I am trying to create two log files and replace content in the second file with the content in the first file.
My code for creating log in AppDelegate
NSArray *paths3 = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory3 = [paths3 objectAtIndex:0];
logPath3 = [documentsDirectory3 stringByAppendingPathComponent:#"console4.log"];
if(![[NSFileManager defaultManager] fileExistsAtPath:logPath3])
[[NSFileManager defaultManager] createFileAtPath:logPath3 contents:[NSData data] attributes:nil];
NSLog(#"path %#",logPath3);
freopen([logPath3 cStringUsingEncoding:NSASCIIStringEncoding],"a+",stderr);
NSArray *paths2 = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory2 = [paths2 objectAtIndex:0];
logPath2 = [documentsDirectory2 stringByAppendingPathComponent:#"console3.log"];
if(![[NSFileManager defaultManager] fileExistsAtPath:logPath2])
[[NSFileManager defaultManager] createFileAtPath:logPath2 contents:[NSData data] attributes:nil];
NSLog(#"path %#",logPath2);
freopen([logPath2 cStringUsingEncoding:NSASCIIStringEncoding],"a+",stderr);
_isFileOneCreated =YES;
code to move content
NSFileManager *filemgr;
filemgr = [NSFileManager defaultManager];
NSError * err;
if ([filemgr moveItemAtPath:
logPath2 toPath:
logPath3 error: &err])
NSLog (#"Day 3 Move successful");
else
NSLog (#"Day 3 Move failed %#",[err localizedDescription]);
But i get an error 516.
(Cocoa error 516.)" UserInfo=0x16dba220 {NSSourceFilePathErrorKey=/var/mobile/Containers/Data/Application/274E9843-2C8E-45F3-BD41-EA392F50C7AC/Documents/console3.log, NSUserStringVariant=(
Move
), NSFilePath=/var/mobile/Containers/Data/Application/274E9843-2C8E-45F3-BD41-EA392F50C7AC/Documents/console3.log, NSDestinationFilePath=/var/mobile/Containers/Data/Application/274E9843-2C8E-45F3-BD41-EA392F50C7AC/Documents/console4.log, NSUnderlyingError=0x16da63f0 "The operation couldn’t be completed. File exists"}
Help me solve my issue
moveItemAtPath does not allow you to overwrite the file with same name. See this Question Thread.
All you need to do is delete the file at target location before you overwrite with new one. Use the below code. This will do the trick but i advice you to take precaution to have the backup of your file just in case move doesn't work for some unknown reason.
NSFileManager *filemgr = [NSFileManager defaultManager];
NSError * err;
[filemgr removeItemAtPath:logPath3 error:&err];
if ([filemgr moveItemAtPath:logPath3 toPath:logPath2 error: &err])
NSLog (#"Day 3 Move successful");
else
NSLog (#"Day 3 Move failed %#",[err localizedDescription]);
Related
I have a sqlite file that I am trying to store in Application Support Folder. I am using the following code to create the directory.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
NSString *applicationSupportDirectory = [paths firstObject];
NSError *err;
NSString *dataPath = [applicationSupportDirectory stringByAppendingPathComponent:#"/Email"];
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
[[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&err]; //Create folder
NSString *dataBasePath = [applicationSupportDirectory stringByAppendingString:#"/Email/Email.sqlite"];
This is the printed result when I NSLog dataBasePath
/var/mobile/Containers/Data/Application/8A40E5A9-EEE6-46EF-B71F-36C9A00D5996/Library/Application
Support/Email/Email.sqlite
Is this correct way of creating the directory to store my sql file in Application Support? I have to use Application Support so the user can't mess with it (I use file share so document directory is out of the question) and the OS shouldn't be able to mess with it either. I just need to be sure
It's close but not quite right. Don't put the / before Email. You want to pass YES to withIntermediateDirectories. And the final path should use dataPath and stringByAppendingPathComponent.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
NSString *applicationSupportDirectory = [paths firstObject];
NSString *dataPath = [applicationSupportDirectory stringByAppendingPathComponent:#"Email"];
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath]) {
NSError *err;
if (![[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:YES attributes:nil error:&err]) { //Create folder
NSLog(#"Unable to create folder at %#: %#", dataPath, err);
}
}
NSString *dataBasePath = [dataPath stringByAppendingPathComponent:#"Email.sqlite"];
I am trying to release cache from files by calling this method :
-(void)removeCacheFromFiles
{
NSFileManager *filemgr;
filemgr = [NSFileManager defaultManager];
NSError *error=nil;
if ([filemgr removeItemAtPath: [NSHomeDirectory() stringByAppendingString:#"/Library/Caches"] error: &error] == YES)
NSLog (#"Remove successful");
else
NSLog (#"Remove failed");
NSLog(#"error %#",error);
[filemgr createDirectoryAtPath: [NSHomeDirectory() stringByAppendingString:#"/Library/Caches"] withIntermediateDirectories:NO attributes:nil error:nil];
}
But I get "Remove failed" every time.
