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  • "SecondViewController" may not respond to '-updatePlayerQueueWithMedia:' Messages without a matching

    - by Pavan
    I don't understand whats happening I get a warning that says "SecondViewController" may not respond to '-updatePlayerQueueWithMedia:' Messages without a matching signature will be assumed to return 'id' and accept '...' as arguments. this is my method - (void)mediaPicker: (MPMediaPickerController *) mediaPicker didPickMediaItems: (MPMediaItemCollection *) mediaItemCollection { [self dismissModalViewControllerAnimated: YES]; [self updatePlayerQueueWithMediaCollection: mediaItemCollection]; } And the actual method which ive written in the same page is - (void) updatePlayerQueueWithMediaCollection: (MPMediaItemCollection *) mediaItemCollection { //and shit happens here. } I don't understand whats happening can someone please help me get rid of this warning.

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  • iOS App with OCMaps crashes when using the phone in chinese Language

    - by Pedro Morte Rolo
    I've been given the task of doing maintenance to a iOS application that uses OCMapView. I have just realized that when using the application in chinese language, it blows up when the selector doClustering is invoked on a OCMapView instance. This is for me a very puzzling behaviour, because I thought that regardless of the environment language, the OCMapView class should allways have the same methods. Am I wrong? Do you have any recomentations about how to find a solution to this problem? Thank you, Pedro

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  • How to properly deal with KVO notifications when an managed object turns into a fault?

    - by dontWatchMyProfile
    From the docs: When Core Data turns an object into a fault, key-value observing (KVO) change notifications (see Key-Value Observing Programming Guide) are sent for the object’s properties. If you are observing properties of an object that is turned into a fault and the fault is subsequently realized, you receive change notifications for properties whose values have not in fact changed. So if an object turns into a fault, Core Data does send KVO notifications for changed properties? So I must always check for isFault == NO before beeing happy about the notification?

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  • Good Learning Method for Objective-C?

    - by Josh Kahane
    Hi I know this must be asked a millions times and can't be easy to answer as there is o definitive method, but any help would be appreciated, thanks. I have been playing around with all sorts of things in Xcode and with Objective-C, however I can't seem to find a good way of learning things in an efficient way. I have bought the book 'Programming in Objective-C 2.0' and its great but just lays down the basics it seems. I want to learn in the 2D game development direction, then of course 3D after nailing that, if thats the right thing to do? I am 17 currently in year 13, last year of school/A Levels and am almost definitely taking a gap year. Any good, well known reputable courses online or offline (real world)? This is my first programming language, and I am absolutely serious about learning this. One last question, is when learning things online, I have in the past started building a feature and learning a certain aspect in programming only to find out after adding more its slows down the app or its to inefficient. Is the key to use a certain method in a certain situation (being os many ways to do the same thing) or use any of those methods and refine it in your app to make it run smoothly? Sorry, its hard for me to know when I have little experience, thus far. Sorry for rambling on! I would appreciate any help, thank you!

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  • What's wrong with how I'm using NSDateFormatter?

    - by Thom Mahoney
    dateFormatter = [[NSDateFormatter alloc] init]; dateFormatter.locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"] autorelease]; [dateFormatter setDateFormat:@"EEE, d MMM yyyy HH:mm:ss zzz"]; NSString dateString = @"Tue, 08 Jun 2010 17:00:00 EDT"; NSDate eventDate = [dateFormatter dateFromString:dateString]; In this case the eventDate object is nil. Can somebody clue me in? This code used to work.

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  • Understanding byte order and functions like CFSwapInt32HostToBig

