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  • Background color remaining when switching views

    - by Guy
    Hi Guys. I have a UIViewController named equationVC who's user interface is being programmatically created from another NSObject class called equationCon. Upon loading equationVC, a method called chooseInterface is called from the equationCon class. I have a global variable (globalVar) that points to a user defined string. chooseInterface finds a method in the equationCon class that matches the string globalVar points to. In this case, let's say that globalVar points to a string that is called "methodThatMatches." In methodThatMatches, another view controller needs to show the results of what methodThatMatches did. methodThatMatches creates a new equationVC that calls upon methodThatMatches2. As a test, each method changes the color of the background. When the application starts up, I get a purple background, but as soon as I hit backwards I get another purple screen, which should be yellow. I do not think that I am release the view properly. Can anyone help? -(void)chooseInterface { NSString* equationTemp = [globalVar stringByReplacingOccurrencesOfString:@" " withString:@""]; equationTemp = [equationTemp stringByReplacingOccurrencesOfString:@"'" withString:@""]; SEL equationName = NSSelectorFromString(equationTemp); NSLog(@"selector! %@",NSStringFromSelector(equationName)); if([self respondsToSelector:equationName]){ [self performSelector:equationName]; } } -(void)methodThatMatches{ self.equationVC.view.backgroundColor = [UIColor yellowColor]; [setGlobalVar:@"methodThatMatches2"]; EquationVC* temp = [[EquationVC alloc] init]; [[self.equationVC navigationController] pushViewController:temp animated:YES ]; [temp release]; } -(void)methodThatmatches2{ self.equationVC.view.backgroundColor = [UIColor purpleColor]; }

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  • NSMutableArray: count is a method or a property?

    - by Rafael Oliveira
    I want to verify if I'm in the last cell of the UITable. Should I use a NSInteger property in my controller and store the value of the count of the data (it's an NSMutableArray) that populates the table? I'm asking because I don't know if count iterates over all objects of the array to count or if it only gets me a value of a count property. What would be better ? store the value: myCount = [myArray count] use directly: [myArray count] store numberOfRows: myCount = numberOfRowsInSection:[indexPath 0] use numberOfRows directly: numberOfRowsInSection:[indexPath 0]

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  • How to make UIImagePickerController works under switch case UIActionSheet

    - by Phy
    -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { UIImage *tempImage = [info objectForKey:UIImagePickerControllerOriginalImage]; imgview.image = tempImage; [self dismissModalViewControllerAnimated:YES]; [picker release]; } -(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker { [self dismissModalViewControllerAnimated:YES]; [picker release]; } -(IBAction) calllib { img1 = [[UIImagePickerController alloc] init]; img1.delegate = self; img1.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; [self presentModalViewController:img1 animated:YES]; } all the codes above works well for taking out photos from the photo library. problem is that when i tried to use it under the UIActionSheet it does not work. i just copy the lines of codes from the -(IBAction) calllib as follow. (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { UIImage *detectface = [Utilities detectFace:imgview.image]; UIImage *grayscale = [Utilities grayscaleImage:imgview.image]; UIImage *avatars = [Utilities avatars:imgview.image]; img1 = [[UIImagePickerController alloc] init]; img1.delegate = self; img1.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; switch (buttonIndex) { case 0: [self presentModalViewController:img1 animated:YES]; imgview.image = detectface; break; case 1: [self presentModalViewController:img1 animated:YES]; imgview.image = grayscale; break; case 2: [self presentModalViewController:img1 animated:YES]; imgview.image = avatars; break; default: break; } } it does not work. can somebody help me to figure out what is the problem? the switch case works perfectly without the [self presentModalViewController:img1 animated:YES]; ... thanks

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  • UIPickerView crashing when switching segemented control