I tried this as well and get the same result:
-(void)removeCacheFromFiles
{
NSFileManager *filemgr;
filemgr = [NSFileManager defaultManager];
NSArray *cachePathList = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cachePath = [cachePathList objectAtIndex:0];
NSError *error=nil;
if ([filemgr removeItemAtPath:cachePath error: &error] == YES)
NSLog (#"Remove successful");
else
NSLog (#"Remove failed");
NSLog(#"error %#");
[filemgr createDirectoryAtPath: [NSHomeDirectory() stringByAppendingString:#"/Library/Caches"] withIntermediateDirectories:NO attributes:nil error:nil];
}
Also where should this remove caching be down ? Is it a good practise to call it in ViewDidDisappear or in ViewDidAppear so that the cache is cleared when the view controller is called the second time ?
The error in the NSLog says :
error Error Domain=NSCocoaErrorDomain Code=513 "“Caches” couldn’t be removed because you don’t have permission to access it." UserInfo={NSUnderlyingError=0x15fac9a0 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}, NSFilePath=/var/mobile/Containers/Data/Application/1795C59B-185F-4607-8682-004CDF3CDED7/Library/Caches, NSUserStringVariant=(
Remove
)}
My app have to download many image from web. So I want to provide a button to clear caches of this images.
Are these images save in /Library/Caches ?
I Assuming that there are stored in the /Library/Caches. So I attempt to delete these files by:
filemgr = [NSFileManager defaultManager];
NSError *error;
[filemgr removeItemAtPath: [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0] error:&error]
// OR
[filemgr removeItemAtPath:[NSHomeDirectory() stringByAppendingString:#"/Library/Caches"] error:&error];
Both are error with The operation couldn’t be completed. (Cocoa error 513.) in iOS device, but worked in Simulator.
Thank you for answer!
You cant remove "/Library/Caches". You need to remove all items in"/Library/Caches"
NSString *path = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];
for (NSString *filePath in [[NSFileManager defaultManager] enumeratorAtPath:path])
{
NSError *error = nil;
[[NSFileManager defaultManager] removeItemAtPath:[path stringByAppendingPathComponent:filePath] error:&error];
if (error)
{
NSLog(#"%#",error.description);
}
}
You can not remove direct Cache folder. You have to parse every file from Cache folder and remove them.
Thanks.
I developed iPhone app in which i got stuck at one point,
What i want to do is,
I want to copy my Database from bundle to folder inside document directory
When i try to create folder inside DocDir it doesn't getting created and it shows error,
Failed to create MyDB.sql file with message 'The operation couldn’t be completed. (Cocoa error 4.)
Here is my code snippet,
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [[paths objectAtIndex:0] stringByAppendingString:#"/NewFolder/"];
NSString *dbPath = [documentsDir stringByAppendingPathComponent:#"MyDB.sql"];
BOOL success = [fileManager fileExistsAtPath:dbPath];
if(!success) {
NSString *defaultDBPath = [[NSBundle mainBundle] pathForResource:#"MyDB" ofType:#"sql"];
success = [fileManager copyItemAtPath:defaultDBPath toPath:dbPath error:&error];
if (!success)
NSAssert1(0, #"Failed to create writable database file with message '%#'.", [error localizedDescription]);
}
Where i am doing mistake? please help
Thanks in advance.
