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  • UIAlertView popups lock up keyboard actions

    - by TurbZ
    I have a strange behavior where if a UIAlert fires (like the one below) all subsequent keyboard or press behaviors are disabled / non responsive. Scrolling the screen still works but no action is fired from any button or keyboard presses. [[[[UIAlertView alloc] initWithTitle:@"Invalid Address" message:@"The email address you entered isn't valid. Please check and try again." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil] autorelease] show]; Anyone experienced this behavior before and can shed some light? Or maybe guide me in the right direction to debug it further to get to the root cause? Thank you heaps!

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  • Problem with class methods in objective c

    - by Rajashekar
    Hi Guys i have a tableview controller like so, NSString *selectedindex; @interface ContactsController : UITableViewController { NSMutableArray *names; NSMutableArray *phonenumbers; NSMutableArray *contacts; DatabaseCRUD *sampledatabase; } +(NSString *) returnselectedindex; @end in the implementation file i have +(NSString *) returnselectedindex { return selectedindex; } when a row is selected in the tableview i put have the following code. selectedindex = [NSString stringWithFormat:@"%d", indexPath.row]; NSLog(@"selected row is %@",selectedindex); in a different class i am trying to access the selectedindex. like so selected = [ContactsController returnselectedindex]; NSLog(@"selected is %@",selected); it gives me a warning: 'ContactsController' may not respond to '+returnselectedindex' and crashes. i am not sure why. i have used class methods previously lot of times , and never had a problem. any help please. Thank You.

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  • Validate NSString

    - by Chris
    I am validating an NSString to ensure that the string does not contain apostrophes. The code I'm using to do this is NSCharacterSet * invalidNumberSet = [NSCharacterSet characterSetWithCharactersInString:@"'"]; NSScanner * scanner = [NSScanner scannerWithString:string]; NSString * scannerResult; [scanner setCharactersToBeSkipped:nil]; [scanner scanUpToCharactersFromSet:invalidNumberSet intoString:&scannerResult]; if(![string isEqualToString:scannerResult]) { return 2; } Returning 2 represents an error. This code works, except for the case where the string is an apostrophe. To get around this issue, I added the following code above the preceding block. if([string isEqualToString:@"'"]); { return 2; } This code is evaluating to true, regardless of the input. I need to either prevent the first block from crashing with the input of ', or get the second block to work. What am I missing?

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  • Which icons/buttons to use for help, about, info?

    - by 4thSpace
    I use the info button to display a settings page. This page is a modal. I need another button from here to display "About" info, since I've already used "info" for something. I have a search form that is accessed only from the modal. On the search form, I need a help icon. I can use the info button but that seems confusing, since I already use the info button from the main view to access the modal. What else can I do for help and about icons/buttons?

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  • Are UIView's in TableViewCells cause for performance problems?

    - by iFloh
    Hi, I have a UITableView of UITableViewCells that so far performed well. I now aded a simple UIView to my UITableViewCell as a color indicator (backgroundColor only, no other content or attributes). Running the tableview again I realise scrolling is not as smooth as it used to be. The tableView suddenly also takes long time (~1+ secs) to come back again when returning from a subview (e.g. return from the view that gets pushed upon selection of a cell). Any ideas why the added UIView would be problematic? Why are the labels (being a subclass of UIView) not cause for similar issues?

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  • Wrong class type in objective C

    - by Max Hui
    I have a parent class and a child class. GameObjectBase (parent) GameObjectPlayer(child). When I override a method in Child class and call it using [myPlayerClass showNextFrame] It is calling the parent class one. It turns out in the debugger, I see the myPlayerClass was indeed class type GameObjectBase (which is the parent class) How come? GameObjectBase.h #import <Foundation/Foundation.h> #import "cocos2d.h" @class GameLayer; @interface GameObjectBase : NSObject { /* CCSprite *gameObjectSprite; // Sprite representing this game object GameLayer *parentGameLayer; */ // Reference of the game layer this object // belongs to } @property (nonatomic, assign) CCSprite *gameObjectSprite; @property (nonatomic, assign) GameLayer *parentGameLayer; // Class method. Autorelease + (id) initWithGameLayer:(GameLayer *) gamelayer imageFileName:(NSString *) fileName; // "Virtual methods" that the derived class should implement. // If not implemented, this method will be called and Assert game - (void) update: (ccTime) dt; - (void) showNextFrame; @end GameObjectPlayer.h #import <Foundation/Foundation.h> #import "GameObjectBase.h" @interface GameObjectPlayer : GameObjectBase { int direction; } @property (nonatomic) int direction; @end GameLayer.h #import "cocos2d.h" #import "GameObjectPlayer.h" @interface GameLayer : CCLayer { } // returns a CCScene that contains the GameLayer as the only child +(CCScene *) scene; @property (nonatomic, strong) GameObjectPlayer *player; @end When I call examine in debugger what type "temp" is in this function inside GameLayer class, it's giving parent class GameObjectBase instead of subclass GameObjectPlayer - (void) update:(ccTime) dt { GameObjectPlayer *temp = _player; [temp showNextFrame]; }

