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  • How do those bitmasks actually work?

    - by mystify
    For example, this method from NSCalendar takes a bitmask: - (NSDate *)dateByAddingComponents:(NSDateComponents *)comps toDate:(NSDate *)date options:(NSUInteger)opts So options can be like: NSUInteger options = kCFCalendarUnitYear; or like: NSUInteger options = kCFCalendarUnitYear | kCFCalendarUnitMonth | kCFCalendarUnitDay; What I don't get is, how is this actually done? I mean: How can they pull out those values which are merged into options? If I wanted to program something like this, that can take a bitmask, how would that look?

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  • Avaudioplayer problem regarding songs

    - by Arun Sharma
    I am using avaudioplayer for playing mp3 songs. The problem is in being able to catch the instance of the player to control it i.e. Stop it, Play it etc. The code by default creates multiple instances of the same player and overlaps the songs. I am being unable to reference the player specifically. Do you have an idea as to how we can do so? Thanks Arun Sharma

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  • UITextView inside UIScrollView is not First Responder

    - by Sheehan Alam
    I have a UITextView on a View that becomes the first responder. When I embed the UITextView inside of a UIScrollView in Interface Builder the UITextView is no longer the first responder. I am not sure what has changed? - (void)viewDidLoad { [super viewDidLoad]; [scrollView setContentSize:CGSizeMake(540,620)]; composeTextView.delegate = self; [composeTextView becomeFirstResponder]; }

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  • UITableView titleForHeaderInSection prints headers to console twice then crashes

    - by joec
    In the method below titleForHeaderInSection, for some reason the NSLog prints out the headers twice and then the app crashes in objc_msgSend. I can't understand why this would cause the app to crash? It would seem from research that crashes in objc_msgSend are caused by sending messages to already freed objects, but is that the case here? My sectionNames array is populated in viewDidLoad. - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { NSString *title = nil; title=[sectionNames objectAtIndex:section]; NSLog(title); return title; } Thanks

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  • How to hide tabbar for some pages and make it visible again?

    - by priya
    I've got an application that uses a Tab Bar Controller along with a Navigation Controller.But for some pages I want to hide both bars(Tab & navigation) after that those will be visible again...I am able to hide navigation bar & also done with making. it appear after some pages. I am able to hide tab bar with - (BOOL)hidesBottomBarWhenPushed{ return TRUE; } But problem is how do I make it Visible again after some pages?

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  • Outputing struct to NSLog for debugging?

    - by fuzzygoat
    I am just curious, is there a way to print via NSLog the contents of a struct? id <MKAnnotation> mp = [annotationView annotation]; MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance([mp coordinate], 350, 350); I am trying to output whats in [mp coordinate] for debugging. . EDIT_001: I cracked it, well unless there is another way. id <MKAnnotation> mp = [annotationView annotation]; CLLocationCoordinate2D location = [mp coordinate]; NSLog(@"LAT: %f LON: %f", location.latitude, location.longitude); many thanks gary

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  • NSButton argument binding doesn't pass argument?

    - by Jeff
    I have a NSCollectionView with a NSButton in the collection view item. The xib's owner is set to my BatchListViewController and the controller has the method @interface BatchListViewController : NSViewController -(IBAction)another_click; @end I set the binding for target to be: This works fine but I also want to send the underlying model to the another_click method. According to the Apple docs, The objects specified in the argument bindings are passed as parameters to the selector specified in the target binding when the NSButton is clicked. So I set the binding for argument to be: This runs fine if I keep the selector method's signature the same another_click: but if I change it to -(IBAction)another_click:(id)arg; I get the dreaded error: BatchListViewController another_click]: unrecognized selector sent to instance What am I doing wrong? Apple's docs say this is possible but I haven't been able to find an example of this working. Even other SO threads are saying this isn't possible but that can't be right.

