Hi I'm trying to use core data to insert data using core data. I haven't been able to save my data. As my code stands right now the program crashes without a stack trace so I'm a little stuck
detailedViewController code
-(void) addobject{
if(self.isEditing == false){
MasterViewController *mvc = self.delegate;
mvc.managedObjectContext = self.managedObjectContext;
[mvc insertNewObject: self.txtUrlAddress.text : self.txtUrlName.text :
self.txtUrlImage.text];
}
}
MasterViewController code
-(void)insertNewObject: (NSString *) url : (NSString*) urlName : (NSString *) urlImage
{
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
NSEntityDescription *entity = [[self.fetchedResultsController fetchRequest] entity];
Event *urlDatabase = [NSEntityDescription insertNewObjectForEntityForName:[entity name] inManagedObjectContext:context];
urlDatabase.url = url;
urlDatabase.urlname = urlName;
urlDatabase.urlImage = urlImage;
// If appropriate, configure the new managed object.
// Normally you should use accessor methods, but using KVC here avoids the need to add a custom class to the template.
//[urlDatabase setValue:[NSDate date] forKey:#"urlname"];
// Save the context.
NSError *error = nil;
if (![context save:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
int count = [[self.fetchedResultsController sections] count];
NSLog([NSString stringWithFormat:#"Data base size is %d", count]);
}
Can anyone see the issue with my code?
Instead of
-(void)insertNewObject: (NSString *) url : (NSString*) urlName : (NSString *) urlImage
you should write
-(void)insertNewObject:(NSString *) url urlName: (NSString*) urlName urlImage: (NSString *) urlImage
The rest looks fine I think.. Solved this your problem?
Related
This is a question that appears to have been answered many times on Stack Overflow - but still it doesn't work for my use-case. Core Data mostly works fine. The problem comes when closing the document - at that point I need the Core Data to be reset, ready for the next Document to be loaded. What actually happens is that the next Document to be loaded gets loaded with all of its data, and all of the previous Documents data - and it doesn't reset until the Application is quit and reopened again.
I have an NSDocument based application which can load many different document types. Each document type is described in its own Class. Foo, for example, might be a really simple document type, small, text based, no problem to handle so it doesn't need a complex class to load it. Bar, on the other hand, is a vast complicated database many GB in size - and it doesn't make sense to load it all into memory.
My Bar class uses Core Data - it's the only one that needs to, and therefore the only one which contains this logic. I mention this because nearly every description on how to use Core Data puts the Core Data code in App Delegate - there might be a good reason for this!
In my Bar header I have my Core Data set up as follows:
#property (nonatomic, strong, readonly) NSManagedObjectModel *managedObjectModel;
#property (nonatomic, strong) NSPersistentStoreCoordinator *persistentStoreCoordinator;
#property (nonatomic, strong, readonly) NSManagedObjectContext *managedObjectContext;
#property (nonatomic, strong, readonly) NSDate *readStart;
And in my Bar .m I have the following:
- (NSURL *)dataStoreURL {
NSString *docDir = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];
//NSString* filename = [NSString stringWithFormat:#"%#.sql",[StringWangers generateUUIDString]];
NSString* filename = #"datastore.sql";
return [NSURL fileURLWithPath:[docDir stringByAppendingPathComponent:filename]];
}
- (NSManagedObjectModel *)managedObjectModel {
if (_managedObjectModel) {
return _managedObjectModel;
}
_managedObjectModel = [NSManagedObjectModel mergedModelFromBundles:nil];
return _managedObjectModel;
}
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator {
if (_persistentStoreCoordinator) {
return _persistentStoreCoordinator;
}
[NSFileManager.defaultManager removeItemAtURL:self.dataStoreURL error:nil]; // this isn't supposed to be persistent - clear out old crap
NSError *error = nil;
NSDictionary *options = #{NSMigratePersistentStoresAutomaticallyOption: #(YES), NSInferMappingModelAutomaticallyOption: #(YES)};
_persistentStoreCoordinator = [NSPersistentStoreCoordinator.alloc initWithManagedObjectModel:self.managedObjectModel];
if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil
URL:self.dataStoreURL
options:options
error:&error]) {
NSLog(#"Unresolved Core Data error with persistentStoreCoordinator: %#, %#", error, [error userInfo]);
}
return _persistentStoreCoordinator;
}
- (NSManagedObjectContext *)managedObjectContext {
if (_managedObjectContext) {
return _managedObjectContext;
}
if ([self persistentStoreCoordinator]) {
_managedObjectContext = [NSManagedObjectContext.alloc initWithConcurrencyType:NSMainQueueConcurrencyType];
[_managedObjectContext setPersistentStoreCoordinator:[self persistentStoreCoordinator]];
}
return _managedObjectContext;
}
I've tried many things to delete this pesky data - including, belt and braces, everything (which I really don't like doing because I'd like to understand what's going on - but I was desperate!) - this is the 'everything' state…
-(void)deinitialise {
#try {
NSLog(#"Deleting old core storage");
NSArray *allEntities = self.managedObjectModel.entities;
for (NSEntityDescription *entityDescription in allEntities) {
NSFetchRequest *fetchRequest = NSFetchRequest.new;
[fetchRequest setEntity:entityDescription];
fetchRequest.includesPropertyValues = NO;
fetchRequest.includesSubentities = NO;
NSLog(#"%#",fetchRequest);
NSError *error = nil;
NSArray *items;
if (self.managedObjectContext &&
fetchRequest &&
([fetchRequest.sortDescriptors isKindOfClass:NSArray.class] && fetchRequest.sortDescriptors.count > 0) &&
fetchRequest.predicate) {
items = [self.managedObjectContext executeFetchRequest:fetchRequest error:&error];
}
if (error) {
NSLog(#"Error requesting items from Core Data: %#", error.localizedDescription);
}
for (NSManagedObject *managedObject in items) {
[self.managedObjectContext deleteObject:managedObject];
[self.managedObjectContext save:&error];
if (error) {
NSLog(#"Error deleting items from Core Data: %#", error.localizedDescription);
}
}
}
}
#catch (NSException *exception) {
NSLog(#"Error deleting persistent storage - Exception: %#", exception);
}
NSError *error = nil;
NSArray* persistentStoreArray = self.persistentStoreCoordinator.persistentStores;
for (id store in persistentStoreArray) {
[self.persistentStoreCoordinator removePersistentStore:store error:&error];
if (error) {
NSLog(#"Error Removing Persistent Store: %#", error.localizedDescription);
}
NSString* storePath = [store URL].path;
NSLog(#"%#",storePath);
[NSFileManager.defaultManager removeItemAtPath:storePath error:&error];
if (error) {
NSLog(#"Error Deleting Persistent Store: %#", error.localizedDescription);
}
}
self.persistentStoreCoordinator = nil;
}
Interestingly, - (NSPersistentStoreCoordinator *)persistentStoreCoordinator only gets called the first time that my Bar class is called on document load, but every time I call my reinitialise class.
Hopefully this makes sense to someone - 'cos I'm bang out of ideas.
Thank you to everyone who posted suggestions. They were great avenues of investigation - but they all turned out to be incorrect for my particular use-case. In the event, all I had to do was this:
-(void)deinitialise {
[self.managedObjectContext reset];
}
I hope that this might help someone else who has this problem.
I'm working with Core Data and web service, I want to add my data to my table,
but I don't know how should I call them, would you please help me, since when I used this way it's not working.