Try to create directory by following code, may you get help..
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:#"/YourFolder"];
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])//Check
[[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error]; //Will Create folder
I try to get my file in my self created Directory in the Documents Directory into a NSData Object like this:
NSString *path = [documentsDirectory stringByAppendingFormat:#"%#%#",#"/",fileName];
NSError* errorr = nil;
NSData *fileData = [NSData dataWithContentsOfFile:path options: 0 error: &errorr];
if (fileData == nil)
{
NSLog(#"Failed to read file, error %#", errorr);
}
else
{
}
But i always get this error:
Failed to read file, error Error Domain=NSCocoaErrorDomain Code=257 "The operation couldn’t be completed. (Cocoa error 257.)" UserInfo=0x156be110 {NSFilePath=/var/mobile/Applications/679253E3-652C-45EE-B589-609E52E4E3B0/Documents/upload/test.xml, NSUnderlyingError=0x156ba7f0 "The operation couldn’t be completed. Permission denied"}
So if i check if the file is readable:
if ([[NSFileManager defaultManager] isReadableFileAtPath: path] == YES)
NSLog (#"File is readable");
else
NSLog (#"File is read only");
i get the result that the file is readable, so why do i get the error if i want to parse that file into NSData?!
UPDATE: i created my file like this:
NSString *filePath = [self dataFilePath:fileName];
[xmlData writeToFile:filePath atomically:YES];
- (NSString *)dataFilePath: (NSString *) path {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *documentsDirectory = [[paths objectAtIndex:0] stringByAppendingPathComponent:#"upload"];
NSError *error = nil;
if (![[NSFileManager defaultManager] fileExistsAtPath:documentsDirectory])
[[NSFileManager defaultManager] createDirectoryAtPath:documentsDirectory withIntermediateDirectories:NO attributes:nil error:&error];
NSString *documentsPath = [documentsDirectory
stringByAppendingPathComponent:path];
return documentsPath;
}
UPDATE2: After creating the file, i move it into another Directory with this function:
- (void)moveXmlFilesToUploadDirectory
{
#try {
//Check if FILES_DIR exists
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *documentsDirectory = [[paths objectAtIndex:0] stringByAppendingPathComponent:FILES_DIR];//filesDir
NSString *uploadDirectory = [[paths objectAtIndex:0] stringByAppendingPathComponent:UPLOAD_DIR];//filesDir
if ([[NSFileManager defaultManager] fileExistsAtPath:documentsDirectory])
{
NSString *extension = #"xml";
NSArray *contents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentsDirectory error:NULL];
NSEnumerator *e = [contents objectEnumerator];
NSString *filename;
while ((filename = [e nextObject])) {
if ([[filename pathExtension] isEqualToString:extension]) {
[[NSFileManager defaultManager] moveItemAtPath:documentsDirectory toPath:[uploadDirectory stringByAppendingPathComponent:filename] error:NULL];
}
}
}
}
#catch (NSException *exception) {
}
#finally {
}
}
Maybe the Problem is after moving the file! Cause if i try to get my file into a NSData before i move it, everything works...
It seems that you try to copy the whole directory to a destination meant to be a file. The result is that the filepath is a directory path in the end so you can't open it like a file which leads to the permission error message.
You should update your copy code to
while ((filename = [e nextObject])) {
if ([[filename pathExtension] isEqualToString:extension]) {
[[NSFileManager defaultManager] moveItemAtPath:[documentsDirectory stringByAppendingPathComponent: filename] toPath:[uploadDirectory stringByAppendingPathComponent:filename] error:NULL];
}
}
to copy every file individually. That will create than the actual file at the destination path intend of a directory.
The chances are high that you don't have the right permissions for that file. Please check the permissions and add read access for the current user or "everyone". You can set the read permissions for your user by the info dialog (cmd + i) or in the terminal with chmod u+r test.xml. Eventually you have to set the owner before with
sudo chown yourusername test.xml
Hope that makes sense.