    - by Mattog1456
    Hello, I have four NSDictionaries that I would like to use to populate a pickerview depending on a segemented control. With the code I have, the first segmented control/pickerview works fine but when I switch to the second segment the picker view only loads part of the second dictionary, that is it loads the same number of rows as it counted in the first dictionary. When I change the segmented control to the third or fourth segment it simply crashes with a sigabrt error indicating that it cannot index item43 when only 27 exist. This I suspect stems from a UItextfield population based on the upickerview row and object. I think the problem is with the way I have the data source and delegate set up. #pragma mark - #pragma mark UIPickerViewDelegate - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { if ([wine selectedSegmentIndex] == 0) { return [robskeys objectAtIndex:row]; } if ([wine selectedSegmentIndex] == 1) { return [esabskeys objectAtIndex:row]; } if ([wine selectedSegmentIndex] == 2) { return [lebskeys objectAtIndex:row]; } else if ([wine selectedSegmentIndex] == 3) { return [sbskeys objectAtIndex:row]; } return @"Unknown title"; } #pragma mark - #pragma mark UIPickerViewDataSource - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { return 1; } - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { if ([wine selectedSegmentIndex] == 0) { return robskeys.count; } if ([wine selectedSegmentIndex] == 1) { return esabskeys.count; } if ([wine selectedSegmentIndex] == 2) { return lebskeys.count; } else if ([wine selectedSegmentIndex] == 3) { return sbskeys.count; } return 1; } #pragma mark - Any help would be much appreciated Thank you

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  • COCOS2D - Animation Stops During Move

    - by maiko
    Hey guys! I am trying to run a "Walk" style animation on my main game sprite. The animations work fine, and my sprite is hooked up to my joystick all fine and dandy. However, I think where I setup the call for my walk animations are wrong. Because everytime the sprite is moving, the animation stops. I know putting the animation in such a weak if statement is probably bad, but please tell me how I could get my sprite to animate properly while it is being moved by the joystick. The sprite faces the right direction, so I can tell the action's first frame is being called, however, it doesn't animate until I stop touching my joystick. Here is How I call the action: //WALK LEFT if (joypadCap.position.x <= 69 /*&& joypadCap.position.y < && joypadCap.position.y 40 */ ) { [tjSprite runAction:walkLeft]; }; //WALK RIGHT if ( joypadCap.position.x = 71 /* && joypadCap.position.y < 100 && joypadCap.position.y 40 */) { [tjSprite runAction:walkRight]; }; THIS: is the how the joystick controls the character: CGPoint newLocation = ccp(tjSprite.position.x - distance/8 * cosf(touchAngle), tjSprite.position.y - distance/8 * sinf(touchAngle)); tjSprite.position = newLocation; Please help. Any alternative ways to call the characters walk animation would be greatly appreciated!

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  • How to use the debugger with nested static libraries in XCode?

    - by EightyEight
    Hi all, A project that I've inherited has the following structure: Project A produces a static library. Project B produces a static library and links with library A. Project C produces the executable and links with library B. When I run app in debug mode, I can successfully debug code within the executable (project C) and the static library from project B. I can't, however, debug anything in the Project A library -- my breakpoints are ignored. I've checked and made sure that debug symbols are enabled and not stripped. Is there something else I'm missing? Thanks

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  • Location of my own directories

    - by Nicsoft
    Hello, I am trying to understand how to create my own directory tree and access it from my application. I am doing some kind of learning program and want to create a directory structure like this: -MyLessonsDirectory --LessonDirectory_1 ---Step_1 ---Step_2 ---Step_3 --LessonDirectory_2 ---Step_1 ---Step_2 ---Step_3 . . and so on In each "Step"-directory I will have specific content for that step of the lesson. The content is added by me while developing. Hence, I don't want to create the structure and content from within the application, just access it and reading the content of the directories. If I can create this kind of structure and use it it will be very easy to create a nice design that makes it easy to create new lessons in my app. What I cannot figure out is where I should create those directories in the file-structure in xCode and what is the path to those directories from my application. Thanks in advance!

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  • Facebook writing on a wall problem - retrieves only null value.

    - by Viral
    hi all friends, I am making a game application in that I want to pass my score on wall of face book. I've completed all the things (the log in and message passing part) but when I passes the score via global variable, I am getting only null as a value and not the score that I want. Is there any way to pass data or string to Face book and write on a wall? My code is (void)viewDidLoad { static NSString* kApiKey = @"be60415be308e2b44c0ac1db83fe486b"; static NSString* kApiSecret = @"4f880c7e100321f808c41b1d3c813dfa"; _session = [[FBSession sessionForApplication:kApiKey secret:kApiSecret delegate:self] retain]; score = [NSString stringWithFormat:@"%@",appDelegate.myTextView]; [_session resume]; [super viewDidLoad]; } whre score is NSString and myTextView is NSString in other viewcontrollerfile, And appDelegate is global variable. Any help?? thanks in advance.

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  • Why is my UITableView not being set?

