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  • Tableview with sections managed by fetched results controller

    - by Matthes
    Hi, I'm quite new to CoreData and need help with one issue. I have tableview which simply lists cities stored in SQLite db. City is defined by "cityId" and "name" attributes. Data are fetched using NSFetchedResultsController and everything works fine except that I can't figure out how to make FetchedResultsController to group cities by first letter of city names. When I supply "name" for sectionNameKeyPath argument of initWithFetchRequest:managedObjectContext:sectionNameKeyPath:cacheName: method, it creates section for each city, which is obviously something I don't want. I can't figure out how to create an expression which would make it work in way I need. thanks for any tips and/or advices on this Matthes

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  • Stepping thru a plist to get at info

    - by cannyboy
    If I've got a plist set up like this Key Type Value Root Array Item 0 Dictionary -Title String Part One -Description String Welcome to part one. Have fun Item 1 Dictionary -Title String Part Two -Description String Welcome to part two. Fun too. Item 2 Dictionary -Title String Part Three -Description String Welcome to part three. It's free Item 3 Dictionary -Title String Part Four -Description String It's part four. No more How would I step thru to put all the titles in one array, and all the descriptions into another?

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  • UITableView Reload Data

    - by william-hu
    Hi, i used UITableView to show the info which was get for server. - (void)viewWillAppear:(BOOL)animated { //Create connection } Then i put the received data into array : NSSArray *dataFromServer: Then i want to show the data on each cell (some NSString object). As the connection was release, i call [self.tableView reloadData] , but cant work. So i'd like to know, how to make this? It means cellForRowAtIndexPath: has nothing at beginning, but after few seconds, shows something. Thank you so much!

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  • Can I access views when drawn in the drawRect method?

    - by GianPac
    When creating the content view of a tableViewCell, I used the drawInRect:withFont, drawAtPoint... and others, inside drawRect: since all I needed was to lay some text. Turns out, part of the text drawn need to be clickable URLs. So I decided to create a UIWebView and insert it into my drawRect. Everything seems to be laid out fine, the problem is that interaction with the UIWebView is not happening. I tried enabling the interaction, did not work. I want to know, since with drawRect: I am drawing to the current graphics context, there is anything I can do to have my subviews interact with the user? here is some of my code I use inside the UITableViewCell class. -(void) drawRect:(CGRect)rect{ NSString *comment = @"something"; [comment drawAtPoint:point forWidth:195 withFont:someFont lineBreakMode:UILineBreakModeMiddleTruncation]; NSString *anotherCommentWithURL = @"this comment has a URL http://twtr.us"; UIWebView *webView = [[UIWebView alloc] initWithFrame:someFrame]; webView.delegate = self; webView.text = anotherCommentWithURL; [self addSubView:webView]; [webView release]; } As I said, the view draws fine, but there is no interaction with the webView from the outside. the URL gets embedded into HTML and should be clickable. It is not. I got it working on another view, but on that one I lay the views. Any ideas?

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  • Detect and handle, or override, clicks on a navigation bar

    - by Henrik Erlandsson
    I have an app where I've pushed two items onto the navigation bar. The top item, which ends up as a 'back' button, should have the function to jump all the way back to the start page, which is a list of web news. The other one simply displays a logo. The boss wants a navigation bar look and feel but with a simple function, so the user can click around the news site, but always be able to jump to the news list page with just the one click. Is the only option to create a fixed navbar with two items in IB, so that I can connect an outlet to the clickable item - or is there some way to intercept clicks to the navbar to make a requestURL? touchesBegan or touchUpInside would be fine, but I've found no way of implementing that so far. It's okay if the whole navbar is clickable, I just need some hint how to make it happen. Add a transparent UIlabel on top and detect clicks for that, maybe? A bonus would be to hide the item in the 'back' position without popping it from the stack.

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  • Memory Allocation increases in didSelectRowAtIndexPath

    - by mongeta
    Hello, I'm testing my App and in a very simple view, each time a tap on a UITableView row, my allocation overall bytes get higher and higher and never go downs. I don't have any special code there, so I created a new project from scratch with a very simple view, force one section and just three rows. In the didSelectRowAtIndexPath code do nothing, and fire it with instruments and memory allocation and, the memory goes up with every cell selection ... Is this normal behaviour ? thanks, regards, m.

