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  • Random number generation

    - by Chandan Shetty SP
    I am using below code to generate random numbers in range... int randomNumberWithinRange(int min,int max) { int snowSize = 0; do { snowSize = rand()%max; } while( snowSize < min || snowSize > max ); return snowSize; } for(int i = 0; i < 10 ; i++) NSlog("@"%d",\t", randomNumberWithinRange(1,100)); If I quit my application and restart, same set of numbers are generated. How to generate different set of random numbers for every launching.

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  • is this uibutton autoreleased ?

    - by dubbeat
    HI This is just a question to check my sanity really. I'm hunting memory leaks that show up in instruments but not the static analyzer. In one spot the analyzer is pointing to this block of code UIButton *randomButton = [UIButton buttonWithType:UIButtonTypeRoundedRect ]; randomButton.frame = CGRectMake(205, 145, 90, 22); // size and position of button [randomButton setTitle:@"Random" forState:UIControlStateNormal]; randomButton.backgroundColor = [UIColor clearColor]; randomButton.adjustsImageWhenHighlighted = YES; [randomButton addTarget:self action:@selector(getrandom:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:randomButton]; For some reason I thought the above code would auto release the button because I'm not calling init or alloc? If I add [randombutton release] at the bottom of the code my button fails to show. Could somebody describe to me the correct way to release a button from memory that is created in the above way? Or would I be better off making the button a class variable and sticking the release in the dealloc method?

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  • productsRequest response method is not calling

    - by jeeva
    Hi i am implementing in app purchase i am sending request to apple store through - (void) requestProductData { SKProductsRequest *request= [[SKProductsRequest alloc] initWithProductIdentifiers: [NSSet setWithObjects: featureAId,featureBId,nil]]; // add any other product here request.delegate = self; [request start]; } the response method - (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response { [purchasableObjects addObjectsFromArray:response.products]; } is not getting call at all. only once it called out of ten attempts i tried. any idea regarding this..? thanks in advance

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  • How to load different XIBs for different device orientations for same viewcontroller?

    - by Jaanus
    The documentation says that if I want to support both portrait and landscape, I basically have two ways of doing that: Set up the viewcontroller's view so that the subviews autoresize correctly and make smaller changes programmatically at runtime If the changes are more substantial, create an alternative landscape interface and push/pop the alternative modal viewcontroller at runtime I would like to present the info where the layout is substantially different, but logic is the same. Ideally, I would load another XIB for the same viewcontroller, but it does not seem to be an option. Sounds like #2 is what I need to do, but my problem with that is that it sounds like it would use the standard modalviewcontroller animations that are nothing like the device rotation animation. (Of course, being the lazywebber that I am, I did not test this hypothesis.) So, how do I load an alternative layout for landscape with the same viewcontroller but different XIB? Should I use the method #2 above and is the rotation animation natural? Or is there some other way?

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  • How do I start up an NSRunLoop, and ensure that it has an NSAutoreleasePool that gets emptied?

    - by Nick Forge
    I have a "sync" task that relies on several "sub-tasks", which include asynchronous network operations, but which all require access to a single NSManagedObjectContext. Due to the threading requirements of NSManagedObjectContexts, I need every one of these sub-tasks to execute on the same thread. Due to the amount of processing being done in some of these tasks, I need them to be on a background thread. At the moment, I'm launching a new thread by doing this in my singleton SyncEngine object's -init method: [self performSelectorInBackground:@selector(initializeSyncThread) withObject:nil]; The -initializeSyncThread method looks like this: - (void)initializeSyncThread { self.syncThread = [NSThread currentThread]; self.managedObjectContext = [(MyAppDelegate *)[UIApplication sharedApplication].delegate createManagedObjectContext]; NSRunLoop *runLoop = [NSRunLoop currentRunLoop]; [runLoop run]; } Is this the correct way to start up the NSRunLoop for this thread? Is there a better way to do it? The run loop only needs to handle 'performSelector' sources, and it (and its thread) should be around for the lifetime of the process. When it comes to setting up an NSAutoreleasePool, should I do this by using Run Loop Observers to create the autorelease pool and drain it after every run-through?

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  • UIPageControl design challenge

    - by Sheehan Alam
    My app has a UITabBarController that loads many different UINavigationControllers. I want a UIPageControl to switch between the different UINavigationControllers. Do I place the UIPageControl in my UINavigationController or in my appDelegate? Suggestions and best practices are welcome.

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  • Anything wrong with this code?

