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  • Question about memory usage

    - by sudo rm -rf
    Hi there. I have the following method: +(NSMutableDictionary *)getTime:(float)lat :(float)lon { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init]; [dictionary setObject:hour forKey:@"hour"]; [dictionary setObject:minute forKey:@"minute"]; [dictionary setObject:ampm forKey:@"ampm"]; return dictionary; } A lot of the method is chopped off, so I think I need the pool for some other stuff in the method. Here's my question. I know that I need to release the following objects: [dictionary release]; [pool release]; However, I can't release the dictionary before I return it, but as soon as I return it the rest of the method isn't performed. What should I do?

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  • How do I reset the state of a view inside a tabbar?

    - by ABeanSits
    Hello CocoaTouch-Experts! This is a fairly straightforward question though my Googling session gave me nothing. How do I reset the state of a view hierarchy located in a tabbar programmatically? The behavior I want to replicate is when the user tapps on a tab twice. This causes the view located under that tab to return to it's initial state. The tab is "owned" by a UINavigationController and when the user reaches a certain point in the view hierarchy there is a button which I want to connect this behavior to. All my attempts have failed except calling on a method in AppDelegate which kills the view and adds it back to the UITabBarController again. But this does not feel like the right way to go. Thanks in advance. Best regards //Abeansits

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  • Change TabBarController in detail view

    - by Antriel
    So I have a TabBarController with 2 views. One of the views is a TableView in navigationController. When user selects a row I push a detail view there. I want this detail view to have its own TabBarController different from the former one. So basically the question is if I can push a view on top different view with different TabBarController, but using navigationController not as a modal view.

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  • NSXMLParser values not being retained.

    - by user574947
    This is similar to my previous question. I didn't get an answer, maybe by changing the question I might get an answer. Here is my parsing code: -(void) parser:(NSXMLParser *) parser didStartElement:(NSString *) elementName namespaceURI:(NSString *) namespaceURI qualifiedName:(NSString *) qName attributes:(NSDictionary *) attributeDict { if ([elementName isEqualToString:kimgurl] || [elementName isEqualToString:kone_x] || [elementName isEqualToString:kone_y] || [elementName isEqualToString:kone_radius] || [elementName isEqualToString:ktwo_x] || [elementName isEqualToString:ktwo_y] || [elementName isEqualToString:ktwo_radius]) { elementFound = YES; theItems = [[Items alloc] init]; } } - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { if([elementName isEqualToString:kimgurl]) { theItems.imageURL = self.currentValue; [self.currentValue setString:@""]; } else if([elementName isEqualToString:kone_x]) { theItems.iOne_X = self.currentValue; [self.currentValue setString:@""]; } else if([elementName isEqualToString:kone_y]) { theItems.iOne_Y = self.currentValue; [self.currentValue setString:@""]; } else if([elementName isEqualToString:kone_radius]) { theItems.iOne_Radius = self.currentValue; [self.currentValue setString:@""]; } else if([elementName isEqualToString:ktwo_x]) { theItems.iTwo_X = self.currentValue; [self.currentValue setString:@""]; } else if([elementName isEqualToString:ktwo_y]) { theItems.iTwo_Y = self.currentValue; [self.currentValue setString:@""]; } else if([elementName isEqualToString:ktwo_radius]) { theItems.iTwo_Radius = self.currentValue; [self.currentValue setString:@""]; } } -(void) parserDidEndDocument:(NSXMLParser *)parser { NSLog(@"enddocument: %@", theItems.imageURL); } -(void)parser:(NSXMLParser *) parser foundCharacters:(NSString *)string { if (elementFound == YES) { if(!currentValue) { currentValue = [NSMutableString string]; } [currentValue appendString: string]; } } When I get to parserDidEndDocument. The theItems class is empty. Here is Items.h #import <Foundation/Foundation.h> @interface Items : NSObject { @private //parsed data NSString *imageURL; NSString *iOne_X; NSString *iOne_Y; NSString *iOne_Radius; NSString *iTwo_X; NSString *iTwo_Y; NSString *iTwo_Radius; } @property (nonatomic, retain) NSString *imageURL; @property (nonatomic, retain) NSString *iOne_X; @property (nonatomic, retain) NSString *iOne_Y; @property (nonatomic, retain) NSString *iOne_Radius; @property (nonatomic, retain) NSString *iTwo_X; @property (nonatomic, retain) NSString *iTwo_Y; @property (nonatomic, retain) NSString *iTwo_Radius; @end here is Items.m #import "Items.h" @implementation Items @synthesize imageURL; @synthesize iOne_X; @synthesize iOne_Y; @synthesize iOne_Radius; @synthesize iTwo_X; @synthesize iTwo_Y; @synthesize iTwo_Radius; -(void)dealloc { [imageURL release]; [iOne_X release]; [iOne_Y release]; [iOne_Radius release]; [iTwo_X release]; [iTwo_Y release]; [iTwo_Radius release]; [super dealloc]; } @end here is my RootViewController.h #import <UIKit/UIKit.h> @class Items; @interface RootViewController : UIViewController <NSXMLParserDelegate> { NSMutableData *downloadData; NSURLConnection *connection; BOOL elementFound; NSMutableString *currentValue; NSMutableDictionary *pictures; //---xml parsing--- NSXMLParser *xmlParser; Items *theItems; NSMutableArray *aItems; } @property (nonatomic, retain) Items *theItems; @property (nonatomic, retain) NSMutableArray *aItems; @property (nonatomic, retain) NSMutableString *currentValue; @property (nonatomic, retain) NSMutableData *downloadData; @property (nonatomic, retain) NSURLConnection *connection; @end xml file example <?xml version="1.0" encoding="utf-8"?> <data> <test> <url>url</url> <one_x>83</one_x> <one_y>187</one_y> <one_radius>80</one_radius> <two_x>183</two_x> <two_y>193</two_y> <two_radius>76</two_radius> </test> </data>