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  • CoreData could not fulfill a fault when adding new attribute

    - by cagreen
    I am receiving a "CoreData could not fulfill a fault for ..." error message when trying to access a new attribute in a new data model. If I work with new data I'm ok, but when I attempt to read existing data I get the error. Do I need to handle the entity differently myself if the attribute isn't in my original data? I was under the impression that Core Data could handle this for me. My new attribute is marked as optional with a default value. I have created a new .xcdatamodel (and set it to be the current version) and updated my NSPersistentStoreCoordinator initialization to take advantage of the lightweight migration as follows: NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption, [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil]; NSError *error = nil; persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]]; if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl options:options error:&error]) { NSLog(@"Unresolved error %@, %@", error, [error userInfo]); abort(); } Any help is appreciated.

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  • UIActivityIndicator not working properly?

    - by medma
    Hello frends, I have a problem regarding UIActivityIndicator. I applied "[spinner startAnimating]" at the IBAction on a button and then doing some process. After the process activityindicator should be stopped and then navigate to another view. But the activity indicator does not appear. When I remove the line "[spinner stopAnimating]" then the indicator appears but not at the instant button is pressed. It appears just before the other view loads, and apparently does not appear, I mean it does not appear but if we see very carefully then only it appears for an instant. Thanx in advance for any answer.

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  • Problem when subClassing NSDate

    - by iFloh
    Hi, I first time tried to subClassed an NSDate to give it 2 methods that I need. Compiles fine, but in runtime I try to access it I get an error. Lets say I just want the current date which is unmodified in the subClass: [myNSDate date]; I get the error -[NSDate initWithTimeIntervalSinceReferenceDate:]: method only defined for abstract class. Define -[myNSDate initWithTimeIntervalSinceReferenceDate:]! what is different?

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  • Tab bar application with UINavigation Controller MOC not being retained.

    - by iamsmug
    I created a tab bar application from the template and added a navigation controller to one of the tabs. I have already created this app from the navigation app template already and is working. The reason I am doing it this way is because I need to add a tab bar and thought it would be easier starting by using the tab bar project template and adding the nav controller to it rather than the other way round. I have copied the data model over from the other project and added the relevant code to where it should be. The problem I am having is passing the moc from the app delegate to the tab with the nav controller on. Here is a snippet from my applicationDidFinishLaunching method in my app delegate: - (void)applicationDidFinishLaunching:(UIApplication *)application { [self createEditableCopyOfDatabaseIfNeeded]; Top_BananaTableViewController *top_BananaTableViewController = (Top_BananaTableViewController *)[navigationController topViewController]; top_BananaTableViewController.managedObjectContext = self.managedObjectContext; // Add the tab bar controller's current view as a subview of the window [window addSubview:tabBarController.view]; [window makeKeyAndVisible]; } Everything seems fine here but when it comes to the fetchedResultsController on my nav controller view it bombs out with: '+entityForName: could not locate an NSManagedObjectModel for entity name 'cards'' When I checked what was set to my managedObjectContext on that view it was null. I don't know why or where it is loosing it's setting. Please help.

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  • How to get cell text based on indexPath?

    - by Sheehan Alam
    I have a UITabBarController with more than 5 UITabBarItems so the moreNavigationController is available. In my UITabBarController Delegate I do the following: - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { //do some stuff //... UITableView *moreView = (UITableView *)self.tabBarController.moreNavigationController.topViewController.view; moreView.delegate = self; } I want to implement a UITableViewDelegate so I can capture the row that was selected, set a custom view property and then push the view controller: - (void)tableView:(UITableView *)tblView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { //how can I get the text of the cell here? } I need to get the text of a cell when the user taps on a row. How can I accomplish this?

