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]);
}
}
}
Related
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 application I want to implement a simple Alarm function. I know how to use UILocalNotifications, but I came across this source code with a like UI of the iPhone's native Clock app alarm area as well as it having a believe a type of data persistence. Two things I am not good at interface design and data persistence this source code has. But I downloaded it and started playing around with it to find the alarms are not persistent.
Download
Does anyone know how the source code can be adjusted so that it is persistent and the plist can be saved and read to and from? I am open to learning too, this area is somewhat unknown to me too. Thanks
I review your code and find issue that you not moved your "Alarms.plist" file form resource to document directory. we are not able to edit file which is in resource folder. so write following code in app delegate file.
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *theFileName = #"Alarms.plist"; //Change this appropriately
NSString *oldPath = [[NSBundle mainBundle] pathForResource:#"Alarms" ofType:#"plist"];//[NSString stringWithFormat:#"%#/Inbox/%#", documentsDirectory, theFileName];
NSString *newPath = [NSString stringWithFormat:#"%#/%#", documentsDirectory, theFileName];
if (![[NSFileManager defaultManager] fileExistsAtPath:newPath])
[[NSFileManager defaultManager] moveItemAtPath:oldPath toPath:newPath error:nil];
Perform save operation on file which is in Document directory folder.
try this code... to save plist from bundle to Document Directory
Notice that you will have "Unable to read... " just at the first app launch
- (NSMutableArray *)displayedObjects
{
if (_displayedObjects == nil)
{
NSString *path = [[self class] pathForDocumentWithName:#"Alarms.plist"];
NSArray *alarmDicts = [NSMutableArray arrayWithContentsOfFile:path];
if (alarmDicts == nil)
{
NSLog(#"Unable to read plist file: %#", path);
NSLog(#"copy Alarms.plist to: %#", path);
NSString *pathToSetingbundle = [[NSBundle mainBundle] pathForResource:#"Alarms" ofType:#"plist"];
[[NSFileManager defaultManager]copyItemAtPath:pathToSetingbundle toPath:path error:nil];
}
_displayedObjects = [[NSMutableArray alloc]
initWithCapacity:[alarmDicts count]];
for (NSDictionary *currDict in alarmDicts)
{
Alarm *alarm = [[Alarm alloc] initWithDictionary:currDict];
[_displayedObjects addObject:alarm];
NSLog(#"#disply obj %#", alarm);
}
}
return _displayedObjects;
}
As part of my app start-up i copy bundle files to my documents directory.
This works fine for three out of four of my files but the fourth one create a Zero KB file.
running on iOS 5.0 sim. I have cleaned the build several times and checked the file name capitalization vis correct.
the file appears in the directory but is zero kb and should be 24K
any help appreciated.
-(BOOL) CheckDBs: (NSString *)dbname
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
NSString *dbPath = [documentsDir stringByAppendingPathComponent:dbname];
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL success = [fileManager fileExistsAtPath: dbPath];
NSLog(#"AppDelegate CheckDatabase: %# = %i", dbPath, success);
if (success) {
//NSLog(#"return YES");
return YES;
}
else {
return NO;
}
} // Complete - checks if files exist in the User Documents directory
-(void) copyDBs: (NSString *) dbname
{
//Using NSFileManager we can perform many file system operations.
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
NSString *dbPath = [documentsDir stringByAppendingPathComponent:dbname];
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:dbname];
BOOL success = [fileManager copyItemAtPath:defaultDBPath toPath:dbPath error:&error];
if (success) {
// Version 4.0 code
//NSDictionary *attribs = [NSDictionary dictionaryWithObject:NSFileProtectionComplete forKey:NSFileProtectionKey];
//success = [fileManager setAttributes:attribs ofItemAtPath:dbPath error:&error];
NSLog(#"AppDelegate copyDatase: %# = %d", dbPath, success);
}
//NSLog(#"AppDelegate copyDatase: %# = %d", dbPath, success);
if (!success) {
NSLog(#"Failed to copy database: '%#'", [error localizedDescription]);
// NSAssert1(0, #"Failed to create writable database file with message '%#'.", [error localizedDescription]);
}
}
Have you also checked the original file size?
Try resetting your simulator. From the NSFileManager documentation:
If a file with the same name already exists at dstPath, this method
aborts the copy attempt and returns an appropriate error.