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  • A question related to initWithNibName

    - by user217572
    hi These are the steps i'm following 1on click of home button i had set 1 value 2so i'm clicking on home button 3now i again click on application 4so my applicationdidfinishlaunching method calls 5i'm getting that value 1 6now in applicationdidfinishlaunching method i check wether the value is 1 or not 7now as per discussion value is 1 8in that condition i load the 1 view which is the view of rootviewcontroller 9but after complete execution of this viewdidload method it executes the initwithnibname of some another view my questuon is all about why 9 number executes if it executes how to debug it?

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  • How do I get the users location latitude and longitude?

    - by kevin Mendoza
    I need to access the users location in this method contained in the mainViewController -(void)loadAnnotations{ [mapView removeAnnotations:mapView.annotations]; CLLocationCoordinate2D workingCoordinate; workingCoordinate.latitude= //here i need the users latitude workingCoordinate.longitude= //here i need the users longitude NSLog(@" this is %@", workingCoordinate.latitude); iProspectLiteAnnotation *tempMine = [[iProspectLiteAnnotation alloc] initWithCoordinate:workingCoordinate]; [tempMine setTitle:@"Present Location"]; [tempMine setAnnotationType:iProspectLiteAnnotationTypeUser]; [mapView addAnnotation:tempMine]; } however the mainViewController is already set to <fipsideViewControllerDelegate> What should I add to the header file and the implementation file to poll the location Manager for the users current latitude and longitude?