    - by Jamie L
    I checked using the debbuger in the viewDidLoad method and tracerTableView is 0x0 which i assume means it is nil. I don't understand. I should go ahaed say yes I have already checked my nib file and yes all the connections are correct. Here is the header file and the begging of the .m. ///////////// .h file //////////// @interface TrackerListController : UITableViewController { // The mutable (modifiable) dictionary days holds all the data for the days tab NSMutableArray *trackerList; UITableView *tracerTableView; } @property (nonatomic, retain) NSMutableArray *trackerList; @property (nonatomic, retain) IBOutlet UITableView. *tracerTableView; //The addPackage: method is invoked when the user taps the addbutton created at runtime. -(void) addPackage : (id) sender; @end /////////////////////////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////// .m file ////////////////////////////////////// @implementation TrackerListController @synthesize trackerList, tracerTableView; (void)viewDidLoad { [super viewDidLoad]; self.title = @"Package Tracker"; self.navigationItem.leftBarButtonItem = self.editButtonItem; UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addPackage:)]; // Set up the Add custom button on the right of the navigation bar self.navigationItem.rightBarButtonItem = addButton; [addButton release]; // Release the addButton from memory since it is no longer needed }

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  • UIImagePickerController random behavior

    - by pion
    I have the following code snippets: @interface PinRecordNewTableViewController : UITableViewController { } ... @implementation PinRecordNewTableViewController ... - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { ... PinRecordNewPicture *pinRecordNewPicture = [[PinRecordNewPicture alloc] initWithNibName:@"PinRecordNewPicture" bundle:nil]; pinRecordNewPicture.delegate = self; [self.navigationController pushViewController:pinRecordNewPicture animated:YES]; [pinRecordNewPicture release]; ... } @interface PinRecordNewPicture : UIViewController ... @implementation PinRecordNewPicture ... - (void)picturePicker:(UIImagePickerControllerSourceType)theSource { UIImagePickerController *picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.sourceType = theSource; picker.allowsEditing = YES; [self presentModalViewController:picker animated:YES]; [picker release]; } - (IBAction) takePicture:(id)sender { UIImagePickerControllerSourceType source = UIImagePickerControllerSourceTypeCamera; if ([UIImagePickerController isSourceTypeAvailable:source]) { [self picturePicker:source]; } It works 80% of the time -- I could get the picture correctly. The problem is that it occasionally failed to take a picture. When tracing the code, I found out that it occasionally goes to -PinRecordNewTableViewController:viewDidUnload. This is where it fails because it set nil to all ivars. What did I do wrong? Did I miss something so it behaves "randomly"? Thanks in advance for your help.

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  • selecting a row by means of a button ... using didSelectRowAtIndexPath

    - by John Smith
    hey people , I have a question concerning a button I would like to create which selects my previous selected row. This is what I came up so far but since I'm new with the functionality and such I could definately use some pointers I created a toolbar with a button and behind this button is the following action. -(void)clickRow { selectedRow = [self.tableView indexPathForSelectedRow]; [self.tableView:[self tableView] didSelectRowAtIndexPath:selectedRow]; } in my didSelectRowAtIndexPath there is a rootViewController being pushed rvController = [RootViewController alloc] ...etc So what I would like is my function clickRow to select the row and push the new rootviewcontroller (which has the right info since I'm using a tree ). I tried something like this as well -(void)clickRow { NSDictionary *dictionary = [self.tableDataSource objectAtIndex:indexPath.row]; NSArray *Children = [dictionary objectForKey:@"Children"]; rvController = [[RootViewController alloc] initWithNibName:@"RootViewController" bundle:[NSBundle mainBundle]]; rvController.CurrentLevel += 1; rvController.CurrentTitle = [dictionary objectForKey:@"Title"]; [self.navigationController pushViewController:rvController animated:YES]; rvController.tableDataSource = Children; [rvController release]; } The last function works a little but a little is not enough;) For instance if I press the middle row or any other it constantly selects the toprow. thnx all for those of you reading and trying to help

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  • IB Linking iPad SplVC table view

    - by Sam Jarman
    hey guys When you have an iPad Project, and you want to put a table view in your landscape view... I did this i dragged in a UITableView. but what do you 'hook' the data source to? there are about 3 options that all seem to crahing for me... when not hooked up, app launches fine. Any help would be appreciated. Cheers Sam

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  • How to get a reference to a control in the view?

