I am doing iCloud sync with core data works fine. Now i want to add on/off switch(migrate store). If i migrate store to iCloud to local works fine but if migrate back to iCloud datas getting duplicate. Even i tried to remove ubiquity container before migrate not helping. I could not deduplicate because "StoreDidImportUbiquitousContent" method not called after duplicate data.
Code below :
// Migrate to local
-(NSURL *)localStoreURL
{
NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:#"LocalExpns.sqlite"];
return storeURL;
}
- (void)moveStoreToLocal
{
NSError *error = nil;
NSPersistentStoreCoordinator * persistentStoreCoordinator = self.persistentStoreCoordinator;
NSPersistentStore * persistentStore = [[persistentStoreCoordinator persistentStores] firstObject];
if([[NSFileManager defaultManager]fileExistsAtPath:[self localStoreURL].path])
{
NSLog(#"File exists");
[[NSFileManager defaultManager] removeItemAtPath:[self localStoreURL].path error:& error];
NSLog(#"Removing error = %#", error);
}
NSMutableDictionary *localStoreOptions = [[self localStoreOptions] mutableCopy];
[localStoreOptions setObject:[NSNumber numberWithBool:YES] forKey:NSPersistentStoreRemoveUbiquitousMetadataOption];
id result = [persistentStoreCoordinator migratePersistentStore:persistentStore toURL:[self localStoreURL] options:localStoreOptions withType:NSSQLiteStoreType error:&error];
}
Above code working fine.
// Migrate to iCloud back
// fileURL is local file url
-(NSURL *)storeURL
{
NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:#"Expns.sqlite"];
return storeURL;
}
- (void)moveStoreFileToICloud:(NSURL*)fileURL
{
NSPersistentStoreCoordinator * persistentStoreCoordinator = self.persistentStoreCoordinator;
id sourceStore = [[persistentStoreCoordinator persistentStores] firstObject];
if (!sourceStore) {
NSLog(#" failed to add old store");
} else {
NSLog(#" Successfully added store to migrate");
bool moveSuccess = NO;
NSError *error;
NSLog(#" About to migrate the store...");
// Now migrate the store using the iCloud options
id migrationSuccess = [self.persistentStoreCoordinator migratePersistentStore:sourceStore toURL:[self storeURL] options:[self icloudStoreOptions] withType:NSSQLiteStoreType error:&error];
if (migrationSuccess) {
moveSuccess = YES;
NSLog(#"store successfully migrated");
// Now delete the local file
if (shouldDelete) {
NSLog(#" deleting local store");
[self deleteLocalStore];
} else {
NSLog(#" not deleting local store");
}
}
else {
NSLog(#"Failed to migrate store: %#, %#", error, error.userInfo);
}
}
}
Now data get duplicate what ever in before migrate. I tried to remove ubiquity container also not helping.
I have solved this problem by de-duplicate my db manually like this
Related
I'm relatively new to objective-c and hardly know much of swift.
I've been trying to make an app which will implement simpleAuth in order to create a link to the ForsquareWeb API.
I'm using cocoapods and have imported the SimpleAuth related files into my product.
Every file seems to be fine except the SimpleAuth target, specifically the SimpleAuthForSquareWebProvider.m file. This is what the file itself looks like;
//
// SimpleAuthFoursquareWebProvider.m
// SimpleAuth
//
// Created by Julien Seren-Rosso on 23/01/2014.
// Copyright (c) 2014 Byliner, Inc. All rights reserved.