Make sure the destination is empty and try again. Also, check the error object.
If all that checks out there has got to be an error in spelling the file name. Check if the exact file exists in bundle, NSLog wherever you use a file name or path, etc. You should find the error. Also check the appropriate folder in the Finder.
Instead of using
[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:dbname]
try
[[NSBundle mainBundle] pathForResource:shortName ofType:#"db"]
Ok I figured out what is causing the problem.
as i run the app the appdidfinishlaunching method is not complete before one of the view controllers is loading. That view controller attempts to access one of the files being copied over from the bundle.
I'm guessing that sqlite creates the file when you attempt to access the database, it creates it with with a zero bytes length.
So when my appdidfinish launching method checks for the existance of the file it exists due to the sql call.
This is usually only going to be a problem prior to the first run of the app as after that the database will exist.
problem now is how do i get the appdidfinish launching to complete prior to the rest being allow to start as the view controller in question is part of the mainwindow.xib
I need to write a string into a file. For that, my code is:
-(void)writeToFile:(NSString *)fileName: (NSString *)data {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
// the path to write file
NSString *appFile = [documentsDirectory stringByAppendingPathComponent:fileName];
[data writeToFile:appFile atomically:YES];
}
I am calling this method like this
ownServices *obj = [[ownServices alloc]init];
[obj writeToFile:#"iphone.txt" :#"this is mahesh babu"];
but it didn't write into the text file.
What's the reason? Can anyone please help me.
Thank u in advance.
The most likely problem is that the documents directory does not exist. Create it if it doesn't, then write to it:
NSArray *paths = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
NSString *parentDir = [paths objectAtIndex:0];
/* Create the parent directory.
* This is expected to fail if the directory already exists. */
(void)[[NSFileManager defaultManager]
createDirectoryAtPath:parentDir
withIntermediateDirectories:YES
attributes:nil error:NULL];
NSString *path = [parentDir stringByAppendingPathComponent:fileName];
/* Now write, and if it fails, you'll know why thanks to the |error| arg. */
NSError *error = nil;
BOOL ok = [data writeToFile:path options:NSDataWritingAtomic error:&error];
if (!ok) {
NSLog(#"%s: Failed to write to %#: %#", __func__, path, error);
}
Even simpler would be to use the latest API, which will create the directory for you if it doesn't already exist:
NSError *error = nil;
NSURL *parentURL = [[NSFileManager defaultManager]
URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask
appropriateForURL:nil create:YES error:&error];
if (!parentURL) {
NSLog(#"%s: *** Failed to get documents directory: %#", __func__, error):
return;
}
NSURL *furl = [parentURL URLByAppendingPathComponent:fileName];
error = nil;
BOOL ok = [data writeToURL:furl options:NSDataWritingAtomic error:&error];
if (!ok) {
NSLog(#"%s: *** Failed to write to %#: %#", __func__, furl, error);
}
Firstly, you are calling your method strangely. Rename the method to
-(void)writeString:(NSString *) data toFile:(NSString *)fileName
and call it like so:
[obj writeString:#"this is mahesh babu" toFile:#"iphone.txt"];
Secondly, writeToFile:atomically: is deprecated, use writeToFile:atomically:encoding:error::
NSError *error = nil;
BOOL success = [data writeToFile:appFile atomically:YES encoding:NSUTF8Encoding error:&error];
if (!success) {
NSLog(#"Error: %#", [error userInfo]);
}
This way, you also see what the error is.
Your code looks OK. Use the debugger (or an NSLog statement) to verify the values of data and appFile. If data is nil, nothing will happen (including no errors) because sending a message to nil is a no-op. It's also possible that appFile is not the path you think it is.
Check the permissions of the directory you are trying to write to (ls -la). On the device you can't, but on the simulator you can. Is it read-only for you? Is it owned by another user?
Assuming that isn't the problem, try calling with atomically:NO. Atomic file writing is performed by writing a file, then renaming it to replace the old one. If the problem is there, that will isolate the problem.
Bonus Style Critique
Class names should start with an uppercase letter: OwnServices instead of ownServices
Although your method name is perfectly valid, it's unusual to have two parameters with no words to separate them. A name like writeToFile:string: would be better.
Don't name a variable data if it is meant to point to an instance of something other than NSData. It's confusing, and there's almost a better (more specific) word you can use beside "data".
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];
}