Here is my method for update database in my HTTP class
- (void)updateLocalCardsDataBase:(NSArray*) cardsArray
{
//check if current user has cards in local database
NSManagedObjectContext* managedObjectContext = [(AppDelegate*) [[UIApplication sharedApplication] delegate] managedObjectContext];
for(NSDictionary *cardDic in cardsArray)
{
Card *card = [NSEntityDescription insertNewObjectForEntityForName:#"Card" inManagedObjectContext:managedObjectContext];
card.remote_id = [NSNumber numberWithInt:[[cardDic objectForKey:#"id"] intValue]];
card.stampNumber = [NSNumber numberWithInt:[[cardDic objectForKey:#"stampNumber"] intValue]];
card.createdAt = [NSDate dateWithTimeIntervalSince1970:[[cardDic objectForKey:#"createdAt"] intValue]];
[managedObjectContext lock];
NSError *error;
if (![managedObjectContext save:&error])
{
NSLog(#"Whoops, couldn't save: %#", [error localizedDescription]);
NSLog(#"Failed to save to data store: %#", [error localizedDescription]);
NSArray* detailedErrors = [[error userInfo] objectForKey:NSDetailedErrorsKey];
if(detailedErrors != nil && [detailedErrors count] > 0) {
for(NSError* detailedError in detailedErrors) {
NSLog(#" DetailedError: %#", [detailedError userInfo]);
}
}
else {
NSLog(#" %#", [error userInfo]);
}
}
[managedObjectContext unlock];
}
Here is my table:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
// NSManagedObjectContext* managedObjectContext = [(AppDelegate*) [[UIApplication sharedApplication] delegate] managedObjectContext];
static NSString *CellIdentifier = #"CardsCell";
CardCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil){
NSArray *objects = [[NSBundle mainBundle] loadNibNamed:#"CardCell" owner:nil options:nil];
for (id currentObject in objects)
{
if([currentObject isKindOfClass:[UITableViewCell class]])
{
cell = (CardCell *) currentObject;
break;
}
}
NSDictionary *f = [_cards objectAtIndex:indexPath.row];
cell.stampId.text = [f objectForKey:#"stampNumber"];
NSLog(#"%#fdssfdfddavds",[f objectForKey:#"stampNumber"]);
cell.createdAt.text = [f objectForKey:#"createdAt"];
cell.CardId.text = [f objectForKey:#"id"];
return cell;
}
Edit:
My problem is how I can show data in a UITableView
Before call [tableView reloadData], you need to get a data source first. You will get back an array of your data models, not an NSDictionary. You can place the my example method (or a variation that suits you best) where ever best suits your needs, but this one will not filter or sort the models, it will only get all of them. Also, I will place the method in your view controller that stores the table view:
-(NSArray*)getMycards {
NSManagedObjectContext *context = [(AppDelegate*) [[UIApplication sharedApplication] delegate] managedObjectContext];
NSEntityDescription *entityDescription = [NSEntityDescription entityForName:#"Card" inManagedObjectContext:context];
NSFetchRequest *request = [[[NSFetchRequest alloc] init] autorelease];
NSError *error;
[request setEntity:entityDescription];
NSArray *cards = [context executeFetchRequest:request error:&error];
// now check if there is an error and handle it appropriatelty
// I usually return 'nil' but you don't have if you don't want
if ( error != nil ) {
// investigate error
}
return cards;
}
I recommend creating a property #property NSArray *cards in the view controller where you place your table, it will be easier to manage. One assumption I have made (since I have no other information about your view controller, a property named 'tableView' is declared in your view controller's header file (#property UITableView *tableView;), adjust the naming as needed.
With the above method, when you want to populate your array before loading the table's data:
// you put this block of code anywhere in the view controller that also has your table view
// likely in 'viewDidLoad' or 'viewDidAppear'
// and/or anywhere else where it makes sense to reload the table
self.cards = [self getMyCards];
if ( self.cards.count > 0 )
[self.tableview reloadData];
else {
// maybe display an error
}
Now, your cellForRowAtIndexPath should look like
-(UITableViewCell*tableView:tableView cellForRowAtIndexPath {
UITbaleViewCell *cell = ...;
// creating the type of cell seems fine to me
.
.
.
// keep in mind I don't know the exact make up of your card model
// I don't know what the data types are, so you will have to adjust as necessary
Card *card = self.cards[indexPath.row];
cell.stampId.text = [[NSString alloc] initWithFormat:#"%#",card.stamp];
cell.createdAt.text = [[NSString alloc] initWithFormat:#"%#",card.createdAt];
// you might want format the date property better, this might end being a lot more than what you want
cell.CardId.text = [[NSString alloc] initWithFormat:#"%#",card.id];
return cell;
}
Core Data is extremely powerful, I highly recommend the Core Data overview, followed by the Core Data Programming Guide.
I'm developing an iOS app using Core Data. And I have a Log entity with one-to-many relationships with Audio, Photo entities, and one-to-one relationship with Status entity. The log also has text, longitude, latitude properties. I can create the log, change its properties, add status entity, these changes would display right, until I quit the App. All the changes would disappear, and I was looking at the sqlite database, all these changes were never persisted in the database. In the database, the status object will just be created, but not linked to the log object.
But if I add an audio or photo object into the log.audioSet or log.photoSet, the changes I made to log, including the changes to text or status, will suddenly be saved into the database.
So it seems the changes are only maintained in the NSManagedObjectContext, until a related one_to_many entity is added and the [[LTLogStore sharedStore] saveChanges] will suddenly start to work.
I am using a singleton to manage the NSManagedObjectContext. Any ideas?
I would post some code if it's relevant. Thanks.