//
#import "SimpleAuthFoursquareWebProvider.h"
#import "SimpleAuthFoursquareWebLoginViewController.h"
#import <ReactiveCocoa/ReactiveCocoa.h>
#import "UIViewController+SimpleAuthAdditions.h"
#implementation SimpleAuthFoursquareWebProvider
#pragma mark - SimpleAuthProvider
+ (NSString *)type {
return #"foursquare-web";
}
+ (NSDictionary *)defaultOptions {
// Default present block
SimpleAuthInterfaceHandler presentBlock = ^(UIViewController *controller) {
UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:controller];
navigation.modalPresentationStyle = UIModalPresentationFormSheet;
UIViewController *presented = [UIViewController SimpleAuth_presentedViewController];
[presented presentViewController:navigation animated:YES completion:nil];
};
// Default dismiss block
SimpleAuthInterfaceHandler dismissBlock = ^(id controller) {
[controller dismissViewControllerAnimated:YES completion:nil];
};
NSMutableDictionary *options = [NSMutableDictionary dictionaryWithDictionary:[super defaultOptions]];
options[SimpleAuthPresentInterfaceBlockKey] = presentBlock;
options[SimpleAuthDismissInterfaceBlockKey] = dismissBlock;
return options;
}
- (void)authorizeWithCompletion:(SimpleAuthRequestHandler)completion {
[[[self accessToken]
flattenMap:^RACStream *(NSString *response) {
NSArray *signals = #[
[self accountWithAccessToken:response],
[RACSignal return:response]
];
return [self rac_liftSelector:#selector(dictionaryWithAccount:accessToken:) withSignalsFromArray:signals];
}]
subscribeNext:^(NSDictionary *response) {
completion(response, nil);
}
error:^(NSError *error) {
completion(nil, error);
}];
}
#pragma mark - Private
- (RACSignal *)accessToken {
return [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
dispatch_async(dispatch_get_main_queue(), ^{
SimpleAuthFoursquareWebLoginViewController *login = [[SimpleAuthFoursquareWebLoginViewController alloc] initWithOptions:self.options];
login.completion = ^(UIViewController *login, NSURL *URL, NSError *error) {
SimpleAuthInterfaceHandler dismissBlock = self.options[SimpleAuthDismissInterfaceBlockKey];
dismissBlock(login);
// Parse URL
NSString *fragment = [URL fragment];
NSDictionary *dictionary = [CMDQueryStringSerialization dictionaryWithQueryString:fragment];
NSString *token = dictionary[#"access_token"];
// Check for error
if (![token length]) {
[subscriber sendError:error];
return;
}
// Send completion
[subscriber sendNext:token];
[subscriber sendCompleted];
};
SimpleAuthInterfaceHandler block = self.options[SimpleAuthPresentInterfaceBlockKey];
block(login);
});
return nil;
}];
}
- (RACSignal *)accountWithAccessToken:(NSString *)accessToken {
return [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
NSDictionary *parameters = #{ #"oauth_token" : accessToken };
NSString *query = [CMDQueryStringSerialization queryStringWithDictionary:parameters];
NSString *URLString = [NSString stringWithFormat:#"https://api.foursquare.com/v2/users/self?v=20140210&%#", query];
NSURL *URL = [NSURL URLWithString:URLString];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
[NSURLConnection sendAsynchronousRequest:request queue:self.operationQueue
completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
NSIndexSet *indexSet = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(200, 99)];
NSInteger statusCode = [(NSHTTPURLResponse *)response statusCode];
if ([indexSet containsIndex:statusCode] && data) {
NSError *parseError = nil;
NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&parseError];
if (dictionary) {
[subscriber sendNext:dictionary];
[subscriber sendCompleted];
}
else {
[subscriber sendError:parseError];
}
}
else {
[subscriber sendError:connectionError];
}
}];
return nil;
}];
}
- (NSDictionary *)dictionaryWithAccount:(NSDictionary *)account accessToken:(NSString *)accessToken {
NSMutableDictionary *dictionary = [NSMutableDictionary new];