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  • iphone OCMockObject and unit-testing a class that inherits from NSURLConnection

    - by Justin Galzic
    I want to unit test the custom init method of a class that inherits from NSURLConnection -- how would I do this if the init of my testable class invokes NSURLConnection's initWithRequest? I'm using OCMock and normally, I can mock objects that are contained within my test class. For this inheritance scenario, what's the best approach to do this? - (void)testInit { id urlRequest = [OCMockObject mockForClass:[NSURLRequest class]]; MyURLConnectionWrapper *conn = [[MyURLConnectionWrapper alloc] initWithRequest:urlRequest delegate:self someData:extraneousData]; } My class is implemented like this: @interface MyURLConnectionWrapper : NSURLConnection { } - (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate someData:(NSString *)fooData @end @implementation MyURLConnectionWrapper - (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate someData:(NSString *)fooData { if (self = [super initWithRequest:request delegate:delegate]) { // do some additional work here } return self; } Here's the error I get: OCMockObject[NSURLRequest]: unexpected method invoked: _CFURLRequest

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  • Implementing Static Libraries In iPhone

    - by socialCircus
    Hi All, I have created a static library following this link. But I am facing Problems in using the library. For reference on how to use static libraries in an iPhone project I followed this link . But I am stil struggling with the "How to implement static libraries in any other iPhone project?" question. Thank you all.

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  • iPhone: Prevent View from Rotation

    - by Matthias
    Hi, I use a UITabBarController with 4 views. The first of those 4 views should be able to rotate, the other three not. And now the problem is, when having a tab bar controller you have to set all used views to rotatable (i.e. returning TRUE in shouldAutorotateToInterfaceOrientation). So, my question is now, can I prevent the three views from rotation even though the shouldAutorotateToInterfaceOrientation method returns TRUE? Thanks for your help. Regards Matthias

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  • Asynchronous NSURLConnection Throws EXC_BAD_ACCESS

    - by Sheehan Alam
    I'm not really sure why my code is throwing a EXC_BAD_ACCESS, I have followed the guidelines in Apple's documentation: -(void)getMessages:(NSString*)stream{ NSString* myURL = [NSString stringWithFormat:@"http://www.someurl.com"]; NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:myURL]]; NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; if (theConnection) { receivedData = [[NSMutableData data] retain]; } else { NSLog(@"Connection Failed!"); } } And my delegate methods #pragma mark NSURLConnection Delegate Methods - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { // This method is called when the server has determined that it // has enough information to create the NSURLResponse. // It can be called multiple times, for example in the case of a // redirect, so each time we reset the data. // receivedData is an instance variable declared elsewhere. [receivedData setLength:0]; } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { // Append the new data to receivedData. // receivedData is an instance variable declared elsewhere. [receivedData appendData:data]; } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { // release the connection, and the data object [connection release]; // receivedData is declared as a method instance elsewhere [receivedData release]; // inform the user NSLog(@"Connection failed! Error - %@ %@", [error localizedDescription], [[error userInfo] objectForKey:NSErrorFailingURLStringKey]); } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { // do something with the data // receivedData is declared as a method instance elsewhere NSLog(@"Succeeded! Received %d bytes of data",[receivedData length]); // release the connection, and the data object [connection release]; [receivedData release]; } I get an EXC_BAD_ACCESS on didReceiveData. Even if that method simply contains an NSLog, I get the error. Note: receivedData is an NSMutableData* in my header file

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  • Mystery Key Value Coding Key