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  • Can get members, but not count of NSMutableArray

    - by Curyous
    I'm filling an NSMutableArray from a CoreData call. I can get the first object, but when I try to get the count, the app crashes with Program received signal: “EXC_BAD_ACCESS”. How can I get the count? Here's the relevant code - I've put a comment on the line where it crashes. - (void)viewDidLoad { [super viewDidLoad]; managedObjectContext = [[MySingleton sharedInstance] managedObjectContext]; if (managedObjectContext != nil) { charactersRequest = [[NSFetchRequest alloc] init]; charactersEntity = [NSEntityDescription entityForName:@"Character" inManagedObjectContext:managedObjectContext]; [charactersEntity retain]; [charactersRequest setEntity:charactersEntity]; [charactersRequest retain]; NSError *error; characters = [[managedObjectContext executeFetchRequest:charactersRequest error:&error] mutableCopy]; if (characters == nil) { NSLog(@"Did not get results for characters: %@", error.localizedDescription); } else { [characters retain]; NSLog(@"Found some character(s)."); Character* character = (Character *)[characters objectAtIndex:0]; NSLog(@"Name of first one: %@", character.name); NSLog(@"Found %@ character(s).", characters.count); // Crashes on this line with - Program received signal: “EXC_BAD_ACCESS”. } } } And previous declarations from the header file: @interface CrowdViewController : UITableViewController { NSManagedObjectContext *managedObjectContext; NSFetchRequest *charactersRequest; NSEntityDescription *charactersEntity; NSMutableArray *characters; } I'm a bit perplexed and would really appreciate finding out what is going on.

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  • Reason for getting error in Reverse Geocoder Delegate method in the morning times.

    - by Srilakshmi
    - (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFailWithError:(NSError *)error { NSLog(@"reverseGeocoder:%@ didFailWithError:%@", geocoder, error); } This method is getting called in morning times and it is not showing the placemark while running the application in simulator. From Afternoon it is showing the placemark as "Cupertino". Will you give me the reason for not getting the placeMark at morning times?

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  • How can I hook up an IBAction method to a plain view for a touch up event?

    - by Thanks
    I have created a blank new view-based application project in Xcode. It generated a myProjectViewController and an nib for it. In that nib for that view controller, there is just one view. I wanted to test some event handling stuff and created an -(IBAction) method that will just log a "hello world" when I touch the view. But for some reason, IB doesn't give me a chance to hook up the action. What am I doing wrong there? I also tried to put a UIView as subview there. When I drag from that to File's Owner (whoose class is the myProjectViewController, where I have the IBAction in the header), doesn't even mention the IBAction. But it actually should, right?

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  • UITextView cut problem !

    - by Mc.Lover
    Hi , i have problem with cut some text from UITextView , i idon't understand how can implement Cut , for example copy or paste it's like this : -(IBAction)copy { NSString *copyString = [[NSString alloc] initWithFormat:@"%@",[textPad text]]; UIPasteboard *pb = [UIPasteboard generalPasteboard]; [pb setString:copyString]; } -(IBAction)paste { UIPasteboard *pb = [UIPasteboard generalPasteboard]; textPad.text = [pb string]; } but about cut ! thank you ,

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  • UIViewController is popped from view stack and NSURLConnection crashes the application

    - by rickharrison
    I am pushing a UIViewController onto a UINavigationController. This view controller immediately starts a download of an xml feed and then parses it. However, if you hit the back button before it is done downloading, and crashes with EXC_BAD_ACCESS. The line that is crashing it is in parserDidEndDocument and is this line: if (self.delegate && [self.delegate conformsToProtocol:@protocol(ModelDelegate)]) [self.delegate modelDidFinishParsing:self]; I assume it is crashing because it is trying to access self.delegate which is not assigned anymore. How do I get around this? Also, I would release the model object in the modelDidFinishParsing method. How would I release this model if it never reaches this method.