NSDictionary *userData = account[#"response"][#"user"];
// Provider
dictionary[#"provider"] = [[self class] type];
// Credentials
dictionary[#"credentials"] = #{
#"token" : accessToken
};
// User ID
dictionary[#"uid"] = userData[#"id"];
// Raw response
dictionary[#"extra"] = #{
#"raw_info" : userData
};
// User info
NSMutableDictionary *user = [NSMutableDictionary new];
if (userData[#"contact"][#"email"]) {
user[#"email"] = userData[#"contact"][#"email"];
}
if (userData[#"firstName"]) {
user[#"first_name"] = userData[#"firstName"];
}
if (userData[#"lastName"]) {
user[#"last_name"] = userData[#"lastName"];
}
user[#"name"] = [NSString stringWithFormat:#"%# %#", user[#"first_name"], user[#"last_name"]];
user[#"gender"] = userData[#"gender"];
if ([userData[#"photo"] isKindOfClass:NSDictionary.class]) {
user[#"image"] = [NSString stringWithFormat:#"%#500x500%#", userData[#"photo"][#"prefix"], userData[#"photo"][#"suffix"]];
} else if ([userData[#"photo"] isKindOfClass:NSString.class]) {
user[#"image"] = userData[#"photo"];
}
if (userData[#"photo"]) {
user[#"photo"] = userData[#"photo"];
}
if (userData[#"homeCity"]) {
NSString *homecity = [[userData[#"homeCity"] componentsSeparatedByString:#","] firstObject];
user[#"location"] = homecity;
}
user[#"urls"] = #{
#"Foursquare" : [NSString stringWithFormat:#"https://foursquare.com/user/%#", userData[#"id"]],
};
dictionary[#"info"] = user;
return dictionary;
}
#end
I think it would be easier to show you just a screen shot of the errors and where they're arising in the code itself;
I would really appreciate some insight into where the problem lies. I'm not sure why many of the errors say use of undeclared identifiers, are the imported files not correct?
After trying to re-install the pod file as it was suggested a class hadn't been installed I still have the same problem. Here are screen shots of my podfile and the terminals output when installing the pods;
I just used the Cocoapods application rather than terminal. I got additional information when clicking install.
"[!] The dPicDid [Debug] target overrides the ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES build setting defined in `Pods/Target Support Files/Pods-dPicDid/Pods-dPicDid.debug.xcconfig'. This can lead to problems with the CocoaPods installation
[!] The dPicDid [Release] target overrides the ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES build setting defined in Pods/Target Support Files/Pods-dPicDid/Pods-dPicDid.release.xcconfig'. This can lead to problems with the CocoaPods installation
- Use the$(inherited)flag, or
- Remove the build settings from the target.
- Use the$(inherited)` flag, or
- Remove the build settings from the target.
The problem I meet is we can't get the managedObjectContext by this way:
[((MDAppDelegate*)appController) mainQueueContext] ;
Because the error message is:
'sharedApplication' is unavailable: not available on iOS (App
Extension) - Use view controller based solutions where appropriate
instead.
My QUESTION is:
Is there any existing example to help us connect to Core Data through Extension (Today/Watch)?
P.S. I have read following questions, none of them help. I just need an example:
App and Extension - Use Core data == error : sharedApplication()' is unavailable
WatchKit : 'sharedApplication' is unavailable: not available on iOS (App Extension) - Use view controller based solutions where appropriate instead
Use AppDelegate in today extension
We found and fix the problem now. The problem is caused by my misunderstanding of Core Data. We used to re-use tutorial's source code. When the system is work, we have no time to get deep understand of it.
The problem is we can't use Container App's managed object context. To fix it we use following code:
replace
[((MDAppDelegate*)appController) mainQueueContext] ;
to
[self mainQueueContext] ;
Then, add following...