    - by Stephen Furlani
    Hello, I'm attempting to load data from an undocumented API (OsiriX). Getting the NSManagedObject like this: NSManagedObject *itemStudy = [[BrowserController databaseOutline] itemAtRow: [[BrowserController databaseOutline] selectedRow]]; works just fine. But getting the NSManagedObject like this: seriesArray = [_context executeFetchRequest:request error:&error]; NSManagedObject *itemSeries = [seriesArray objectAtIndex:0]; Generates an error when I call [itemSeries valueForKey:@"type"] 2010-05-27 11:04:48.178 rcOsirix[27712:7b03] Exception: [<NSManagedObject 0xd30fd0> valueForUndefinedKey:]: the entity Series is not key value coding-compliant for the key "type". This confuses me thoroughly. If I print the KVC values for itemSeries I get this list: 2010-05-27 11:04:48.167 rcOsirix[27712:7b03] KVC comment 2010-05-27 11:04:48.168 rcOsirix[27712:7b03] KVC date 2010-05-27 11:04:48.168 rcOsirix[27712:7b03] KVC dateAdded 2010-05-27 11:04:48.169 rcOsirix[27712:7b03] KVC dateOpened 2010-05-27 11:04:48.169 rcOsirix[27712:7b03] KVC displayStyle 2010-05-27 11:04:48.170 rcOsirix[27712:7b03] KVC id 2010-05-27 11:04:48.170 rcOsirix[27712:7b03] KVC modality 2010-05-27 11:04:48.170 rcOsirix[27712:7b03] KVC name 2010-05-27 11:04:48.171 rcOsirix[27712:7b03] KVC numberOfImages 2010-05-27 11:04:48.171 rcOsirix[27712:7b03] KVC numberOfKeyImages 2010-05-27 11:04:48.171 rcOsirix[27712:7b03] KVC rotationAngle 2010-05-27 11:04:48.172 rcOsirix[27712:7b03] KVC scale 2010-05-27 11:04:48.172 rcOsirix[27712:7b03] KVC seriesDICOMUID 2010-05-27 11:04:48.173 rcOsirix[27712:7b03] KVC seriesDescription 2010-05-27 11:04:48.173 rcOsirix[27712:7b03] KVC seriesInstanceUID 2010-05-27 11:04:48.173 rcOsirix[27712:7b03] KVC seriesSOPClassUID 2010-05-27 11:04:48.174 rcOsirix[27712:7b03] KVC stateText 2010-05-27 11:04:48.174 rcOsirix[27712:7b03] KVC thumbnail 2010-05-27 11:04:48.174 rcOsirix[27712:7b03] KVC windowLevel 2010-05-27 11:04:48.175 rcOsirix[27712:7b03] KVC windowWidth 2010-05-27 11:04:48.175 rcOsirix[27712:7b03] KVC xFlipped 2010-05-27 11:04:48.176 rcOsirix[27712:7b03] KVC xOffset 2010-05-27 11:04:48.176 rcOsirix[27712:7b03] KVC yFlipped 2010-05-27 11:04:48.176 rcOsirix[27712:7b03] KVC yOffset 2010-05-27 11:04:48.177 rcOsirix[27712:7b03] KVC mountedVolume 2010-05-27 11:04:48.177 rcOsirix[27712:7b03] KVC study 2010-05-27 11:04:48.178 rcOsirix[27712:7b03] KVC images The KVC for itemStudy is this: 2010-05-27 10:46:40.336 OsiriX[27266:a0f] KVC accessionNumber 2010-05-27 10:46:40.336 OsiriX[27266:a0f] KVC comment 2010-05-27 10:46:40.336 OsiriX[27266:a0f] KVC date 2010-05-27 10:46:40.336 OsiriX[27266:a0f] KVC dateAdded 2010-05-27 10:46:40.336 OsiriX[27266:a0f] KVC dateOfBirth 2010-05-27 10:46:40.336 OsiriX[27266:a0f] KVC dateOpened 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC dictateURL 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC expanded 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC hasDICOM 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC id 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC institutionName 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC lockedStudy 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC modality 2010-05-27 10:46:40.338 OsiriX[27266:a0f] KVC name 2010-05-27 10:46:40.338 OsiriX[27266:a0f] KVC numberOfImages 2010-05-27 10:46:40.338 OsiriX[27266:a0f] KVC patientID 2010-05-27 10:46:40.338 OsiriX[27266:a0f] KVC patientSex 2010-05-27 10:46:40.338 OsiriX[27266:a0f] KVC patientUID 2010-05-27 10:46:40.338 OsiriX[27266:a0f] KVC performingPhysician 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC referringPhysician 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC reportURL 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC stateText 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC studyInstanceUID 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC studyName 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC windowsState 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC albums 2010-05-27 10:46:40.340 OsiriX[27266:a0f] KVC series If I use code: NSDictionary *props = [[item entity] propertiesByName]; for (NSString *s in [props allKeys]) { NSLog(@"KVC %@", s); } Yet itemStudy throws no error if I call [itemStudy valueForKey:@"type"] when it should because there's no KVC for @"type"!!! Granted, the objects are different but neither of them contain the key @"type" and they both should throw errors, yet the Osirix code Tests for both conditions: if ([[item valueForKey:@"type"] isEqualToString:@"Series"]) { ... } if ([[item valueForKey:@"type"] isEqualToString:@"Study"]) { ... } And throws no errors. Yet when I load an NSManagedObject of the same exact model and entity @"Series" it throws the 'no key value' when passed into the conditions above. Am I missing something? Both the superentity and subentities of itemSeries and itemStudy are nil so they don't inherit from something that has KVC @"type". I'm totally at a loss as to explain what is going on. --- EDIT --- I know no one can explain what is going on... but maybe where to start looking? How would itemStudy have the extra KVC @"type" that doesn't show up in it's property list? Thank you for your assistance, -Stephen

