I am supposed to have downloaded a file on the iPad simulator, using an appication.
How can I check that this file is present on the iPad simulator file system ?
Is there some file manager that I can use to check the existence of the file and possibly its contents?
You can find the simulator at
/Username/Library/Application
Support/iPhone Simulator/4.2/
where "4.2" is the SDK version.
Under that folder you find all applications in cryptical subfolders. One of them is yours.
In there you'lss find "Documents" which is your app's personal folder.
Use these methods, you can verify a file is present in the documents directory. I've not tested this exact example but it should work.
Example:
NSString *filePath = [self dataFilePathInDocuments:#"MyFile.txt"];
if([self fileExistsAtPath:filePath]) {
NSLog(#"The file exits at %#", filePath);
} else {
NSLog(#"The doesn't exist at %#", filePath);
}
Code:
- (NSString *)dataFilePathInDocuments:(NSString*)aFilename {
NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docDirectory = [paths objectAtIndex:0];
return [docDirectory stringByAppendingPathComponent:aFilename];
}
- (BOOL) fileExistsAtPath:(NSString*)aFilepath {
NSFileManager *fm = [NSFileManager defaultManager];
return [fm fileExistsAtPath:aFilepath];
}
Related
I have searched everywhere but could not find answer to this question. I have made an app that uses previous build Sqlite database. On Simulator My database file is at
/Users/idsMac/Library/Application Support/iPhone Simulator/7.1/Applications/AAAAAAAA-CCCCC-DDDD-7777-PPPPPPPPPP/Documents/
I am using the following code to read this Sqlite Database file.
-(NSString *)dataFilePath{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths lastObject];
return [documentsDirectory stringByAppendingPathComponent:#"punDictionary.sqlite"];
}
if((sqlite3_open([[self dataFilePath] UTF8String], &_database)) != SQLITE_OK){
NSLog(#"Failed to open Database");
}else{
NSLog(#"Database Connceted ..... ");
}
My App is working great on Simulator .. But When I test it on my IOS Device. It is not detecting the Database.
My question is how shall I add the sqlite Database file to my app to test on Device ?
Thanks in Advance !
Include the Sqlite DB file into your project, and copy it into Documents folder if not exist when the app access the DB file.
#define DB_NAME #"XXX.sqlite"
#define DB_FULLPATH [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:DB_NAME]
+ (void)createDatabase
{
NSFileManager *fileManager = [NSFileManager defaultManager];
if(![fileManager fileExistsAtPath:DB_FULLPATH]) {
NSString *bundlePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:DB_NAME];
[fileManager copyItemAtPath:bundlePath toPath:DB_FULLPATH error:nil];
}
}
I'm new to the iPhone development and Mac OS, please bear with the silly query. But I tried hard to get into depth but couldn't found the solution for the problem.
I have created a database in sqlite through command prompt. The database is saved in Users/DNamto/resources.db
But when am trying to open this db in my iPhone application using the following code snippet
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
// Build the path to the database file
databasePath = [[NSString alloc]initWithString: [docsDir stringByAppendingPathComponent:#"resources.db"]];
The database fails to open up.
The database path which the application is searching for is :
/Users/DNamto/Library/Application Support/iPhone Simulator/6.0/Applications/C82C3DAF-4E95-49A7-9A4F-4D69B056DC9D/Documents/resources.db
Can anyone help me to get the correct database path.
Can we hard code the DB path so that my application links to it. If yes then please provide the code snippet.
Add your database in the application & check if the db is present in doc directory or not, if not then you need to copy it in doc directory and then access it.
For cppy the db in doc directory use following code snippet
- (void)copyDatabaseIfNeeded {
BOOL success;
NSFileManager *fileManager = [NSFileManager defaultManager];
success = [fileManager fileExistsAtPath:[self getDBPath]];
NSString *databasePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"dbname.sqlite"];
if(success)
{
return;// remove old one.