- (NSManagedObjectContext *)mainQueueContext {
if (_mainQueueContext != nil) {
return _mainQueueContext;
}
_mainQueueContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSMainQueueConcurrencyType];
[_mainQueueContext setMergePolicy:NSMergeByPropertyStoreTrumpMergePolicy];
[_mainQueueContext setPersistentStoreCoordinator:self.persistentStoreCoordinator];
return _mainQueueContext; }
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
if (_persistentStoreCoordinator != nil) {
return _persistentStoreCoordinator;
}
NSURL *storeURL;
NSString *containerPath = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:#"group.<your project group ID>"].path;
NSString *sqlitePath = [NSString stringWithFormat:#"file://%#/%#", containerPath, #"<Your database file>.sqlite"];
storeURL = [NSURL URLWithString:sqlitePath];
NSError *error = nil;
_persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
NSDictionary *options = #{
NSMigratePersistentStoresAutomaticallyOption : #YES,
NSInferMappingModelAutomaticallyOption : #YES
};
if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil
URL:storeURL
options:options
error:&error]) {
abort();
}
NSDictionary *fileAttributes = [NSDictionary dictionaryWithObject:NSFileProtectionComplete forKey:NSFileProtectionKey];
if (![[NSFileManager defaultManager] setAttributes:fileAttributes ofItemAtPath:storeURL.path error:&error]) {
// Handle error
}
return _persistentStoreCoordinator;
}
- (NSManagedObjectModel *)managedObjectModel
{
if (_managedObjectModel != nil) {
return _managedObjectModel;
}
NSURL *modelURL;
NSString *containerPath = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:#"group.<your project group ID>"].path;
NSString *modelPath = [NSString stringWithFormat:#"file://%#/%#", containerPath, #"<Your database file>.momd"];
modelURL = [NSURL URLWithString:modelPath];
_managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
return _managedObjectModel;
}
Another Important issue is the Container App is still using the Core Data store located in application's Documents directory. The extension can't access it. So, we migrate the store to group shared folder using below lines:
NSString *directoryShared = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:#"group.<your project group ID>"].path;
NSString *storePathShared = [NSString stringWithFormat:#"file://%#/%#", directoryShared, #"<Your database file>.sqlite"];
NSURL *storeUrlShared = [NSURL URLWithString:storePathShared];
[_persistentStoreCoordinator migratePersistentStore:store
toURL:storeUrlShared
options:options
withType:NSSQLiteStoreType
error:&error];
if (error != nil) {
NSLog(#"Error when migration to groupd url %#, %#", error, [error userInfo]);
}
We just leave the original database alone, let the container app keep using it. there are some better way to achieve it. like:
Migrating NSPersistentStore from application sandbox to shared group container
I'm trying to create an IPSEC VPN connection in my iOS app.
My code for setting up the configuration looks like this:
-(void)setUpConfig
NEVPNManager *manager = [NEVPNManager sharedManager];
int status = manager.connection.status;
if (status == NEVPNStatusConnected) {
manager.connection stopVPNTunnel];
} else {
[manager loadFromPreferencesWithCompletionHandler:^(NSError *error) {
NSError *startError;
if (error) {
NSLog(#"Load config failed [%#]", error.localizedDescription);
return;
}
NEVPNProtocolIPSec *p = (NEVPNProtocolIPSec *)self.manager.protocol;
if (!p) {
p = [[NEVPNProtocolIPSec alloc] init];
}
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"base64_encoded_cert" ofType:#"txt"];
NSString *certBase64String = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:NULL];
NSString *certPassword = #"cert_import_password";
NSString *vpnUsername = #"myUsername";
NSString *vpnPassword = #"myPassword";
NSString *url = #"my.server.address";
// This saves my credentials to the keychain and returns a persistent keychain reference
NSData *passRef = [self addVPNCredentialsToKeychain:vpnUsername withPassword:vpnPassword];
p.username = vpnUsername;
p.authenticationMethod = NEVPNIKEAuthenticationMethodCertificate;
p.serverAddress = url;