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  • Serious Application Error

    - by Garry
    I have a TableView controller class that uses a fetched results controller to display a list of 'patient' entities taken from a Core Data model. The sections of this table are taken from a patient attribute called 'location'. Here is the sort descriptor for the fetch request: NSSortDescriptor *locationDescriptor = [[NSSortDescriptor alloc] initWithKey:@"location" ascending:YES]; NSSortDescriptor *lastNameDescriptor = [[NSSortDescriptor alloc] initWithKey:@"lastName" ascending:YES]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:locationDescriptor, lastNameDescriptor, nil]; Here is the initialisation code for the FRC: NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:@"location" cacheName:@"List"]; When I want to add a new 'patient' entity - I click an add button which then pushes an 'add new patient' view controller to the navigation stack. The first patient I add works fine. If I add a second patient - the app will sometimes crash with the following error: 2010-03-22 14:42:05.270 Patients[1126:207] Serious application error. Exception was caught during Core Data change processing: * -[NSCFArray insertObject:atIndex:]: index (1) beyond bounds (1) with userInfo (null) 2010-03-22 14:42:05.272 Patients[1126:207] Terminating app due to uncaught exception 'NSRangeException', reason: '** -[NSCFArray insertObject:atIndex:]: index (1) beyond bounds (1)' This only seems to happen if the patient's have a location added (if none is added then the location defaults to 'unknown'). It seems to have something to do with the sorting of the location too. For instance, if the first patient location = ward 14 and the second = ward 9 then it crashes without fail. I'm wondering if this is something to do with how I am asking the fetched results controller to sort the section names?? This bug is driving me nuts and I just can't figure it out. Any help would be greatly appreciated!

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  • nsstring - out of scope

    - by alexeyndru
    -(void)loadWebAdress:(NSString*)textAdress { [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; adressurl=[NSString stringWithFormat:@"http://%@", textAdress]; NSURL *url=[NSURL URLWithString:adressurl]; NSURLRequest *requestObj=[NSURLRequest requestWithURL:url]; [webview loadRequest:requestObj]; } although url takes it's value from adressurl, adressurl is all the time out of scope when checked in debugger. what is going on? i would like to use it in some other places too. not only in this method. because is out of scope, the app crashes. But, I repeat, it is the one who gives its value to url.

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  • Warning: control reaches end of non-void function - iPhone

    - by Dave
    I keep getting 'warning: control reaches end of non-void function' with this code: - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { if (section ==0) { return [comparativeList count]; } if (section==1) { return [generalList count]; } if (section==2) { return [contactList count]; How can I get rid of this warning? Thanks.