    - by ct2k7
    I am using this to determine which view to go to next, from the result as input from UITableView. The following code isn't working, but I think it should be! Do you see anything wrong with it? NSString *option = [menuArray objectAtIndex:indexPath.row]; if (option == @"New Transaction"){ NTItems *nTItemsController = [[NTItems alloc] initWithNibName:@"NTItems" bundle:nil]; // Pass the selected object to the new view controller. [self.navigationController pushViewController:nTItemsController animated:YES]; [NTItems release];} else if (option == @"Previous Transactions"){} else if (option == @"Reprint a reciept"){} else if (option == @"Settings"){} else if (option == @"Logout"){ LoginViewController *nTItemsController = [[LoginViewController alloc] initWithNibName:@"LoginViewController" bundle:nil]; // Pass the selected object to the new view controller. [self.navigationController pushViewController:nTItemsController animated:YES]; [LoginViewController release]; }

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  • Set the title of a UIButton with a single method invocation?

    - by Greg Maletic
    I'd like to set the title of a UIButton via code. I find myself having to call -[UIButton setTitle:forState:] for UIControlStateNormal, UIControlStateHighlighted, UIControlStateDisabled, UIControlStateSelected. And that doesn't even take into account all of the combinations of these states together. Needless to say, this is tiresome. Is there a single call I can make that will set one string as the title for all of the states? (Since, I assume that in 95% of the cases, that's the desired behavior?)

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  • Adding objects to an NSMutableArray, order seems odd when parsing from an XML file

    - by diatrevolo
    Hello: I am parsing an XML file for two elements: "title" and "noType". Once these are parsed, I am adding them to an object called aMaster, an instance of my own Master class that contains NSString variables. I am then adding these instances to an NSMutableArray on a singleton, in order to call them elsewhere in the program. The problem is that when I call them, they don't seem to be on the same NSMutableArray index... each index contains either the title OR the noType element, when it should be both... can anyone see what I may be doing wrong? Below is the code for the parser. Thanks so much!! #import "XMLParser.h" #import "Values.h" #import "Listing.h" #import "Master.h" @implementation XMLParser @synthesize sharedSingleton, aMaster; - (XMLParser *) initXMLParser { [super init]; sharedSingleton = [Values sharedValues]; aMaster = [[Master init] alloc]; return self; } - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict { aMaster = [[Master alloc] init]; //Extract the attribute here. if ([elementName isEqualToString:@"intro"]) { aMaster.intro = [attributeDict objectForKey:@"enabled"]; } else if ([elementName isEqualToString:@"item"]) { aMaster.item_type = [attributeDict objectForKey:@"type"]; //NSLog(@"Did find item with type %@", [attributeDict objectForKey:@"type"]); //NSLog(@"Reading id value :%@", aMaster.item_type); } else { //NSLog(@"No known elements"); } //NSLog(@"Processing Element: %@", elementName); //HERE } - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { if(!currentElementValue) currentElementValue = [[NSMutableString alloc] initWithString:string]; else { [currentElementValue appendString:string];//[tempString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]]; CFStringTrimWhitespace((CFMutableStringRef)currentElementValue); } } - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { if ([elementName isEqualToString:@"item"]) { [sharedSingleton.master addObject:aMaster]; NSLog(@"Added %@ and %@ to the shared singleton", aMaster.title, aMaster.noType); //Only having one at a time added... don't know why [aMaster release]; aMaster = nil; } else if ([elementName isEqualToString:@"title"]) { [aMaster setValue:currentElementValue forKey:@"title"]; } else if ([elementName isEqualToString:@"noType"]) { [aMaster setValue:currentElementValue forKey:@"noType"]; //NSLog(@"%@ should load into the singleton", aMaster.noType); } NSLog(@"delimiter"); NSLog(@"%@ should load into the singleton", aMaster.title); NSLog(@"%@ should load into the singleton", aMaster.noType); [currentElementValue release]; currentElementValue = nil; } - (void) dealloc { [aMaster release]; [currentElementValue release]; [super dealloc]; } @end

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  • Invocation of ViewDidLoad after initWithNibName

    - by live2dream95
    It appears that ViewDidLoad() is sent to a ViewController only after its View is physically displayed (i.e. via NavigationController pushViewController), and not immediately after initWithNibName(). Is this a behavior I can rely on? I would like to get the chance to set the member variables of my view so that all the members are valid by the time ViewDidLoad() is invoked.

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  • XCode Developer Documentation crashes after clicking any link on the startup screen

    - by Noah Sussman
    I just installed XCode 3.2.1. When I open the Developer Documentation and click any link on the startup screen, XCode crashes. Has anyone run into this problem? Also hints as to how to debug would be excellent -- I've only been using XCode for a week. I can still get into the documentation if I open some code and then right-click a symbol and choose "Find in Documentation." But its annoying that I can't just open the docs and browse them.