    - by Kevin
    If I have a UIScrollView set up in the view via the Interface Builder, how do I get a reference to it in the ViewController implementation? I want to programmatically add labels to the scroll view. For example, in C# if you have a textbox declared in the UI/form, you can access it by simply using the ID declared for that textbox. It doesn't seem this simple in objective c. Thanks Kevin

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  • MKMapKit exception when using canShowCallout on annotation view

    - by Kendall Helmstetter Gelner
    I'm trying to use a pretty straightforward custom map annotation view and callout - the annotation view when I create it, just adds a UIImageView as a subview to itself. That works fine. However, when I call canShowCallout on the annotation view, An exception is thrown in MapKit immediately after returning the view. The end of the stack looks like: #0 0x94e964e6 in objc_exception_throw #1 0x01e26404 in -[MKOverlayView _addViewForAnnotation:] #2 0x01e22037 in -[MKOverlayView _addViewsForAnnotations:animated:] #3 0x01e1ddf9 in -[MKOverlayView showAddedAnnotationsAnimated:] #4 0x01df9c0e in -[MKMapView _showAddedAnnotationsAndRouteAnimated:] #5 0x01e0371a in -[MKMapView levelView:didLoadTile:] My viewForAnnotation is pretty simple: - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation { if ( ! [annotation isKindOfClass:[MyAnnotation class]] ) return nil; MyAnnotationView *useView = (MyAnnotationView *)[myMapView dequeueReusableAnnotationViewWithIdentifier:@"resuseview"]; if ( useView == nil ) { useView = [[[MyAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"resuseview"] autorelease]; useView.canShowCallout = YES; // if commented out view appears just fine } else { useView.annotation = annotation; } return useView; } As noted in the code, the annotation view works fine as is - until I add canShowCallout, then it crashes the first time the map gets the view.

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  • Does the type in this KVC validation method matter?

    - by dontWatchMyProfile
    For example, in the docs a KVC-style validation method is implemented like this: -(BOOL)validateAge:(id *)ioValue error:(NSError **)outError They used id* as the type for ioValue. Since that's not part of the method signature, I wonder if it would hurt to do something like: -(BOOL)validateAge:(NSNumber *)ioValue error:(NSError **)outError Is this still fine with KVC?

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  • Simple sound effect loop using AudioToolKit

    - by Typeoneerror
    I've created a few sounds for use in my game. I can play them at certain events without issue: // create sounds CFBundleRef mainBundle; mainBundle = CFBundleGetMainBundle(); _soundFileShake = CFBundleCopyResourceURL(mainBundle, CFSTR("shake"), CFSTR("wav"), NULL); AudioServicesCreateSystemSoundID(_soundFileShake, &_soundIdShake); // later... AudioServicesPlaySystemSound(_soundIdShake); The game has a mechanism which allows you to shake the device to activate some functionality. I've got the shaking code done so I get get a "shaking started" and "shaking ended" message to my game. What I need to have happen is start playing "shave.wav" when shaking starts and loop it until it stops. Is there a way to do this with AudioToolbox/AudioServices? How could I do this if not?

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  • Selection on table view causes parent view to change

    - by Tereno
    Hi there, I'm working on an iPad app and here's my scenario: I have a view which contains a table view inside of it. When the user selects an item on the table view, I would like the parent's view to change in a navigational manner. For those of you that have an iPad, this would be akin to the "Settings" app. But I guess in the "Settings" app, the right pane is composed of a grouped table view right? Is what I'm trying to do possible? Thanks

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  • -(void)dealloc - How ? Objective - C

    - by sagar
    Please Note that - this is not similar than this question. OK. To understand my question, First of all please see both of these destructors. - (void)dealloc { [Marketdetails release]; Marketdetails=nil; [parsedarray release]; parsedarray=nil; [Marketid release]; Marketid=nil; [marketname release]; marketname=nil; [super dealloc]; } - (void)dealloc { [super dealloc]; [Marketdetails release]; Marketdetails=nil; [parsedarray release]; parsedarray=nil; [Marketid release]; Marketid=nil; [marketname release]; marketname=nil; } See, Both destructors have different code. In First Destructor first current class objects are released & then [super dealloc] is called. In second Desctructor first [super dealloc] is called. My question is as follows. Where should we write [super dealloc] ? first or last ? or it doesn't matter ?

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  • Urban Airship - not receivng push notifications on device?

    - by Silent
    I just installed everything to my app and tried to push, but no messages appear. The token for my device is saved so that's working. When I push, the website says it sent, but no message are received on the device. Right now I'm using a production certificate for push notifications, with a developer provision and not the distribution certificate. I tried cleaning the build and reinstalling but no luck since an extra app was installed from the same one. I used the code that is on the sample file tutorial, I think that's all the details. Don't know what to do next.

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