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  • AppDelegate viewController memory leak?

    - by fuzzygoat
    I am just curious with regards to the correct way to create a view controller programatically. When I compile this code with the static analyser I get a leak (as you would expect) from the alloc. Should I just leave it as it needs to stay until the app exits anyways, or is there a cleaner way? - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { NSLog(@"UIApplication application:"); RectViewController *myController = [[RectViewController alloc] init]; [window addSubview:[myController view]]; [window makeKeyAndVisible]; return YES; } cheers Gary

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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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  • show UIAlertView when In app purchase is in progress

    - by edie
    Hi... I've added an UIAlertView that has UIActivityIndicatior as a subview on my application. This alertView only show when the purchase is in progress. I've put my alert view in this way in my StoreObserver: - (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions { for (SKPaymentTransaction *transaction in transactions) { switch (transaction.transactionState) { case SKPaymentTransactionStatePurchasing: [self stillPurchasing]; // this creates an alertView and shows break; case SKPaymentTransactionStatePurchased: [self completeTransaction:transaction]; break; case SKPaymentTransactionStateFailed: [self failedTransaction:transaction]; break; case SKPaymentTransactionStateRestored: [self restoreTransaction:transaction]; break; default: break; } } } - (void) stillPurchasing { UIAlertView *alert = [[UIAlertView alloc]initWithTitle: @"In App Purchase" message: @"Processing your purchase..." delegate: nil cancelButtonTitle: nil otherButtonTitles: nil]; self.alertView = alert; [alert release]; UIActivityIndicatorView *ind = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle: UIActivityIndicatorViewStyleWhiteLarge]; self.indicator = ind; [ind release]; [self.indicator startAnimating]; [self.alertView addSubview: self.indicator]; [self.alertView show]; } When I tap my the buy button this UIAlertView shows together with my UIActivityIndicator.. But when the transaction completes the alertView still on the top of the view and the Indicator was the only one that was removed. My question was how should I release the alertView? Or where/When should I release it. I've added these command to release my alertView and Indicator on these cases: case SKPaymentTransactionStatePurchased: case SKPaymentTransactionStateFailed: case SKPaymentTransactionStateRestored: [self.indicator stopAnimating]; [self.indicator removeFromSuperview]; [self.alertView release]; [self.indicator release]; I've only added the alertView to show that the purchasing was still in progress. Any suggestion to create any feedback to users will be thankful for me.. Thanks

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  • Passing a string representing my format specifier into stringWithFormat and seeing issues

    - by Jeff
    If I call "[NSString stringWithFormat:@"Testing \n %@",variableString]"; I get what I would expect, which is Testing, followed by a new line, then the contents of variableString. However, if i try NSString *testString = @"Testing \n %@"; //forgive shorthand here [NSString stringWithFormat,testString,variableString] the output actually literally writes \n to the screen instead of a newline. any workaround to this? seems odd to me

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  • Do I need to use decimal places when using floats? Is the "f" suffix necessary?

    - by Paulo Fierro
    I've seen several examples in books and around the web where they sometimes use decimal places when declaring float values even if they are whole numbers, and sometimes using an "f" suffix. Is this necessary? For example: [UIColor colorWithRed:0.8 green:0.914 blue:0.9 alpha:1.00]; How is this different from: [UIColor colorWithRed:0.8f green:0.914f blue:0.9f alpha:1.00f]; Does the trailing "f" mean anything special? Getting rid of the trailing zeros for the alpha value works too, so it becomes: [UIColor colorWithRed:0.8 green:0.914 blue:0.9 alpha:1]; So are the decimal zeros just there to remind myself and others that the value is a float? Just one of those things that has puzzled me so any clarification is welcome :)

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  • Managing several hundred occurrences of NSLocalizedString

    - by Gordon Hughes
    My application has several hundred points of localisation, some of which can be reused many times. To prevent from hunting and pecking through code to find occurrences of a particular NSLocalizedString, I create a macro for each in a header file using the #define preprocessor directive. For example: #define kLocFirstString NSLocalizedString(@"Default Text", @"Comment") #define kLocSecondString NSLocalizedString(@"More Text", @"Another comment") ... When I want to refer to a particular string, I do so by its macro name. This method has been working nicely for me, but I'm concerned that such blatant abuse of #define is frowned upon. From the standpoint of "correctness", should I just inline each NSLocalizedString with the code, or is there another method (extern NSString *aString; perhaps?) that I can use to collect the declarations in one place?

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  • Prevent subview from scrolling in a UIScrollView

    - by jbrennan
    I have a UIScrollView subclass with a certain subview I'd like to prevent from scrolling (while all the other subviews scroll as normal). The closest example to this I can think of is UITableView's "index strip" on the right side (look in the Contacts app to see an example). I am guessing this is a subview of the table (scrollview) but it does not move as the user scrolls. I can't seem to make my subview stay put! How can I accomplish this?

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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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  • How to release memory created from CFStringTokenizerCreate?

    - by Boon
    I use CFRelease to release the CFStringTokenizerRef obtained from CFStringTokenizerCreate call. But instruments is reporting memory leak at around this area. Am I missing something? CFStringTokenizerRef tokenRef = CFStringTokenizerCreate(NULL, (CFStringRef)contents, CFRangeMake(0, contents.length), kCFStringTokenizerUnitWordBoundary, NULL); CFStringTokenizerTokenType tokenType; // leak reported here while ((tokenType = CFStringTokenizerAdvanceToNextToken(tokenRef)) != kCFStringTokenizerTokenNone) } CFRelease(tokenRef);

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  • Using memcpy/memset

    - by Andrew Coad
    When using memset or memcpy within an Obj-C program, will the compiler optimise the setting (memset) or copying (memcpy) of data into 32-bit writes or will it do it byte by byte?