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  • NSCollectionView draws nothing

    - by PCWiz
    I'm trying to set up an NSCollectionView (I have done this successfully in the past, but for some reason it fails this time). I have a model class called "TestModel", and it has an NSString property that just returns a string (just for testing purposes right now). I then have an NSMutableArray property declaration in my main app delegate class, and to this array I add instances of the TestModel object. I then have an Array Controller that has its Content Array bound the app delegate's NSMutableArray. I can confirm that everything up to here is working fine; NSLogging: [[[arrayController arrangedObjects] objectAtIndex:0] teststring] worked fine. I then have all the appropriate bindings for the collection view set up, (itemPrototype and content), and for the Collection View Item (view). I then have a text field in the collection item view that is bound to Collection View Item.representedObject.teststring. However NOTHING displays in the collection view when I start the app, just a blank white screen. What am I missing? UPDATE: Here is the code I use (requested by wil shipley): // App delegate class @interface AppController : NSObject { NSMutableArray *objectArray; } @property (readwrite, retain) NSMutableArray *objectArray; @end @implementation AppController @synthesize objectArray; - (id)init { if (self = [super init]) { objectArray = [[NSMutableArray alloc] init]; } return self; } - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { TestModel *test = [[[TestModel alloc] initWithString:@"somerandomstring"] autorelease]; if (test) [objectArray addObject:test]; } @end // The model class (TestModel) @interface TestModel : NSObject { NSString *teststring; } @property (readwrite, retain) NSString *teststring; - (id)initWithString:(NSString*)customString; @end @implementation TestModel @synthesize teststring; - (id)initWithString:(NSString*)customString { [self setTeststring:customString]; } - (void)dealloc { [teststring release]; } @end And then like I said the content array of the Array Controller is bound to this "objectArray", and the Content of the NSCollectionView is bound to Array Controller.arrangedObjects. I can verify that the Array Controller has the objects in it by NSLogging [arrayController arrangedObjects], and it returns the correct object. Its just that nothing displays in the NSCollectionView. UPDATE 2: If I log [collectionView content] I get nothing: 2009-10-21 08:02:42.385 CollViewTest[743:a0f] ( ) The problem is probably there. UPDATE 3: As requested here is the Xcode project: http://www.mediafire.com/?mjgdzgjjfzw Its a menubar app, so it has no window. When you build and run the app you'll see a menubar item that says "test", this opens the view that contains the NSCollectionView. Thanks

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  • iPhone Twitter Get UserId

    - by Mick Walker
    Hi, I am looking for a way to get a twitter users userid via their username. For example take http://twitter.com/AlySSa_miLAno (yes I know her twitter page off by heart lol) on the right hand side of the page is a link to her RSS feed: feed://twitter.com/statuses/user_timeline/26642006.rss In this context Alyssa's userid would be 26642006. Ideally I would like to avoid reading the full content of the page, as this could be quite expensive on a mobile device, so if anyone knows how to accomplish this using any Twitter/3rd party webservices that would be great.

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  • Help with iphone button pressed

    - by StealthRT
    I am trying to see which button was clicked on so I can preform the correct logic. This is the code for the buttons: UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(270, 423, 60, 60)]; [button addTarget:self action:@selector(buttonPressedAction:) forControlEvents:UIControlEventTouchUpInside]; [button setBackgroundImage:[[UIImage imageNamed:@"refreshicon.png"] stretchableImageWithLeftCapWidth:10.0 topCapHeight:0.0] forState:UIControlStateNormal]; UIButton *button2 = [[UIButton alloc] initWithFrame:CGRectMake(0, 423, 60, 60)]; [button2 addTarget:self action:@selector(buttonPressedAction:) forControlEvents:UIControlEventTouchUpInside]; [button2 setBackgroundImage:[[UIImage imageNamed:@"login.png"] stretchableImageWithLeftCapWidth:10.0 topCapHeight:0.0] forState:UIControlStateNormal]; [self.navigationController.view addSubview:button]; [self.navigationController.view addSubview:button2]; And this is how I call the buttonPressedAction: - (void)buttonPressedAction:(id)sender { NSLog(@"%@", [sender value]); isRefreshing = TRUE; [self loadTheXML]; [self.tableView reloadData]; } But when I use NSLog to see what the sender value is, it crashes. Any advice for what's happening and how to correct it?

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