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  • using performSelector

    - by zebra
    Hi all, i've my method that implement a reverseGeocoder - (void)reversing { geoCoder=[[MKReverseGeocoder alloc] initWithCoordinate:locManager.location.coordinate]; geoCoder.delegate=self; [geoCoder start]; } i recall reversing in another method with this: [self performSelector:@selector(reversing) withObject:nil afterDelay:10]; and i receive 2010-04-30 17:44:17.616 high[1167:207] Retrive City Milano 2010-04-30 17:44:17.628 high[1167:207] geocoder released 2010-04-30 17:44:18.723 high[1167:207] Error Domain=MKErrorDomain Code=4 "Operation could not be completed. (MKErrorDomain error 4.)" Program received signal: “EXC_BAD_ACCESS”. Can someone help me? :D

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  • UPDATE MKANNOTATION COORDINATES

    - by user345711
    Hi everyone, i'm having problems trying to update an annotation location with different coordinates. Is there any way I can change de location property without having to create another annotation? I've tried the code below with no luck. The annotation i'm trying to get is not updating its location. Please help! CLLocationCoordinate2D location; location.latitude = -36.560976; location.longitude = -59.455807; for (id annotation in self.mapView.annotations) { if ([annotation isKindOfClass:[MyAnnotation class]]) { [annotation setCoords:location]; //setCoords is defined in MyAnnotation class } } Thank you all!

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  • UITextView on iPad INCREDIBLY Slow

    - by Sj
    I have an NSMutableArray of custom views (that are pretty much 1 UITextView and 1 UILabel with a custom back ground image), these are created as they are need (I start with 2 (though the first one is only 2 UITextFields and the other is normal) of these). Now my issue here seems to be this: as soon as I try to edit any UITextView past the one in the 2nd view, it starts to run incredibly slow, not the app, just the textview. For example, as I type, the little blinky guy lags behind the text and when I click to copy/paste/cut/etc you can see the little balloon fly in from the upper left corner every time. I have run the static analyzer for leaks and come up with nothing and run it alongside some other the testing software in XCode and it does not appear to have any reason for this. Any help would be greatly appreciated.

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  • UITextView in UITableViewCell scrolling problems.

    - by jrtc27
    Ok. I have made a custom cell for my table, and it contains a text view. When I have multiple lines in the text view, I can scroll up and down, but in doing this the table also scrolls. How can I stop this behaviour? If anyone needs parts of my code or further details, please just ask. I am more than willing. Thank you for your help

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  • Pass Result of ASIHTTPRequest "requestFinished" Back to Originating Method

    - by Intelekshual
    I have a method (getAllTeams:) that initiates an HTTP request using the ASIHTTPRequest library. NSURL *httpURL = [[[NSURL alloc] initWithString:@"/api/teams" relativeToURL:webServiceURL] autorelease]; ASIHTTPRequest *request = [[[ASIHTTPRequest alloc] initWithURL:httpURL] autorelease]; [request setDelegate:self]; [request startAsynchronous]; What I'd like to be able to do is call [WebService getAllTeams] and have it return the results in an NSArray. At the moment, getAllTeams doesn't return anything because the HTTP response is evaluated in the requestFinished: method. Ideally I'd want to be able to call [WebService getAllTeams], wait for the response, and dump it into an NSArray. I don't want to create properties because this is disposable class (meaning it doesn't store any values, just retrieves values), and multiple methods are going to be using the same requestFinished (all of them returning an array). I've read up a bit on delegates, and NSNotifications, but I'm not sure if either of them are the best approach. I found this snippet about implementing callbacks by passing a selector as a parameter, but it didn't pan out (since requestFinished fires independently). Any suggestions? I'd appreciate even just to be pointed in the right direction. NSArray *teams = [[WebService alloc] getAllTeams]; (currently doesn't work, because getAllTeams doesn't return anything, but requestFinished does. I want to get the result of requestFinished and pass it back to getAllTeams:)

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  • MPMoviePlayerController problem at start

    - by Infinity
    Hello guys! I have a problem with MPMoviePlayerController, because when I start it in fullscreen it exists, but the song is still playing. I added the MPMoviePlayerDidExitFullscreenNotification notification and it says that when the video starts playin it exists the full screen. Here's my code: _multimediaPlayer = [[MPMoviePlayerController alloc] init]; _multimediaPlayer.controlStyle = MPMovieControlStyleDefault; _multimediaPlayer.initialPlaybackTime = 0; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(videoPlayBackDidFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(videoPlayerDidExitFullscreen:) name:MPMoviePlayerDidExitFullscreenNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(videoPlayerPlaybackStateChanged:) name:MPMoviePlayerPlaybackStateDidChangeNotification object:nil]; NSString *path = [NSString stringWithFormat:@"%@/mag_%d/%@", [FMUtils documentsFolderPathWithFile:nil], _magID, _pageObject.fileName]; if ([FMUtils fileExistsAtPath:path]) { _multimediaPlayer.contentURL = [NSURL fileURLWithPath:path]; } else { _multimediaPlayer.contentURL = [NSURL URLWithString:[NSString stringWithFormat:@"%@%@", self.dataURL, _pageObject.fileName]]; } CGSize objectViewSize = self.frame.size; _multimediaPlayer.view.frame = CGRectMake(0, 0, objectViewSize.width, objectViewSize.height); [self addSubview:_multimediaPlayer.view]; if (_pageObject.blink) { [_multimediaPlayer setFullscreen:YES animated:YES]; } [_multimediaPlayer play]; Most of the time it happens when the video is not downloaded and it needs to stream it. Do you have any idea why is this happen?