p.passwordReference = passRef;
p.identityData = [NSData dataWithBase64EncodedString:certBase64String];
p.identityDataPassword = certPassword;
p.disconnectOnSleep = NO;
p.useExtendedAuthentication = YES;
[manager setProtocol:p];
[manager setOnDemandEnabled:NO];
[manager setLocalizedDescription:#"My VPN"];
[manager saveToPreferencesWithCompletionHandler:^(NSError *error) {
if(error) {
NSLog(#"Save error: %#", error);
} else {
NSLog(#"Saved!");
}
}];
}];
}
}
-(NSData*)addVPNCredentialsToKeychain:(NSString*)username withPassword:(NSString*)password
{
NSMutableDictionary *keychainItem = [NSMutableDictionary dictionary];
NSData *encodedIdentifier = [username dataUsingEncoding:NSUTF8StringEncoding];
keychainItem[(__bridge id)kSecClass] = (__bridge id)kSecClassGenericPassword;
keychainItem[(__bridge id)kSecAttrDescription] = #"A password used to authenticate on a VPN server";
keychainItem[(__bridge id)kSecAttrGeneric] = encodedIdentifier;
keychainItem[(__bridge id)kSecAttrAccount] = encodedIdentifier;
keychainItem[(__bridge id)kSecAttrService] = [[NSBundle mainBundle] bundleIdentifier];
keychainItem[(__bridge id)kSecMatchLimit] = (__bridge id)kSecMatchLimitOne;
keychainItem[(__bridge id)kSecReturnPersistentRef] = #YES;
CFTypeRef typeResult = nil;
OSStatus sts = SecItemCopyMatching((__bridge CFDictionaryRef)keychainItem, &typeResult);
NSLog(#"Error Code: %d", (int)sts);
if(sts == noErr) {
NSData *theReference = (__bridge NSData *)typeResult;
return theReference;
} else {
keychainItem[(__bridge id)kSecValueData] = [password dataUsingEncoding:NSUTF8StringEncoding]; //Our password
OSStatus sts = SecItemAdd((__bridge CFDictionaryRef)keychainItem, &typeResult);
NSLog(#"Error Code: %d", (int)sts);
NSData *theReference = (__bridge NSData *)(typeResult);
return theReference;
}
return nil;
}
I then attempt to open a VPN connection like so:
-(void)connect
NEVPNManager *manager = [NEVPNManager sharedManager];
[manager loadFromPreferencesWithCompletionHandler:^(NSError *error) {
NSError *startError;
[manager.connection startVPNTunnelAndReturnError:&startError];
if(startError) {
NSLog(#"Start error: %#", startError.localizedDescription);
}
}];
}
And this does work under most conditions. The problem I am experiencing is that after factory restoring a device (on iOS 8, of course), and attempting to go through this setup and connection, my profile installs just fine, but the VPN fails to connect. In fact, my interpretation is that it is failing to attempt to connect.
After factory restoring a device and attempting to connect using my method, the following shows up in the device logs:
<Notice>: NESMLegacySession[MyVPN:BB73C098-B22E-46D3-9491-2A6D9F559F8F]: Received a start command from VPNApp[256], but start was rejected
Going into the Settings app and attempting to manually toggle the VPN using the switch under "Bluetooth" results in the switch turning on for a split second and then immediately going by to off. In this case, the following log is produced:
<Warning>: -[VPNBundleController _vpnNetworkingIsDisabled]: Airplane mode: 0, WiFi Enabled: 1
In both cases, no error dialog is produced when the VPN fails to start connecting - just the logs.
I can get around this problem by navigating to Settings > General > VPN. Once having just gone to that page (i.e. Not toggling VPN there), I can then control VPN just fine. Even going to that page before a VPN configuration is even installed results in me being able to connect just fine after installing a configuration.
My goal is to be able to start the VPN connection without having to first go to that VPN page in Settings. Can anyone shed some light on the situation? It seems to me like I'm missing something to first enable VPN connections.
This appears because VPN configuration stayed disabled by default for initial VPN connection.
You must enable VPN before saveToPreferencesWithCompletionHandler.
[[NEVPNManager sharedManager] setEnabled:YES];
Example:
[[NEVPNManager sharedManager] loadFromPreferencesWithCompletionHandler: ^(NSError *error) {
if (error) {
NSLog(#"Load error: %#", error);
}
else {
// No errors! The rest of your codes goes here...
