I have this code who create a new database file:
// Get the documents directory
NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docsDir = dirPaths[0];
// Build the path to the database file
databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent:#"registros.db"]];
NSLog(#"DB Path: %#", databasePath);
This code always create in this directory:
DB Path: /Users/williamlima/Library/Application Support/iPhone
Simulator/7.0.3/Applications/0E94A6EA-B72F-4A11-88A9-EC8C1A55BF17/Documents/registros.db
Unfortunately I could not find this file and try to open the file manager. SQL, I would like to at least try to find this file, up or maybe try to modify some command in my code for this file to be created within the folder next to the files. h / .m / .xib, I'm still a beginner in this language, then, is this possible?
The files .h /.m / .xib are in your project and they get compiled (.m and .xib) and packaged into app. This app is installed on simulator. So first of all you won't see these files in simulator at following location
/Users/williamlima/Library/Application Support/iPhone Simulator/7.0.3/Applications/0E94A6EA-B72F-4A11-88A9-EC8C1A55BF17/
When you run the app, it will create file in Documents directory in your simulator app not in your project. That location is accessible by your code running in the app.
You can create directories which are explained in these questions:
How to make a directory iOS?
Is an iPhone app's document directory /var/mobile/Documents or /var/mobile/Library/AppName?
And then create files in those directories. I think you are confused why you don't see them in your project. The reason is it is created in the app location not in your project.
Related
I save some run-time generated files inside the .app bundle of my iOS app. In the simulator it works fine, in the device it crashes:
Could create output files in the given shader cache path
'/var/mobile/Applications/CB064997-B40E-4FE3-9834-B3217CE33489/SimedTest.app/Ogre3D/assets/RTShaderLib/cache/
Is there a good overview of where I should and shouldn't put files - how to use Documents, Library and tmp, etc?
To clarify, these are files created at startup which pre-calculate some data to save time. IF they are not present they get created so it's fine they are deleted, but not while the app is running.
The bundle is read-only. You don't want to mess around with it for two reasons:
Code Signing: the signature is verified by against the contents of the bundle; if you mess around with the bundle, you break the signature.
App Updates: updates work by replacing the entire app bundle with a newly downloaded one; any changes you make will get lost.
Where you should save stuff:
Documents: if you want it to persist and be backed up
Library/Caches: if you just want to cache downloaded data, like profile pics; will be auto deleted by the system if it is low on room unless you specify with a special do-not-delete flag.
tmp: temporary files, deleted when your app is not running
For a full explanation check out File System Programming Guide and QA1719.
No, every time you change your bundle you invalidate your signature.
If you want to write files you`l need to write in the best folder depending on what you want to do with that file.
Documents folder for long duration files
Cache for small operations
and so on
EDIT
To get the path you`ll need something like this:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"filename.ext"];
With this path you can write or read like this:
write:
NSString *content = #"One\nTwo\nThree\nFour\nFive";
[content writeToFile:fileName atomically:NO encoding:NSStringEncodingConversionAllowLossy error:nil];
read:
NSString *content = [[NSString alloc] initWithContentsOfFile:fileName usedEncoding:nil error:nil];
i deployed my App to my iPhone and get
Unknown error calling sqlite3_step (8: attempt to write a readonly database) eu
on Insert / Update Statements.
On the Simulator it all works like it should.
My sqlite Database is placed in the Resource Folder (Xcode).
Thanks for help!
Your application bundle is not writable on the iPhone. You MUST copy the file somewhere else, like your documents folder. It works in the simulator because the Mac does not enforce all the sandboxing restrictions the iPhone does.
You can copy your database from the application bundle directory to the Documents directory in viewDidLoad. You can read/write from/to your database in the Documents directory after this. Of course, you need to check if the database in the Documents directory exist before you do the copy in order not to overwrite it the next time you bring up the app.
Assuming you have defined your database name '#define kFilename #"yourdatabase.db"' in the .m file.
In viewDidLoad add:
// Get the path to the main bundle resource directory.
NSString *pathsToReources = [[NSBundle mainBundle] resourcePath];
NSString *yourOriginalDatabasePath = [pathsToResources stringByAppendingPathComponent:kFilename];
// Create the path to the database in the Documents directory.