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  • Memory problem with basic UITableView when scrolling

    - by Sheehan Alam
    I have a very simple UITableView that has 3 sections, and 3 rows per section. #pragma mark - #pragma mark UITableView delegate methods - (NSInteger)tableView:(UITableView *)tblView numberOfRowsInSection:(NSInteger)section { return 3; } - (UITableViewCell *)tableView:(UITableView *)tblView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tblView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } // Configure the cell... return cell; } - (NSInteger)numberOfSectionsInTableView:(UITableView *)tblView { if (tblView == self.tableView) { return 3; } else { return 1; } } Everything shows up fine, but as soon as I scroll my application crashes and my debugger tells me: * -[ProfileViewController tableView:cellForRowAtIndexPath:]: message sent to deallocated instance 0x5ae61b0 I'm not exactly sure what I am doing wrong.

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  • How to check whether Application is Busy or not

    - by Chandan Shetty SP
    Hi, I am using "networkActivityIndicatorVisible" in UIApplication for showing network spinning gear in status bar if my WebView( I am setting "networkActivityIndicatorVisible = YES" in "webViewDidStartLoad" and reseting in "webViewDidFinishLoad" ) is busy. It works fine for single UIWebView. For Multiple UIWebViews i have used a "stack" to trace which webview is busy and which one is idle and it is working fine. My question is there is any way to know whether an application is busy or idle in application level(in UIApplication) instead of checking each webview so i can remove stack. Thanks.

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  • Should I release NSString before assigning a new value to it?

    - by Elliot Chen
    Hi, Please give me some suggestions about how to change a NSString variable. At my class, I set a member var: NSString *m_movieName; ... @property(nonatomic, retain) NSString *m_movieName; At viewDidLoad method, I assign a default name to this var: -(void)viewDidLoad{ NSString *s1 = [[NSString alloc] initWithFormat:@"Forrest Gump"]; self.m_movieName = s1; ... [s1 release]; [super viewDidLoad] } At some function, I want to give a new name to this var, so I did like: -(void)SomeFunc{ NSString *s2 = [[NSString alloc] initWithFormat:@"Brave Heart"]; //[self.movieName release]; // ??????? Should perform here? self.m_moiveName = s2; [s2 release]; } I know, NSString* var is just a pointer to an allocated memory block, and 'assign' operation will increment this memory block's using count. For my situation, should I release m_movieName before assigning a value to it? If I do not release it (via [self.movieName release]), when and where will the previous block be released? Thanks for your help very much!

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  • UITableView and keyboard scrolling problem

    - by Jonathan
    after a lot of trial and error, I'm giving up and asking the question. I've seen a lot of people with similar problems but can't get all the answers to work right. I have a UITableView which is composed of custom cells. The cells are made of 5 text fields next to each other (sort of like a grid). When I try to scroll and edit the cells at the bottom of the UITableView, I can't manage to get my cells properly positioned above the keyboard. I have seen many answers talking about changing view sizes,etc... but none of them has worked nicely so far. Could anybody clarify the "right" way to do this with a concrete code example? Thanks in advance, Jonathan

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  • Items mixed up after scrolling in UITableView

    - by jean
    When I scroll in my UITableView, the cells become mixed up. What am I doing wrong? This is my method: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } [cell insertSubview:[itemArray objectAtIndex:indexPath.row] atIndex:indexPath.row]; return cell; } Update It now works by using cell.contentView, but now when I select an item, the selected one is overlayed with the content of a different cell...

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  • Detect if certain UIView was touched amongst other UIViews

    - by Rudiger
    HI Guys, Sorry if this has been answered elsewhere but I can't seem to get it to work. I have 3 UIViews, layered on top of one large uiview. I want to know if the user touches the top one and not care about the other ones. I will have a couple of buttons in the second UIView and a UITable in the 3rd UIView. Problem is I turn userInteractionEngabled on on the first view and that works, but all the other views respond in the same way even if I turn it off. If I disable userInteractionEnabled on self.view none of them respond. I also can't detect which view was touched in the touchesBegan delegate method. my code: UIView *aView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 150)]; aView = userInteractionEnabled = YES; [self.view addSubview:aView]; UIView *bView = [[UIView alloc] initWithFrame:CGRectMake(0, 150, 320, 50)]; bView.userInteractionEnabled = NO; [self.view addSubview:bView]; -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { //This gets called for a touch anywhere } Thanks for any help.

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  • Can I load multiple UIViewControllers that each kick off their own NSURLConnections?

    - by RexOnRoids
    My Rootviewcontroller uses NSURLConnection to get data from a server, and then, based on this data, loads a bunch (like 7) of smaller UIViewControllers that each also use their own NSURLConnection to get some more specific data from the server. But, the problem is, only the RooTViewController is recieving callbacks from: - (void)connectionDidFinishLoading:(NSURLConnection *)theConnection the other UIViewControllers never get callbacks...

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  • objective-c : @synchronized how it works ?

    - by g.revolution
    Hi, i have two methods -(void) a { @synchronized(self) { // critical section 1 } } -(void) b { @synchronized(self) { // critical section 2 } } now my question is if a thread is in critical section 1. will the critical section 2 be locked for other threads or other threads can access critical section 2.

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  • Any chance to get Core Data using Tokyo Cabinet as the persistent store?

    - by dontWatchMyProfile
    I watched a free high quality video with Aaron Hillegass about Core Data vs Tokyo Cabinet. Besides that this guy is amazingly funny (really, if you want to laugh now, watch it!), he shows off Tokyo Cabinet beeing about 40x faster than Core Data. I wonder if it's worth thinking about how to attach this to Core Data? Does that make any sense? Maybe as a custom atomic store or something like this?

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