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  • Why are my CATransitions acting up?

    - by Regan
    I am using the following code to switch between views with CATransition. CATransition *applicationLoadViewIn = [CATransition animation]; [applicationLoadViewIn setDuration:20]; [applicationLoadViewIn setType:kCATransitionPush]; [applicationLoadViewIn setSubtype:kCATransitionFromTop]; [applicationLoadViewIn setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn]]; ViewToSwitchTo *myviewcontroller = [[ViewToSwitchTo alloc] init]; [self.view.layer addAnimation:applicationLoadViewIn forKey:kCATransitionPush]; [self.view addSubview:myviewcontroller.view]; It functions mostly how I want it to. It pushes from the top like it should, however it for some reason acts strangely. First, the view I am switching to starts coming in from the bottom like it should, but for some reason, the view that I am switching FROM appears over the top of it with low opacity, so you see both of them. However, you also see the view that is coming in, shifted maybe 100 pixels upwards, on top of itself and the other view, once again with low opacity. Just before the halfway point of the the transition, everything works fine, you only see the view that is coming in and the view going out, doing what they should be doing. But slightly after the halfway point, the view I am switching to appears in its final destination, under the view I am switching from, and the view I am switching from has been reduced in opacity. What is going on here?

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  • Can't access annotation property of subclassed uibutton

    - by Tzur Gazit
    I have a mapView to which I add annotations. The pin's callout have a button (rightCalloutAccessoryView). In order to be able to display various information when the button is pushed, i've subclassed uibutton and added a class called "Annotation". @interface CustomButton : UIButton { NSIndexPath *indexPath; Annotation *mAnnotation; } @property (nonatomic, retain) NSIndexPath *indexPath; @property (nonatomic, copy) Annotation *mAnnotation; - (id) setAnnotation2:(Annotation *)annotation; @end Here is "Annotation": @interface Annotation : NSObject <MKAnnotation> { CLLocationCoordinate2D coordinate; NSString *mPhotoID; NSString *mPhotoUrl; NSString *mPhotoName; NSString *mOwner; NSString *mAddress; } @property (nonatomic, assign) CLLocationCoordinate2D coordinate; @property (nonatomic, copy) NSString *mPhotoID; @property (nonatomic, copy) NSString *mPhotoUrl; @property (nonatomic, copy) NSString *mPhotoName; @property (nonatomic, copy) NSString *mOwner; @property (nonatomic, copy) NSString *mAddress; - (id) initWithCoordinates:(CLLocationCoordinate2D)coordinate; - (id) setPhotoId:(NSString *)id url:(NSString *)url owner:(NSString *)owner address:(NSString *)address andName:(NSString *)name; @end I want to set the annotation property of the uibutton at - (MKAnnotationView *)mapView:(MKMapView *)pMapView viewForAnnotation:(id )annotation, in order to refer to it at the button push handler (-(IBAction) showDetails:(id)sender). The problem is that I can't set the annotation property of the button. I get the following message at run time: 2010-04-27 08:15:11.781 HotLocations[487:207] *** -[UIButton setMAnnotation:]: unrecognized selector sent to instance 0x5063400 2010-04-27 08:15:11.781 HotLocations[487:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[UIButton setMAnnotation:]: unrecognized selector sent to instance 0x5063400' 2010-04-27 08:15:11.781 HotLocations[487:207] Stack: ( 32080987, 2472563977, 32462907, 32032374, 31884994, 55885, 30695992, 30679095, 30662137, 30514190, 30553882, 30481385, 30479684, 30496027, 30588515, 63333386, 31865536, 31861832, 40171029, 40171226, 2846639 ) I appreciate the help. Tzur.

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  • Simply if Statement for checking co-ordinate square.

    - by JonB
    I have an UIImageView and taking the raw touch input. I need to check if a touch is within a certain set of squares. At the moment... I have this if statement.... if(46 < touchedAt.x && touchedAt.x < 124 && 18 < touchedAt.y && touchedAt.y < 75) but I have tried to simplify it to this one... if(46 < touchedAt.x < 124 && 18 < touchedAt.y < 75) It didn't work. Is it possible to simplify like this or am I stuck with the slightly lengthier version at the top? Is there a reason why the types of comparisons in the bottom if don't work? Many Thanks.

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