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  • Adding images to an array memory issue

    - by Friendlydeveloper
    Hello all, I'm currently facing the following issue: My app dynamically creates images (320 x 480 pixels) and adds them to a NSMutableArray. I need those images inside that array in order to allow users to browse through them back and forth. I only need to keep the latest 5 images. So I wrote a method like below: - (void)addImageToArray:(UIImage*)theImage { if ([myMutableArray count] < 5) { [myMutableArray addObject:theImage]; } else { [myMutableArray removeObjectAtIndex:0]; [myMutableArray addObject:theImage]; } } This method basically does what it's supposed to do. However, in instruments I can see, that memory usage is permanently incrementing. At some point, even though I do not have any memory leaks, the app finally crashes. The way I see it, XCode does remove the image from my array, but does not release it. Is there a way I can make sure, that the object I want to remove from my array will also get released? Maybe my approach is completely wrong and I need to find a different way. Any help appreciated. Thanks in advance

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  • UIWebView from Navigation Bar button

    - by Dixit
    Im having issue with button on a top right hand side of naviogation bar on iOS: I have a button that can launch a app.html file from app itself and show on top of current view and That popup webview can be minimize with dDone button on it, Im having issues doing this, How can i call UIWebView on top of current view and allow it to launch app.html page from app directory. Currently i have: - (BOOL)webView:(UIWebView *)webViewer shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{ } and this is a button that call that function UIBarButtonItem *showAppMenu = [[UIBarButtonItem alloc] initWithTitle:@"Help" style:UIBarButtonItemStylePlain target:self action:@selector(webView)];

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  • How to step inside NSManagedObject; access individual attributes.

    - by user300972
    NSManagedObject *entryObj = [self.fetchedResultsController objectAtIndexPath:indexPath]; entryObj consists of four String attributes. If I NSLog entryObj, I get the information I want. I cannot figure out how to access each of these properties individually. I read a similar post where the solution was to call "entity." I cannot figure out how to use "entity" to access a specific attribute. Any ideas? References? Tutorials? Thanks in advance.

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  • What does “@public” mean in Objective-C?

    - by Ty
    After reading a question on @private I understand how that works. However, since all variables default to @protected and you cannot really access a variable without defining an accessor, what exactly does @public do? When would you use it?

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  • UInavigationcontroller

    - by sudhakarilla
    Hello, I have a problem... In my navigationcontroller. i have not working navigationcontroller.its breakof setTitle doesnot follow and doesnot display of Title. -(void)viewDidLoad{ [self.setTitle=@"tableview"]; } Please help in this issue.

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  • UITable View Issue,

    - by abc
    hello i am having same issue, i tried your solution but it didnt help me in my case.. i am not getting exception but view is not getting changed.. my piece of code is as below printf("hi"); //Get the selected country NSString *selectedCountry = [listOfItems objectAtIndex:indexPath.row]; //Initialize the detail view controller and display it. DetailViewController *aSecondView = [[DetailViewController alloc] initWithNibName:@"DetailView" bundle:nil]; // aSecondView.selectedCountry = selectedCountry; [self.navigationController pushViewController:aSecondView]; [aSecondView release]; aSecondView = nil; printf("bye.."); both hi and bye gets printed but view doesnt change.. i have wasted 2 days around it .. plz help me out..

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  • memory management question -- releasing an object which has to be returned

    - by ulag
    Hi, I have an NSMutableArray called playlist. This is in a method called getAllPlaylists. The code is something like this: -(NSMutableArray *)getAllPlaylists { //playlist is an instance variable playlist = [[NSMutableArray alloc] init]; //memory leak here . . //some code here which populates the playlist array [playlist addObject: object1]; . . return playlist; } The array allocation step of playlist is causing a memory leak. In such a scenario where can i release this array? Or can i avoid allocation n initialization of playlist here by doing something else?

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  • will be assumed to return id

    - by Andrew_E
    I import oourafft.h and oourafft.m class, but get strange error while ooura initialize. OouraFFT * myFFT = [OouraFFT initForSignalsOfLength:1024 numberOfWindows:10]; OouraFFT may not respond to +initForSignalsOfLength: numberOfWindows Messages without matching method signature will be assumed to return 'id' and accept argument - Warning I think that it some kind of error import .h file

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