NSArray *pathsToDocuments = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [pathsToDocuments objectAtIndex:0];
NSString *yourNewDatabasePath = [documentsDirectory stringByAppendingPathComponent:kFilename];
if (![[NSFileManager defaultManager] isReadableFileAtPath:yourNewDatabasePath]) {
if ([[NSFileManager defaultManager] copyItemAtPath:yourOriginalDatabasePath toPath:yourNewDatabasePath error:NULL] != YES)
NSAssert2(0, #"Fail to copy database from %# to %#", yourOriginalDatabasePath, yourNewDatabasePath);
}
Good luck!
aobs
I am creating a quiz app for iPhone. I store all the questions in an NSArray that is loaded from a .xml file every time the app is opened. That file will be the same accross all "instances" of the app, and it will never be changed by the user.
I could hard-code all the questions with code, but I found it more elegant to have it in a file that is easily edited by any text editor.
But how do I give each app "instance" of the app a copy of that file? That file should be bundled along with the rest of the application files.
This is the code I use so far (in app delegate).
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask,
YES);
NSString *path = documentPaths[0];
path = [path stringByAppendingPathComponent:#"questions.archive"];
NSArray *fileQuestions = [[NSArray alloc] initWithContentsOfFile:path];
if (!fileQuestions)
{
// Code to add three default questions…
[fileQuestions writeToFile:path
atomically:YES];
}
// And here the "file questions" are transformed to instances of my question class
No need to try to store the file in Documents directory. Just store it right there in the app bundle itself. This works exactly like an image file, a sound file, or any other resource. Make the file part of the project; make sure it is part of the app target, so that it will be copied into the app bundle as part of the build process. In the running app, get its path with [[NSBundle mainBundle] pathForResource:ofType:], and read it as you would any file of this type.
I am having problems updating an app to iOS7 SDK. Before I've used iOS 6 SDK and accessed my mp3 file using a NSURL for the folder like this:
NSURL *folderURL = [[NSBundle mainBundle] URLForResource:#"" withExtension:#"" subdirectory:#"AudioGuide"];
Now, using the iOS 7 SDK I always get nil as the value for folderURL and my audio guide doesn't find the mp3's anymore.
I've already looked into the generated .app-Bundle for the simulator (in ~/Library/Application Support/...), and I can see the "AudioGuide" folder in the root. So it's definitly there.
I am not that iOS guru and didn't really follow iOS7 updates. Has there been any changes made on how to access own assets in an app? How do I access my files?
Apple doc for - (NSURL *)URLForResource:(NSString *)name withExtension:(NSString *)extension subdirectory:(NSString *)subpath
Returns the file URL for the resource file identified by the specified
name and extension and residing in a given bundle directory.
what that means is you can get the file URL with specific type in a given subdirectory, so you should use this method call with your file name and extension.
If you are trying to read the list of files under that directory, what you can do is bundle all of your audio files in a single zip or gzipped file and you extract it in your Documents or Application Support directory when it is accessed for the very first time, then you can read it using the code below.
NSArray *directories = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
NSString *directory = [directories objectAtIndex:0];
NSString *audioDirectoryPath = [directory stringByAppendingPathComponent:#"AudioGuide"];
NSArray *audioFiles = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:audioDirectoryPath];
Hope this helps!
I save some run-time generated files inside the .app bundle of my iOS app. In the simulator it works fine, in the device it crashes:
Could create output files in the given shader cache path
'/var/mobile/Applications/CB064997-B40E-4FE3-9834-B3217CE33489/SimedTest.app/Ogre3D/assets/RTShaderLib/cache/
Is there a good overview of where I should and shouldn't put files - how to use Documents, Library and tmp, etc?
To clarify, these are files created at startup which pre-calculate some data to save time. IF they are not present they get created so it's fine they are deleted, but not while the app is running.
The bundle is read-only. You don't want to mess around with it for two reasons:
Code Signing: the signature is verified by against the contents of the bundle; if you mess around with the bundle, you break the signature.
App Updates: updates work by replacing the entire app bundle with a newly downloaded one; any changes you make will get lost.
Where you should save stuff:
Documents: if you want it to persist and be backed up
Library/Caches: if you just want to cache downloaded data, like profile pics; will be auto deleted by the system if it is low on room unless you specify with a special do-not-delete flag.
tmp: temporary files, deleted when your app is not running
For a full explanation check out File System Programming Guide and QA1719.
No, every time you change your bundle you invalidate your signature.
If you want to write files you`l need to write in the best folder depending on what you want to do with that file.
Documents folder for long duration files
Cache for small operations
and so on
EDIT
To get the path you`ll need something like this:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"filename.ext"];
With this path you can write or read like this:
write:
NSString *content = #"One\nTwo\nThree\nFour\nFive";
[content writeToFile:fileName atomically:NO encoding:NSStringEncodingConversionAllowLossy error:nil];
read:
NSString *content = [[NSString alloc] initWithContentsOfFile:fileName usedEncoding:nil error:nil];