UPDATE: I'm not sure these code is enough. But basically everything works, and displays, it just doesn't save to the database. I'm using the mogenerator to set the text and latitude, but since everything is in the context. I am not sure this is the code you might need.
CODE:
#interface LTLogStore : NSObject{
}
+ (LTLogStore *)sharedStore;
- (void)removeItem:(Log *)p;
- (Log *)createItem;
- (BOOL)saveChanges;
#property(nonatomic, strong) NSFetchedResultsController *resultsController;
#property(nonatomic, strong) NSManagedObjectModel *model;
#property(nonatomic, strong) NSManagedObjectContext *context;
#end
#implementation LTLogStore
#synthesize resultsController;
#synthesize context, model;
+ (LTLogStore *)sharedStore
{
static LTLogStore *sharedStore = nil;
if(!sharedStore){
sharedStore = [[super allocWithZone:nil] init];
}
return sharedStore;
}
+ (id)allocWithZone:(NSZone *)zone
{
return [self sharedStore];
}
- (id)init
{
self = [super init];
if(self) {
model = [NSManagedObjectModel mergedModelFromBundles:nil];
NSPersistentStoreCoordinator *psc =
[[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:model];
// Where does the SQLite file go?
NSString *path = [self itemArchivePath];
NSURL *storeURL = [NSURL fileURLWithPath:path];
NSError *error = nil;
if (![psc addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil
URL:storeURL
options:nil
error:&error]) {
[NSException raise:#"Open failed"
format:#"Reason: %#", [error localizedDescription]];
}
// Create the managed object context
context = [[NSManagedObjectContext alloc] init];
[context setPersistentStoreCoordinator:psc];
// The managed object context can manage undo, but we don't need it
[context setUndoManager:nil];
}
return self;
}
- (NSFetchedResultsController *)resultsController {
if (resultsController !=nil) {
return resultsController;
}
NSFetchRequest *request = [[NSFetchRequest alloc] init];
NSEntityDescription *e = [[model entitiesByName] objectForKey:#"Log"];
[request setEntity:e];
NSSortDescriptor *sd = [NSSortDescriptor
sortDescriptorWithKey:#"created_at"
ascending:NO];
[request setSortDescriptors:[NSArray arrayWithObject:sd]];
[request setReturnsObjectsAsFaults:NO];
NSFetchedResultsController *fetchedResultsController = [[NSFetchedResultsController alloc]
initWithFetchRequest:request
managedObjectContext:context
sectionNameKeyPath:nil cacheName:#"Root"];
NSError *error;
BOOL success = [fetchedResultsController performFetch:&error];
if (!success) {
//handle the error
}
return fetchedResultsController;
}
- (NSString *)itemArchivePath
{
NSArray *documentDirectories =
NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
// Get one and only document directory from that list
NSString *documentDirectory = [documentDirectories objectAtIndex:0];
NSString *storePath = [documentDirectory stringByAppendingPathComponent:#"store.data"];
return storePath;
}
- (BOOL)saveChanges
{
NSError *err = nil;
BOOL successful = [context save:&err];
NSLog(#"Saving changes to the database");
if (!successful) {
NSLog(#"Error saving: %#", [err localizedDescription]);
}
return successful;
}
- (void)removeItem:(Log *)l
{
[context deleteObject:l];
[self saveChanges];
}
- (Log *)createItem
{
Log *p = [NSEntityDescription insertNewObjectForEntityForName:#"Log"
inManagedObjectContext:context];
[self saveChanges];
return p;
}
#end
#interface Log : _Log {
}
//these two are some custom convenience methods for location attributes, but it does the work of setting the longitude and latitude value in the log object, but calling the [[LTLogStore sharedStore] saveChanges] still won't save it into the database.
-(CLLocation*)location;
-(void)setLocation:(CLLocation*)location;
//this all works
-(Audio*)newAudio;
-(Audio*)newAudioWithPath:(NSString*)audioPath;
//after calling this method, even the log.text changes will be saved to the database.