}
[fileManager copyItemAtPath:databasePath toPath:[self getDBPath] error:nil];
}
To open the db use following code snippet
-(void)openDatabase
{
#try
{
[self copyDatabaseIfNeeded];
if(sqlite3_open([[self getDBPath] UTF8String], &mainDatabase)==SQLITE_OK)
{
NSLog(#"Database opened");
}
}
#catch (NSException *exception)
{
NSLog(#"Exception in openDatabase %# :%#",exception.name,exception.reason);
}
}
- (NSString *)getDBPath
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
return [documentsDir stringByAppendingPathComponent:#"dbname.sqlite"];
}
Use following code snippet to close the database.
-(void)closeDatabase:(sqlite3_stmt*)statement
{
#try
{
sqlite3_finalize(statement);
sqlite3_close(mainDatabase);
}
#catch (NSException *exception)
{
NSLog(#"Exception in DatabaseController closeDatabase %# :%#",exception.name,exception.reason);
}
}
You can't. In real device you can't get the hard coded path.
You need a relative path.
Here your issue is your database is not present in the document directory.
You need to add your database to your main bundle and in run time you need to check whether the db is present on document directory, if not you need to copy it to document directory using the NSFileManager.
You can use the following code to copy the database file from bundle to document directory.
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *sourcePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"resource.db"];
NSString *folderPath = [documentsDirectory stringByAppendingPathComponent:#"resource.db"];
NSError *error;
[[NSFileManager defaultManager] copyItemAtPath:sourcePath toPath:folderPath error:&error];
In my iOS app I would like that user can download some jpg file via iTunes. So I've enabled UIFileSharingEnabled. But users are now able to put files in my app. I would like to block that. Is there a way to do that ?
Thanks !
Don't think you can block it, but you can just delete unwanted files when your app becomes active.
Put some code a bit like the sample below - filling in the test to avoid deleting the files you want to be available in iTunes.
Call this from within applicationDidBecomeActive: in your application delegate.
If you're more cautious you might want to check the user hasn't dropped a jpg file with the same name as the one you've parked there. You could test for sameness of date or some such or, if you've not got many files, just delete everything and write them again when the app becomes active.
- (void) removeUnwantedFiles;
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSArray* directoryContents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:inboxPath error:NULL];
if (!directoryContents || [directoryContents count] == 0)
{
return;
}
for (NSString* fileName in directoryContents)
{
if ( /* some test of filename to see if it's one of my kosher files */ ) continue;
NSString* filePath = [documentsDirectory stringByAppendingPathComponent:fileName];
NSError* error = nil;
BOOL success = [[NSFileManager defaultManager] removeItemAtPath:filePath error:&error];
// NSLog(#"Deleting (%#): %#", success ? #"succeeded" : #"failed", [filePath lastPathComponent]);
if (!success)
{
NSLog(#"Error: %#", [error localizedDescription]);
}
}
}
In the Simulator I can save an NSMutableArray to a file and read it back with the following code:
NSFileManager *fileManager = [NSFileManager defaultManager];
if ([fileManager fileExistsAtPath:#"RiskValues"]){ // If file exists open into table
NSLog(#"Risk Values File Exists");
NSArray *paths = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullFileName = [NSString stringWithFormat:#"RiskValues", documentsDirectory];
gRiskValues = [[NSMutableArray alloc] initWithContentsOfFile:fullFileName];
gRiskValuesAlreadyInitialised = YES;
} else {
NSLog(#"Can't find RiskValues file, so initialising gRiskValues table");
Do something else .......
}
This doesn't work on the device. I have tried to locate the file using the following but it still doesn't work:
NSString *fullFileName = [documentsDirectory stringByAppendingPathComponent#"RiskValues"];
What am I doing wrong?
Great answers from everyone. I have resolved the file path and existence issues at a stroke. Many, many thanks.
You have to provide absolute path here:
if ([fileManager fileExistsAtPath:#"RiskValues"])
So it must look like this:
NSArray *paths = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullFileName = [documentsDirectory stringByAppendingPathComponent:#"RiskValues"];
NSFileManager *fileManager = [NSFileManager defaultManager];
if ([fileManager fileExistsAtPath: fullFileName]){ // If file exists open into table
NSLog(#"Risk Values File Exists");
gRiskValues = [[NSMutableArray alloc] initWithContentsOfFile:fullFileName];
gRiskValuesAlreadyInitialised = YES;
} else {
NSLog(#"Can't find RiskValues file, so initialising gRiskValues table");
Do something else .......