NEVPNProtocolIPSec *p = [[NEVPNProtocolIPSec alloc] init];
p.serverAddress = #"VPN SERVER ADDRESS";
p.authenticationMethod = NEVPNIKEAuthenticationMethodCertificate;
p.localIdentifier = #"Local identifier";
p.remoteIdentifier = #"Remote identifier";
p.useExtendedAuthentication = YES;
p.identityData = [NSData dataWithBase64EncodedString:certBase64String];;
p.identityDataPassword = #"identity password";
p.disconnectOnSleep = NO;
// Set protocol
[[NEVPNManager sharedManager] setProtocol:p];
// Set on demand
NSMutableArray *rules = [[NSMutableArray alloc] init];
NEOnDemandRuleConnect *connectRule = [NEOnDemandRuleConnect new];
[rules addObject:connectRule];
[[NEVPNManager sharedManager] setOnDemandRules:rules];
// Set localized description
[[NEVPNManager sharedManager] setLocalizedDescription:#"Description"];
// Enable VPN
[[NEVPNManager sharedManager] setEnabled:YES];
// Save to preference
[[NEVPNManager sharedManager] saveToPreferencesWithCompletionHandler: ^(NSError *error) {
NSLog(#"Save VPN to preference complete");
if (error) {
NSLog(#"Save to preference error: %#", error);
}
}];
}
}];
I am new to IOS development. At the moment I'm building an iPad app, what gets data back from the webservice, saves it in a core database and shows it in a tableview using NSFetchedResultController.
What is the problem. In IOS6 it al works like a charm, in IOS 5.0 it saves the data but not showing it in the tableview. It gives the following error.
CoreData: error: Serious application error. An exception was caught from the delegate of NSFetchedResultsController during a call to -controllerDidChangeContent:. The NIB data is invalid. with userInfo (null)
And when I test in IOS 5.1 it does not do anything. It does not shows data in a tableview and data is not being stored in core database.
Here is what I do. In my view did appear I check if there is a document I can use.
if (!self.genkDatabase) { // we'll create a default database if none is set
NSURL *url = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
url = [url URLByAppendingPathComponent:#"Default appGenk Database"];
self.genkDatabase = [[UIManagedDocument alloc] initWithFileURL:url]; // setter will create this for us on disk
}
Then it goes to my setter. And next in usedocument gonna check in which state my document is.
- (void)setGenkDatabase:(UIManagedDocument *)genkDatabase
{
if (_genkDatabase != genkDatabase) {
_genkDatabase = genkDatabase;
[self useDocument];
}
NSLog(#"Comes in the setdatabase methode.");
}
- (void)useDocument
{
NSLog(#"Comses in the use document");
if (![[NSFileManager defaultManager] fileExistsAtPath:[self.genkDatabase.fileURL path]]) {
// does not exist on disk, so create it
[self.genkDatabase saveToURL:self.genkDatabase.fileURL forSaveOperation:UIDocumentSaveForCreating completionHandler:^(BOOL success) {
NSLog(#"create");
[self setupFetchedResultsController];
NSLog(#"create 2");
[self fetchNewsIntoDocument:self.genkDatabase];
NSLog(#"create 3");
}];
} else if (self.genkDatabase.documentState == UIDocumentStateClosed) {
NSLog(#"closed news");
// exists on disk, but we need to open it
[self.genkDatabase openWithCompletionHandler:^(BOOL success) {
[self setupFetchedResultsController];
}];
} else if (self.genkDatabase.documentState == UIDocumentStateNormal) {
NSLog(#"normal");
// already open and ready to use
[self setupFetchedResultsController];
}
}
Finally I fetch my data in my document using the following function.
- (void)fetchNewsIntoDocument:(UIManagedDocument *)document
{
dispatch_queue_t fetchNews = dispatch_queue_create("news fetcher", NULL);
dispatch_async(fetchNews, ^{
NSArray *news = [GenkData getNews];
[document.managedObjectContext performBlock:^{
int newsId = 0;
for (NSDictionary *genkInfo in news) {
newsId++;
[News newsWithGenkInfo:genkInfo inManagedObjectContext:document.managedObjectContext withNewsId:newsId];
NSLog(#"news inserted");
}
[document saveToURL:document.fileURL forSaveOperation:UIDocumentSaveForOverwriting completionHandler:NULL];
}];
});
dispatch_release(fetchNews);
}
For the problem in IOS 5.0 is this my NSFetchResultController method.