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  • UIWebView goBack method acts differently on different devices

    - by maxpower
    First Device: 8gb 2nd gen Version: 3.1.3 (7E18) Model: MB528LL Second Device: 32gb 3rd gen Version: 3.1.3 (7E18) Model: MC008LL When I call goBack on the 8gb device, shouldStartLoadWithRequest:navigationType: is called When I call goBack on the 32gb device, shouldStartLoadWithRequest:navigationType: is not called I am not doing any caching (not like it works anyway). To make sure it wasn't caching I removed any possible caching via the request object's cache policy and removing all cache whenever webViewDidFinishLoading is called. Same app, same url, everything is the same but the device itself. Why? FYI: shouldStartLoadWithRequest:navigationType: is called on the simulator when goBack is called

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  • Autorelease vs. Release

    - by Sheehan Alam
    Given the two scenarios, which code is best practice and why? Autorelease loginButton = [[[UIBarButtonItem alloc] initWithTitle:@"Login" style:UIBarButtonItemStylePlain target:self action:@selector(loginButtonClicked:)] autorelease]; self.navigationItem.rightBarButtonItem = loginButton; or Release loginButton = [[UIBarButtonItem alloc] initWithTitle:@"Login" style:UIBarButtonItemStylePlain target:self action:@selector(loginButtonClicked:)]; self.navigationItem.rightBarButtonItem = loginButton; [loginButton release];

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  • Xcode Unit Testing - Accessing Resources from the application's bundle?

    - by Ben Scheirman
    I'm running into an issue and I wanted to confirm that I'm doing things the correct way. I can test simple things with my SenTestingKit tests, and that works okay. I've set up a Unit Test Bundle and set it as a dependency on the main application target. It successfully runs all tests whenever I press cmd+B. Here's where I'm running into issues. I have some XML files that I need to load from the resources folder as part of the application. Being a good unit tester, I want to write unit tests around this to make sure that they are loading properly. So I have some code that looks like this: NSString *filePath = [[NSBundle mainBundle] pathForResource:@"foo" ofType:@"xml"]; This works when the application runs, but during a unit test, mainBundle points to the wrong bundle, so this line of code returns nil. So I changed it up to utilize a known class like this: NSString *filePath = [[NSBundle bundleForClass:[Config class]] pathForResource:@"foo" ofType:@"xml"]; This doesn't work either, because in order for the test to even compile code like this, it Config needs to be part of the Unit Test Target. If I add that, then the bundle for that class becomes the Unit Test bundle. (Ugh!) Am I approaching this the wrong way?

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  • Fail to save a managed object to core-data after its properties were updated.

    - by Tzur Gazit
    I have to trouble to create the object, but updating it fails. Here is the creation code: // Save data from pList to core data fro the first time - (void) saveToCoreData:(NSDictionary *)plistDictionary { // Create system parameter entity SystemParameters *systemParametersEntity = (SystemParameters *)[NSEntityDescription insertNewObjectForEntityForName:@"SystemParameters" inManagedObjectContext:mManagedObjectContext]; //// // GPS SIMULATOR //// NSDictionary *GpsSimulator = [plistDictionary valueForKey:@"GpsSimulator"]; [systemParametersEntity setMGpsSimulatorEnabled:[[GpsSimulator objectForKey:@"Enabled"] boolValue]]; [systemParametersEntity setMGpsSimulatorFileName:[GpsSimulator valueForKey:@"FileName"]]; [systemParametersEntity setMGpsSimulatorPlaybackSpeed:[[GpsSimulator objectForKey:@"PlaybackSpeed"] intValue]]; [self saveAction]; } During execution the cached copy is changed and then it is saved (or trying) to the database. Here is the code to save the changed copy: // Save data from pList to core data fro the first time - (void) saveSystemParametersToCoreData:(SystemParameters *)theSystemParameters { // Step 1: Select Data NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"SystemParameters" inManagedObjectContext:mManagedObjectContext]; [fetchRequest setEntity:entity]; NSError *error = nil; NSArray *items = [self.managedObjectContext executeFetchRequest:fetchRequest error:&error]; [fetchRequest release]; if (error) { NSLog(@"CoreData: saveSystemParametersToCoreData: Unresolved error %@, %@", error, [error userInfo]); abort(); } // Step 2: Update Object SystemParameters *systemParameters = [items objectAtIndex:0]; //// // GPS SIMULATOR //// [systemParameters setMGpsSimulatorEnabled:[theSystemParameters mGpsSimulatorEnabled]]; [systemParameters setMGpsSimulatorFileName:[theSystemParameters mGpsSimulatorFileName]]; [systemParameters setMGpsSimulatorPlaybackSpeed:[theSystemParameters mGpsSimulatorPlaybackSpeed]]; // Step 3: Save Updates [self saveAction]; } As to can see, I fetch the object that I want to update, change its values and save. Here is the saving code: - (void)saveAction { NSError *error; if (![[self mManagedObjectContext] save:&error]) { NSLog(@"ERROR:saveAction. Unresolved Core Data Save error %@, %@", error, [error userInfo]); exit(-1); } } The Persistent store method: - (NSPersistentStoreCoordinator *)persistentStoreCoordinator { if (mPersistentStoreCoordinator != nil) { return mPersistentStoreCoordinator; } NSString *path = [self databasePath]; NSURL *storeUrl = [NSURL fileURLWithPath:path]; NSError *error = nil; mPersistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]]; if (![mPersistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl options:nil error:&error]) { NSLog(@"Unresolved error %@, %@", error, [error userInfo]); abort(); } return mPersistentStoreCoordinator; } There is no error but the sqLite file is not updated, hence the data is not persistent. Thanks in advance.

