getResourceValue:forKey:error: to get the NSURLVolumeIsLocalKey key;
      // the returned value will be false (kCFBooleanFalse) for a network volume and true (kCFBooleanTrue) for a local volume.
     
      NSURL  *url = (NSURL *)urlRef;
      id      value = nil;
      BOOL    ok = [url getResourceValue:&value forKey:NSURLVolumeIsLocalKey error:nil];
     
      if (ok)
         NSLog (@"Volume: %@ has this value: %@\n", url, value);
     
      ok = [url getResourceValue:&value forKey:NSURLVolumeSupportsAdvisoryFileLockingKey error:nil];
      if (ok)
         NSLog (@"Volume: %@ has this value: %@\n", url, value);
     
      CFRelease (urlRef);
     
      if (FSRefMakePath(parentFSRef, (UInt8 *)fullPath, PATH_MAX))
         fullPath[0] = '\0';
     
      if (!FSGetCatalogInfo(parentFSRef, kFSCatInfoVolume, &catalogInfo, NULL, NULL, NULL))  {
         if (id_SupportsExclusiveFileAccess (catalogInfo.volume))
            NSLog (@"Volume: %hd supports file locking - YES!\n", catalogInfo.volume);
         else
            NSLog (@"Volume: %hd DOES NOT support file locking\n", catalogInfo.volume);

         if (FSGetVolumeParms(catalogInfo.volume, &volParmsInfo, sizeof(GetVolParmsInfoBuffer)) == noErr) {
            if (volParmsInfo.vMServerAdr)
               NSLog(@"The volume has serverAddr.");
            if (volParmsInfo.vMExtendedAttributes & (1 << bIsEjectable))  {  // vMAttrib or vMExtendedAttributes (bSupportsExclusiveLocks)
               NSLog(@"The volume is a shared volume.");
            } else {
               NSLog(@"The volume is not a shared volume.");
            }
         }
      }
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Ike
Kapetan


Joined: 17 Jun 2006
Posts: 3026
Location: Europe

PostPosted: Thu Mar 21, 2024 9:51 am    Post subject: Reply with quote

so - iPhone: How to copy a file from resources to documents?

Code:
BOOL success = [fileManager copyItemAtPath:defaultDBPath toPath:writableDBPath error:&error];

Code:

NSFileManager *fmngr = [[NSFileManager alloc] init];
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"mydb.sqlite" ofType:nil];
NSError *error;
if(![fmngr copyItemAtPath:filePath toPath:[NSString stringWithFormat:@"%@/Documents/mydb.sqlite", NSHomeDirectory()] error:&error]) {
     // handle the error
     NSLog(@"Error creating the database: %@", [error description]);

}
[fmngr release];
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