- (void)setupFetchedResultsController // attaches an NSFetchRequest to this UITableViewController
{
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:#"News"];
request.sortDescriptors = [NSArray arrayWithObjects:[NSSortDescriptor sortDescriptorWithKey:#"date" ascending:YES],nil];
self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:request
managedObjectContext:self.genkDatabase.managedObjectContext
sectionNameKeyPath:nil
cacheName:nil];
}
I am doing this like the example from Paul Hegarty in stanford university. You can find the example Photomania over here.
Hope anyone can help me!
Kind regards
I've spent two days googling and reading the Bluetooth programming guide while trying to piece together a small Mac app that will retrieve images from a drop folder and send any new files to a predetermined device over Bluetooth. There doesn't seem to be many good examples available.
I'm at the point where I'm able to spawn the Bluetooth Service Browser and select the device and its OBEX service, establishing a service and creating a connection, but then nothing more happens. Could anyone please point me in the direction of/show me a simple example that would work?
AppDelegate source code enclosed. Thanks for reading!
#import "AppDelegate.h"
#implementation AppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
IOBluetoothServiceBrowserController *browser = [IOBluetoothServiceBrowserController serviceBrowserController:0];
[browser runModal];
//IOBluetoothSDPServiceRecord
IOBluetoothSDPServiceRecord *result = [[browser getResults] objectAtIndex:0];
[self describe:result];
if ([[result.device.name substringToIndex:8] isEqualToString:#"Polaroid"]) {
printer = result.device;
serviceRecord = result;
[self testPrint];
}
else {
NSLog(#"%# is not a valid device", result.device.name);
}
}
- (void) testPrint {
currentFilePath = #"/Users/oyvind/Desktop/_DSC8797.jpg";
[self sendFile:currentFilePath];
}
- (void) sendFile:(NSString *)filePath {
IOBluetoothOBEXSession *obexSession = [[IOBluetoothOBEXSession alloc] initWithSDPServiceRecord:serviceRecord];
if( obexSession != nil )
{
NSLog(#"OBEX Session Established");
OBEXFileTransferServices *fst = [OBEXFileTransferServices withOBEXSession:obexSession];
OBEXDelegate *obxd = [[OBEXDelegate alloc] init];
[obxd setFile:filePath];
[fst setDelegate:obxd];
OBEXError cnctResult = [fst connectToObjectPushService];
if( cnctResult != kIOReturnSuccess ) {
NSLog(#"Error creating connection");
return;
}
else {
NSLog(#"OBEX Session Created. Sending file: %#", filePath);
[fst sendFile:filePath];
[printer openConnection];
}
}
else {
NSLog(#"Error creating OBEX session");
NSLog(#"Error sending file");
}
}
#end
OK; here's what ultimately became the core parts of the functionality. The application I made was a sort of print server for Polaroid instant printers that would only accept images over Object Push.
First, ensure watched folder exists.
/*
Looks for a directory named PolaroidWatchFolder in the user's desktop directory
and creates it if it does not exist.
*/
- (void) ensureWatchedFolderExists {
NSFileManager *fileManager = [NSFileManager defaultManager];
NSURL *url = [NSURL URLWithString:#"PolaroidWatchFolder" relativeToURL:[[fileManager URLsForDirectory:NSDesktopDirectory inDomains:NSUserDomainMask] objectAtIndex:0]];
BOOL isDir;
if ([fileManager fileExistsAtPath:[url path] isDirectory:&isDir] && isDir) {
[self log:[NSString stringWithFormat:#"Watched folder exists at %#", [url absoluteURL]]];
watchFolderPath = url;
}
else {
NSError *theError = nil;
if (![fileManager createDirectoryAtURL:url withIntermediateDirectories:NO attributes:nil error:&theError]) {
[self log:[NSString stringWithFormat:#"Watched folder could not be created at %#", [url absoluteURL]]];
}
else {
watchFolderPath = url;
[self log:[NSString stringWithFormat:#"Watched folder created at %#", [url absoluteURL]]];
}
}
}
Then scan for available printers:
/*
Loops through all paired Bluetooth devices and retrieves OBEX Object Push service records
for each device who's name starts with "Polaroid".