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  • UIWebView autosize issue only on iOS 4.3

    - by troop231
    I am trying to figure out how to fix this bug that only occurs on iOS 4.3. When the application launches, it displays a PDF that is scaled to fit in the UIWebView. It behaves perfectly until you pinch to zoom on the document, and then rotate it, leaving behind a black area. If you don't pinch to zoom, it doesn't leave the black area. I don't understand why this is a iOS 4.3 only issue. Screenshot of the issue: I've been trying to solve this problem awhile now, and would greatly appreciate your help. Thank you. Screenshots of the .xib settings: The code I'm using is: .h: #import <UIKit/UIKit.h> @interface ViewController : UIViewController { UIWebView *webView; } @property (nonatomic) IBOutlet UIWebView *webView; @end .m: #import "ViewController.h" @interface ViewController () @end @implementation ViewController @synthesize webView; - (BOOL)shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation)interfaceOrientation { if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) { return YES; } else { return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); } } - (void)viewDidLoad { [super viewDidLoad]; NSString *urlAddress = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"pdf"]; NSURL *url = [NSURL fileURLWithPath:urlAddress]; NSURLRequest *requestObj = [NSURLRequest requestWithURL:url]; [webView loadRequest:requestObj]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } @end

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  • How to track dealloc of an abstract object class (NSMutable...)

    - by Thomas Tempelmann
    I have a bug in my code caused by a premature freeing of a ObjC object. I seem not to be able to find it by just looking at my code. There's usually a simple trick to track the dealloc to any class: Implement dealloc, and set a breakpoint. This even usually works with standard objects, by subclassing them and making sure I instantiate the subclass instead of the standard class. However, this does not seem to work with NSMutableArray, and probably neither with similar NSMutable... classes. Some explanations for this can be found here: link text Any other ideas how to track the dealloc invocation of a particular class or object so that I can see the call stack? It's probably possible with DTrace. Any pointers without having to read the entire dtrace docs first?

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  • TabBars and iOS 7

    - by MichaelScaria
    I have a UITabbarController that I'm pushing another controller on top of using a UINavigationController. On iOS 6 and below, the tabBar of the parent controller slides away and the toolbar of the new view controller is presented. But on iOS 7 the tabBar doesn't animate away even if I run the code [self.navigationController setToolbarHidden:YES animated:NO]; EDIT - Okay I narrowed my problem to iOS 7 not respecting the hidesBottomBarWhenPushed property, I followed the answers in hidesBottomBarWhenPushed ignored in iOS 7 but it didn't work. The view that is pushed has a toolbar with buttons and the buttons are responding to touches, it's just that the tabBar is on top of the toolbar.