-(void)addAudioWithPath:(NSString*)audioPath;
-(void)removeAudio:(Audio*)audio;
#end
#import "Log.h"
#import "Audio.h"
#import "LTLogStore.h"
#implementation Log
-(CLLocation*)location{
if (!self.longitude || !self.latitude) {
return nil;
}
CLLocation *l = [[CLLocation alloc] initWithLatitude:[self.latitude doubleValue] longitude:[self.longitude doubleValue]];
return l;
}
-(void)setLocation:(CLLocation*)location{
if (location==nil) {
self.latitude = nil;
self.longitude = nil;
}
self.latitude = [NSNumber numberWithDouble: location.coordinate.latitude];
self.longitude = [NSNumber numberWithDouble:location.coordinate.longitude];
[[LTLogStore sharedStore] saveChanges];
}
-(Audio*)newAudio{
Audio *a = [Audio new];
a.log = self;
return a;
}
-(Audio*)newAudioWithPath:(NSString*)audioPath{
Audio *new = [self newAudio];
[new setKey:audioPath];
return new;
}
-(void)addAudioWithPath:(NSString*)audioPath{
Audio *new = [self newAudio];
[new setKey:audioPath];
[[LTLogStore sharedStore] saveChanges];
}
-(void)removeAudio:(Audio*)audio{
[self.audiosSet removeObject:audio];
[[[LTLogStore sharedStore] context] deleteObject:audio];
[[LTLogStore sharedStore] saveChanges];
}
#end
UPDATE:
Problem solved, see answer.
UPDATE QUESTION: Why is my overriding causing the problem? Can someone explain the cause behind the magic of Core Data or maybe KVO behind scene?
Problem solved, I overrode the willChangeValueForKey method in the Log class, which caused the problem, I thought the code is irrelevant. But it IS:
- (void)willChangeValueForKey:(NSString *)key{
//I added the following line to fix my problem
[super willChangeValueForKey:key];
//this is the original line, I want to have this
//because I want to have a isBlank property
//so I can see if the user modified the log
_isBlank = false;
//I tried to also add the following line to be safe.
//turns out this line is not needed, and it will make the problem occur again
//[super didChangeValueForKey:key];
}
I am first time asking question here, sorry, but I can not find similar one.
So, I need update data in Entity "City" attribute - #"name".
for Example in my Core Data I already have #"New York", #"Boston".
And by parsing XML I have NSMutableArray *Cities = (#"New York", #"Boston", #"Los Angeles", #"Washington");
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath
{
NSString *attributeString = #"name";
NSManagedObject *object = [self.fetchedResultsController objectAtIndexPath:indexPath];
//save to the TableView
cell.textLabel.text = [[object valueForKey:attributeString] description];
if ((indexPath.row + 1) == numberOfSectionsInTableView && (self.isParsingDone))
[self.insertNewObjectToCities:nil];
//When coredata updating - tableView is also updating automatically
//Here is just adding new data, but I do not know how to update
- (void)insertNewObjectToCities_translation:(id)sender
{
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
NSEntityDescription *entity = [[self.fetchedResultsController fetchRequest] entity];
NSManagedObject *newManagedObject = [NSEntityDescription insertNewObjectForEntityForName:[entity name] inManagedObjectContext:context];
NSString *attributeString = #"name";
if (![[self.parseCities.Cities objectAtIndex:i] isEqualToString:[newManagedObject valueForKey:attributeString]])
{
[newManagedObject setValue:[self.parseCities.Cities objectAtIndex:i] forKey:attributeString];
NSLog(#"OBBB %#", [self.parseCities.Cities objectAtIndex:i]);
NSLog(#"dessss %#", [[newManagedObject valueForKey:attributeString] description]);
i++;
if (i==[self.parseCities.Cities count])
{
i = 0;
return;
}
else
{
NSLog(#"valueForKey %#", [newManagedObject valueForKey:attributeString]);
[self insertNewObjectToCities_translation:nil];
}
}
else
{
NSLog(#"else");
return;
}
// Save the context.
NSError *error = nil;
if (![context save:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
}
To update a managed object, you first need to fetch it, make any changes to the fields in the fetched NSManagedObject, and then save the context you used to fetch the object. If you call insertNewObjectForEntityForName again, it will insert a new managed object every time, even if it already exists in Core Data.
It's quite slow to fetch a single object every time you need to check and see if a new one needs to be added. You might want to cache the objects you currently have loaded (or their unique identifying field) into an NSArray or NSSet so you can check that for membership, instead.
So, for the past two days or so I've been struggling with something that should honestly be a simple task. Here's a little introduction on what I'm trying to achieve.
What I'm doing is utilising a web service of my own, sending a request and parsing the returned JSON with SBJSON. What I know want to accomplish with this parsed JSON is to insert it into Core Data.