}
NSString *fullFileName = [NSString stringWithFormat:#"RiskValues", documentsDirectory];
this line, you're not creating your full path string right. what you should do is
NSString *fullFileName = [documentsDirectory stringByAppendingPathComponent:#"RiskValues"];
also this check
if ([fileManager fileExistsAtPath:#"RiskValues"])
Will never pass on iOS as it is not a full path to any place you are allowed to write at in your sandbox. I suppose it works on the simulator because on the mac it's looking up relatively to the HD root (or something, not sure how the mac file system works :) ), but on the iOS you're going to have to give it a path to a file/directory in your documents (maybe by appending #"RiskValues" to it or whatever)
1) [NSString stringWithFormat:#"RiskValues", documentsDirectory] is just #"RiskValues". So this name points to file in application's directory.
2) [fileManager fileExistsAtPath:#"RiskValues"] searches for file in application directory. It's available for read/write in simulator (it's in your computer file system after all) but it's read-only on device.
BTW (NSFileManager Class Reference)
Attempting to predicate behavior based
on the current state of the file
system or a particular file on the
file system is not recommended. Doing
so can cause odd behavior in the case
of file system race conditions. It's
far better to attempt an operation
(such as loading a file or creating a
directory), check for errors, and
handle any error gracefully than it is
to try to figure out ahead of time
whether the operation will succeed.
Solution:
1) Do not check file presence. Just try to make dictionary with initWithContentsOfFile:encoding:error:
2) You want it to be in documents directory so construct path like this
[documentsDirectory stringByAppendingPathComponent:#"RiskValues"];
I am developing an iPhone app with someone else. The app works fine for me, but he is running into a bug. We think this bug is related to the fact that he is getting multiple Application directories for this same app. In my ~/Library/Application Support/iPhone Simulator/User/Applications, I only have one folder at all times.
He says that he will get 3 or 4 directories when he is only working on this one app. We think this is our problem because our bug has to do with displaying images that are stored in the app's Documents folder. Does anyone know why he is ending up with multiple directories or how to stop it?
Edit:
Here is the code for writing the image to a file:
NSData *image = [NSData dataWithContentsOfURL:[NSURL URLWithString:[currentArticle articleImage]]];
NSArray *array = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *imagePath = [array objectAtIndex:0];
NSFileManager *NSFM = [NSFileManager defaultManager];
BOOL isDir = YES;
if(![NSFM fileExistsAtPath:imagePath isDirectory:&isDir])
if(![NSFM createDirectoryAtPath:imagePath attributes:nil])
NSLog(#"error");
imagePath = [imagePath stringByAppendingFormat:#"/images"];
if(![NSFM fileExistsAtPath:imagePath isDirectory:&isDir])
if(![NSFM createDirectoryAtPath:imagePath attributes:nil])
NSLog(#"error");
imagePath = [imagePath stringByAppendingFormat:#"/%#.jpg", [currentArticle uniqueID]];
[image writeToFile:imagePath atomically:NO];
And here is the code for getting the path when I need the image:
- (NSString *)imagePath
{
NSArray *array = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *imagePath = [array objectAtIndex:0];
return [imagePath stringByAppendingFormat:#"/images/%#.jpg", [self uniqueID]];
}
The app works great for me, but my partner says that the images don't show up intermittently, and he notices that he gets multiple directories in his Applications folder.
I had this problem (I was saving photos in the apps documents directory) and after every new build the directory get's renamed, so my paths were no longer valid. I cooked up these 2 functions (in my app delegate) that will give me a path for the file I want to save or load from the documents or temp directory. Even if the app directory changes, as long as you only store the file name and not the full path, and then use your helper functions to get the path when you need it later you will be ok. Here's my functions for this:
+ (NSString*)fullPathToFile:(NSString*)file {
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* documentsDirectory = [paths objectAtIndex:0];
return [documentsDirectory stringByAppendingPathComponent:file];
}
+ (NSString*)fullPathToTemporaryFile:(NSString*)file {
return [NSTemporaryDirectory() stringByAppendingPathComponent:file];
}
Works like a charm.