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  • A question related to back button

    - by user217572
    I'm doing code for state maintainance So what happens that ,my currnet view will be appear after pressing homme now in this view i want to add backbutton in normal condition i'm adding button like this, [self navigationItem].title = NSLocalizedString(@"login_title",@""); UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"back_button",@" ") style:UIBarButtonItemStylePlain target:self action:@selector(done)]; [self.navigationItem setHidesBackButton:YES animated:YES]; self.navigationItem.leftBarButtonItem = backItem; [backItem release];

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  • ViewController doesn't get released

    - by ObjectiveFlash
    Every time I turn the page in my app, I am removing and releasing the previous viewController - but for some reason it is still in memory. I know this, because after using the app for a while, I get 47 memory warnings - one from each view controller - if I had opened 47 pages before the memory warning occurred. I get 60 memory warnings if I had opened 60 pages before the memory warning occurred. And so on... This is the code that runs from page to page: UIViewController *nextController; Class nextClass = [pageClasses objectAtIndex:(currentPageIndex - 1)]; nextController = [[nextClass alloc] initWithNibName:[pageNibs objectAtIndex:(currentPageIndex - 1)] bundle:nil]; [nextController performSelector:@selector(setDelegate:) withObject:self]; [currentPageController.view removeFromSuperview]; [self.view addSubview:nextController.view]; [currentPageController release]; currentPageController = nextController; [currentPageController retain]; [nextController release]; Can anybody point to any issues they see? Thanks so much!

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  • how to rotate to current of Orientation?

    - by RAGOpoR
    according to my code when my device are use in Landscape when i pushViewController it will automatic show in UIDeviceOrientationPortrait. i need to rotate my device to Portrait and then rotate to Landscape, then it will present in Landscape mode. how can i rotate to current of Orientation with out use of private API(setOrientation)? - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return ((interfaceOrientation == UIInterfaceOrientationLandscapeLeft) || (interfaceOrientation == UIDeviceOrientationPortrait) || (interfaceOrientation == UIInterfaceOrientationLandscapeRight)); }

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  • Navigationcontroller, why isnt this working?

    - by f0rz
    Hi ! Why wont this work? View1 loads View2. In view2: - (void) goToView { View3 *plainText = [[Tabview_testViewController alloc] initWithNibName:@"View3" bundle:nil]; [self.navigationController pushViewController:plainText animated: NO]; [plainText release]; } - (void)viewDidLoad { [self goToView]; [super viewDidLoad]; } This will not trigger navigationController to pushView, but if I add a button and setAction (goToView) it works perfectly. What kind of problem do I missing here? Regards

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  • tracking the position of dragview

    - by user262325
    Hello everyone I put a dragview on an UIView, I hope when I drag the dragview, its superview (UIView) tracks the position of the dragview and moves itself to the position where to keep dragview at the original position on the UIView. The codes show below: #import <UIKit/UIKit.h> @interface DragView : UIImageView { CGPoint startLocation; } @end #import "DragView.h" @implementation DragView - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { // Initialization code } return self; } - (void)drawRect:(CGRect)rect { // Drawing code } -(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent*)event { CGPoint pt=[[touches anyObject] locationInView:self]; startLocation=pt; [[self superview] bringSubviewToFront:self]; } -(void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { CGPoint pt=[[touches anyObject] locationInView:self]; CGRect frame=[self frame]; frame.origin.x+=pt.x-startLocation.x; frame.origin.y+=pt.y-startLocation.y; CGRect frame1=[[self superview] frame];//superview of the dragview frame1.origin.x+=frame.origin.x; //tracks the postion of dragview frame1.origin.y+=frame.origin.y; [[self superview] setFrame: frame1 ]; //move to new position [self setFrame:frame]; } my problem is that the UIView moved but lagged to the movement of the drageview(RED BLOCK). Welcome any comment Thanks interdev

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