I have built a object model already which looks like the following:
#import <CoreData/CoreData.h>
#interface Event : NSManagedObject
{
}
#property (nonatomic, retain) NSString * summary;
#property (nonatomic, retain) NSString * content;
#property (nonatomic, retain) NSDate * updated;
#property (nonatomic, retain) NSString * title;
#property (nonatomic, retain) NSDate * created;
#property (nonatomic, retain) NSString * ID;
#end
These are all built in regards to what is being parsed, I think I may have to change the NSDate's to NSStrings at a later date, but for now they are NSDates.
So, now to show you what is being parsed. The JSON returns the following.
[{"note id":"525","note title":"Car","note summary":"","note content":"","note created":"1297130179","note_updated":"1297233954"},
{"note id":"252","note title":"Premium Users","note summary":"","note content":"","note created":"1296046367","note_updated":"1296699888"},
{"note id":"253","note title":"Welcome!","note summary":"","note content":"","note created":"1296046367","note_updated":"1296561871"}]
What I am wanting to do is create an entity "Event" and each entity stores the respective values for that event. Easy, right? Obviously not for me.
What I have tried...
NotaciousAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
NSManagedObjectContext *context = [appDelegate managedObjectContext];
NSManagedObject *newNote;
newNote = [NSEntityDescription insertNewObjectForEntityForName:#"Event" inManagedObjectContext:context];
[newNote setValue:[object valueForKey:#"note title"] forKey:#"title"];
[newNote setValue:[object valueForKey:#"note summary"] forKey:#"summary"];
[newNote setValue:[object valueForKey:#"note updated"] forKey:#"updated"];
NSError *error;
[context save:&error];
Yet this returns an error.
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Unacceptable type of value for attribute: property = "title"; desired type = NSString; given type = __NSArrayI; value = (
Car,
"Premium Users",
"Welcome!"
).'
Any ideas or code samples would help. I really need to get this fixed, all dependent on how this is being stored.
EDIT
Here's how we build the request and parse the string returned.
NSDictionary *params = [NSDictionary dictionaryWithObject:api_key forKey:#"api_key"];
[[LRResty client] get:#"http://notacio.us/api/note" parameters:params withBlock:^(LRRestyResponse *response){
if(response.status == 200) {
NSLog(#"Pulling the users notes \n%#", [response asString]);
// Create SBJSON object to parse JSON
SBJSON *parser = [[SBJSON alloc] init];
// parse the JSON string into an object - assuming [response asString] is a NSString of JSON data
NSDictionary *object = [parser objectWithString:[response asString] error:nil];
EDIT
Just thought I'd let people know that I'm currently using the Resty RESTful framework to make my calls to my own API. I thought this was the best alternative and easiest way for myself to build a wrapper for it. Here is the full request.
Resty documentation.
-(void)pullNotes {
NSDictionary *params = [NSDictionary dictionaryWithObject:api_key forKey:#"api_key"];
[[LRResty client] get:url parameters:params withBlock:^(LRRestyResponse *response){
if(response.status == 200) {
NSLog(#"Pulling the users notes \n%#", [response asString]);
// Create SBJSON object to parse JSON
SBJSON *parser = [[SBJSON alloc] init];
// parse the JSON string into an object - assuming [response asString] is a NSString of JSON data
NSDictionary *object = [parser objectWithString:[response asString] error:nil];
NotaciousAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
NSManagedObjectContext *context = [appDelegate managedObjectContext];
NSManagedObject *newNote;
newNote = [NSEntityDescription insertNewObjectForEntityForName:#"Event" inManagedObjectContext:context];
[newNote setValue:[object valueForKey:#"note title"] forKey:#"title"];
[newNote setValue:[object valueForKey:#"note summary"] forKey:#"summary"];
[newNote setValue:[object valueForKey:#"note updated"] forKey:#"updated"];
NSError *error;
[context save:&error];
}
if (response.status == 404) {
NSLog(#"FAIL\n%#", [response asString]);
}
}];
}
EDIT
So, now that I have fixed the JSON issue and am grabbing the individual strings and such from each array, I'm having issues storing the parsed strings into Core Data.
I'll show you what I currently have.
[newNote ] is the name given to the Core Data entity in the header file of the following.