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  • Method in RootViewController not Storing Array

    - by Antonio
    I have an array initialized in my RootViewController and a method that addsObjects to an array. I created a RootViewController object in my SecondViewController. The method runs (outputs a message) but it doesn't add anything to the array, and the array seems empty. Code is below, any suggestions? RootViewController.h #import "RootViewController.h" #import "SecondViewController.h" @implementation RootViewController - (void)viewDidLoad { [super viewDidLoad]; myArray2 = [[NSMutableArray alloc] init]; NSLog(@"View was loaded"); } -(void)addToArray2{ NSLog(@"Array triggered from SecondViewController"); [myArray2 addObject:@"Test"]; [self showArray2]; } -(void)showArray2{ NSLog(@"Array Count: %d", [myArray2 count]); } -(IBAction)switchViews{ SecondViewController *screen = [[SecondViewController alloc] initWithNibName:nil bundle:nil]; screen.modalTransitionStyle = UIModalTransitionStyleCoverVertical; [self presentModalViewController:screen animated:YES]; [screen release]; } SecondViewController.m #import "SecondViewController.h" #import "RootViewController.h" @implementation SecondViewController -(IBAction)addToArray{ RootViewController *object = [[RootViewController alloc] init]; [object addToArray2]; } -(IBAction)switchBack{ [self dismissModalViewControllerAnimated:YES]; } EDIT***** With Matt's code I got the following error: " expected specifier-qualifier-list before 'RootViewController' "

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  • Using NSPredicate to filter on both Core attribute and entity

    - by Ben Thompson
    I have two entities in core data (call them entityOne and entityTwo). I have a entityOne<---entityTwo relationship between them. I am now trying to code an NSPredicate to fetch entityTwo objects on the following basis: Fetch entityTwo objects that have a relationship with a specified entityOne object. Filter out those entityTwo objects which have no value for one of their attributes. I am best doing both of these in an NSPredicate or is there a better way? I am trying the following: NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(attribute <> "") AND (relationship == entityOne"]; [request setPredicate:predicate]; Any pointers on coding great fully received.

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  • How to create a formatted localized string?

    - by mystify
    I have a localized string which needs to take a few variables. However, in localization it is important that the order of the variables can change from language to language. So this is not a good idea: NSString *text = NSLocalizedString(@"My birthday is at %@ %@ in %@", nil); In some languages some words come before others, while in others it's reverse. I lack of an good example at the moment. How would I provide NAMED variables in a formatted string? Is there any way to do it without some heavy self-made string replacements? Even some numbered variables like {%@1}, {%@2}, and so on would be sufficient... is there a solution?

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  • UILabel not changing when method called

    - by LyonJTill
    - (IBAction)restoreUserDefaults { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; if([defaults objectForKey:@"Exam Name"] == nil) { examName = [[NSString alloc] initWithString:@"Name"]; } else { examName = [[NSString alloc] initWithString:[defaults objectForKey:@"Exam Name"]]; } [examNameLabel setText:[NSString stringWithFormat:@"%@",examName]]; } Hey all, Basically above is the method that is being called when one ViewController is being close and another is being opened the problem is, is that the UILabel in the new ViewController isn't changing to the value i need it to? Any ideas? Regards Lyon J Till

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  • Releasing Autoreleasepool crashes on iOS 4.0 (and only on 4.0)

    - by samsam
    Hi there. I'm wondering what could cause this. I have several methods in my code that i call using performSelectorInBackground. Within each of these methods i have an Autoreleasepool that is being alloced/initialized at the beginning and released at the end of the method. this perfectly works on iOS 3.1.3 / 3.2 / 4.2 / 4.2.1 but it fataly crashes on iOS 4.0 with a EXC_BAD_ACCESS Exception that happens after calling [myPool release]. After I noticed this strange behaviour I was thinking about rewriting portions of my code and to make my app "less parallel" in case that the client os is 4.0. After I did that, the next point where the app crashed was within the ReachabilityCallback-Method from Apples Reachability "Framework". well, now I'm not quite sure what to do. The things i do within my threaded methods is pretty simple xml parsing (no cocoa calls or stuff that would affect the UI). After each method finishes it posts a notification which the coordinating-thread listens to and once all the parallelized methods have finished, the coordinating thread calls viewcontrollers etc... I have absolutely no clue what could cause this weird behaviour. Especially because Apples Code fails as well. any help is greatly appreciated! thanks, sam

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