*/
- (void) findPairedDevices {
NSArray *pairedDevices = [IOBluetoothDevice pairedDevices];
devicesTested = [NSMutableArray arrayWithCapacity:0];
for (IOBluetoothDevice *device in pairedDevices)
{
if ([self deviceQualifiesForAddOrRenew:device.name])
{
BluetoothPushDevice *pushDevice = [[BluetoothPushDevice new] initWithDevice:device];
if (pushDevice != nil)
{
[availableDevices addObject:pushDevice];
[pushDevice testConnection];
}
}
}
}
That last function call is to the BluetoothPushDevice's built-in method to test the connection. Here is the delegate handler for the response:
- (void) deviceStatusHandler: (NSNotification *)notification {
BluetoothPushDevice *device = [notification object];
NSString *status = [[notification userInfo] objectForKey:#"message"];
if ([devicesTested count] < [availableDevices count] && ![devicesTested containsObject:device.name]) {
[devicesTested addObject:device.name];
}
}
Upon server start, this method will run in response to a timer tick or manual scan:
- (void) checkWatchedFolder {
NSError *error = nil;
NSArray *properties = [NSArray arrayWithObjects: NSURLLocalizedNameKey, NSURLCreationDateKey, NSURLLocalizedTypeDescriptionKey, nil];
NSArray *files = [[NSFileManager defaultManager]
contentsOfDirectoryAtURL:watchFolderPath
includingPropertiesForKeys:properties
options:(NSDirectoryEnumerationSkipsHiddenFiles)
error:&error];
if (files == nil) {
[self log:#"Error reading watched folder"];
return;
}
if ([files count] > 0) {
int newFileCount = 0;
for (NSURL *url in files) {
if (![filesInTransit containsObject:[url path]]) {
NSLog(#"New file: %#", [url lastPathComponent]);
[self sendFile:[url path]];
newFileCount++;
}
}
}
}
When new files are found, ww first need to find a device that is not busy recieving a file of printing it:
/*
Loops through all discovered device service records and returns the a new OBEX session for
the first it finds that is not connected (meaning it is not currently in use, connections are
ad-hoc per print).
*/
- (BluetoothPushDevice*) getIdleDevice {
for (BluetoothPushDevice *device in availableDevices) {
if ([device.status isEqualToString:kBluetoothDeviceStatusReady]) {
return device;
}
}
return nil;
}
Then a file is sent with this method:
- (void) sendFile:(NSString *)filePath {
BluetoothPushDevice *device = [self getIdleDevice];
if( device != nil ) {
NSLog(#"%# is available", device.name);
if ([device sendFile:filePath]) {
[self log:[NSString stringWithFormat:#"Sending file: %#", filePath]];
[filesInTransit addObject:filePath];
}
else {
[self log:[NSString stringWithFormat:#"Error sending file: %#", filePath]];
}
}
else {
NSLog(#"No idle devices");
}
}
Upon transfer complete, this delegate method is called:
/*
Responds to BluetoothPushDevice's TransferComplete notification
*/
- (void) transferStatusHandler: (NSNotification *) notification {
NSString *status = [[notification userInfo] objectForKey:#"message"];
NSString *file = ((BluetoothPushDevice*)[notification object]).file;
if ([status isEqualToString:kBluetoothTransferStatusComplete]) {
if ([filesInTransit containsObject:file]) {
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error = nil;
[fileManager removeItemAtPath:file error:&error];
if (error != nil) {
[self log:[NSString stringWithFormat:#"**ERROR** File %# could not be deleted (%#)", file, error.description]];
}
[self log:[NSString stringWithFormat:#"File deleted: %#", file]];
[filesInTransit removeObject:file];
}
else {
[self log:[NSString stringWithFormat:#"**ERROR** filesInTransit array does not contain file %#", file]];
}
}
[self updateDeviceStatusDisplay];
}
I hope this helps someone!