-(void)pullNotes {
UIApplication *app = [UIApplication alloc];
app.networkActivityIndicatorVisible = YES;
NSDictionary *params = [NSDictionary dictionaryWithObject:api_key forKey:#"api_key"];
[[LRResty client] get:#"http://notacio.us/api/note" parameters:params withBlock:^(LRRestyResponse *response){
if(response.status == 200) {
NSLog(#"Pulling the users notes \n%#", [response asString]);
// Create SBJSON object to parse JSON
SBJSON *parser = [[SBJSON alloc] init];
// parse the JSON string into an object - assuming [response asString] is a NSString of JSON data
NSDictionary *object = [parser objectWithString:[response asString] error:nil];
NSArray *notes = [object valueForKey:#"result"];
for (NSDictionary *singleNote in notes){
// newNote.created = [singleNote objectForKey:#"note created"]; Need to work on parsing these properly...
// newNote.updated = [singleNote objectForKey:#"note updated"]; Need to work on parsing these properly...
NSString *notetitle = [singleNote objectForKey:#"note title"];
NSString *notesummary = [singleNote objectForKey:#"note summary"];
NSString *noteid = [singleNote objectForKey:#"note id"];
NSString *notecontent = [singleNote objectForKey:#"note content"];
// NSDate *createdDate =
// NSDate *updatedDate =
// If appropriate, configure the new managed object.
[newNote setValue:notetitle forKey:#"title"];
[newNote setValue:notesummary forKey:#"summary"];
[newNote setValue:noteid forKey:#"ID"];
[newNote setValue:notecontent forKey:#"content"];
NSLog(#"value is %#", notetitle);
NSError *error = nil;
if (![newNote.managedObjectContext save:&error]) {
/*
Replace this implementation with code to handle the error appropriately.
abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. If it is not possible to recover from the error, display an alert panel that instructs the user to quit the application by pressing the Home button.
*/
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
[tableView reloadData];
app.networkActivityIndicatorVisible = NO;
}
}
if (response.status == 404) {
NSLog(#"FAIL\n%#", [response asString]);
app.networkActivityIndicatorVisible = NO;
}
}];
}
#end
However, running this code doesn't actually store the strings into the Core Data entity. As you can see it isn't finalised, a lot of commented code, but the basis is there. ANYWAY, I'm curious as to whether or not it is how I actually implement this in the pulling of the notes itself from the RootViewController...
In viewDidLoad() I'm calling the following...
ntIndex = [IndexNotes alloc];
ntIndex.api_key = api_key;
ntIndex.tableView = self.tableView;
[ntIndex pullNotes];
[ntIndex release];
[self.tableView reloadData];
}
Any help would be great, I'd love to hear what others think the issue is. I don't get any errors with the above code, just nothing is inserted into the Core Data and in turn isn't displayed in my UITableView in RootViewController...
The first thing I would do is log what this line returns:
[object valueForKey:#"note title"]
You'll find it's not the string you're expecting, but is an array of note titles.
eg:
NSLog(#"value is %#", [object valueForKey:#"note title"]);
Then you'll either need to fix your JSON or change the way you parse it.
Edit:
So when I say fix your JSON, I'm no expert, but I think it should look like this:
{"result":[{"note id":"525","note title":"Car","note summary":"","note content":"","note created":"1297130179","note_updated":"1297233954"}, {"note id":"252","note title":"Premium Users","note summary":"","note content":"","note created":"1296046367","note_updated":"1296699888"}, {"note id":"253","note title":"Welcome!","note summary":"","note content":"","note created":"1296046367","note_updated":"1296561871"}]}
Then:
NSDictionary *object = [parser objectWithString:[response asString] error:nil];
NSArray notes = [object valueForKey:#"result"];
for (NSDictionary *singleNote in notes){
[singleNote objectForKey:"note title"] //this gives you the title of the current note your on
}
It's to do with the fact [object valueForKey:#"note title"] is returning an array.
You'll like want to insert something more like [[object valueForKey:#"note title"] objectAtIndex:1] to take an object out of the array. However working out what index you want to insert from the title array is the hardest part.
Tim
EDIT:
Having looked into some others responses its apparent it's returning all the titles in one object. There's something either incredibly funky going on with your JSON. A way around this would be to possibly for loop over your results set from your JSON request and using the index from this loop to insert the correct title.
eg:
int count;
for (count = 0; count < [[object valueForKey:#"note title"] count]; count++)
{
// Do your other insert stuff here
[newNote setValue:[[object valueForKey:#"note title"] objectAtIndex:count] forKey:#"title"];
}
again this is just a dirty example of what you could possibly do so solve this problem.