    - by Typeoneerror
    I've got an enumeration in my game. A simple string message with an appended PacketType is being sent with the message (so it knows what to do with the message) over GameKit WIFI connection. I used Apple's GKRocket sample code as a starting point. The code itself is working fantastically; I just want to understand what the line with CFSwapInt32HostToBig is doing. What on earth does that do? and why does it need to do it? My guess is that it's making sure the PacketType value can be converted to an unsigned integer so it can send it reliably, but that doesn't sound all that correct to me. The documentation states "Converts a 32-bit integer from big-endian format to the host’s native byte order." but I don't understand what the means really. typedef enum { PacketTypeStart, // packet to notify games to start PacketTypeRequestSetup, // server wants client info PacketTypeSetup, // send client info to server PacketTypeSetupComplete, // round trip made for completion PacketTypeTurn, // packet to notify game that a turn is up PacketTypeRoll, // packet to send roll to players PacketTypeEnd // packet to end game } PacketType; // .... - (void)sendPacket:(NSData *)data ofType:(PacketType)type { NSLog(@"sendPacket:ofType(%d)", type); // create the data with enough space for a uint NSMutableData *newPacket = [NSMutableData dataWithCapacity:([data length]+sizeof(uint32_t))]; // Data is prefixed with the PacketType so the peer knows what to do with it. uint32_t swappedType = CFSwapInt32HostToBig((uint32_t)type); // add uint to data [newPacket appendBytes:&swappedType length:sizeof(uint32_t)]; // add the rest of the data [newPacket appendData:data]; // Send data checking for success or failure NSError *error; BOOL didSend = [_gkSession sendDataToAllPeers:newPacket withDataMode:GKSendDataReliable error:&error]; if (!didSend) { NSLog(@"error in sendDataToPeers: %@", [error localizedDescription]); } }

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  • Anomalous results getting color components of some UIColors

    - by hkatz
    I'm trying to extract the rgb components of a UIColor in order to hand-build the pixels in a CGBitmapContext. The following sample code works fine for most of the UIColor constants but, confusingly, not all. To wit: CGColorRef color = [[UIColor yellowColor] CGColor]; const float* rgba = CGColorGetComponents(color); float r = rgba[0]; float g = rgba[1]; float b = rgba[2]; float a = rgba[3]; NSLog( @"r=%f g=%f b=%f a=%f", r, g, b, a); The results for [UIColor yellowColor] above are r=1.000000 g=1.000000 b=0.000000 a=1.000000, as expected. [UIColor redColor] gives r=1.000000 g=0.000000 b=0.000000 a=1.000000, again as expected. Similarly for blueColor and greenColor. However, the results for [UIColor blackColor] and [UIColor whiteColor] seem completely anomalous, and I don't know what I'm doing wrong (if indeed I am). To wit, [UIColor blackColor] gives r=0.000000 g=1.000000 b=0.000000 a=0.000000, which is a tranparent green, and [UIColor whiteColor] gives r=1.000000 g=1.000000 b=0.000000 a=0.000000, which is a transparent yellow. I'd appreciate it if somebody could either: (1) explain what I'm doing wrong (2) replicate my anomalous results and tell me it's not me, or (3) hit me over the head with a big hammer so it stops hurting so much. Howard

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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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  • how to balance position of UIBarButtonItem in toolbar

    - by RAGOpoR
    is it possible to balance the position of button(example toolbar in Safari)? UIBarButtonItem *infoButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCompose target:self action:@selector(support:)]; UIBarButtonItem *next = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemPlay target:self action:@selector(support:)]; [self.navigationController.toolbar setItems:[NSArray arrayWithObjects:infoButton, next,nil] animated:YES];

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  • how do i add two delegates to a ui element at run time?

    - by Michael Xu
    Hi everyone, im trying to implement some behaviors when a mapview element scrolls... by coding a delegate for the scrollview inside of a mapview. so, right now, i got a pointer to the scroll view used by the map view in my code. however, i wish to set the delegate of this scroll view inside the map view, but the issue is that the mapview already sets up a default delegate for this scroll view inside the map view. can i make my delegate implement all of the messages of the protocol, explicitly sending them to the mapview's default delegate while also implementing my own behaviors? how else can i go about adding my own delegate behavior, to an already existing default delegate....? thanks everyone, michael

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  • UIDatePicker in UIDatePickerModeCountDownTimer mode: how to get/set the hours and minutes via code?

    - by R31n4ld0
    Hello, guys. How to get/set the hours and minutes via code from a UIDatePicker in UIDatePickerModeCountDownTimer mode? The situation: I have an interface in that a user selects just hours and minutes. Then, he saves the information (so, I have to get the hours and minutes from UIDatePicker via code to save in a DB). When the user is editing the information saved previously, I want to start the interface with the saved hours/minutes (so, I have to set the UIDatePicker hours and minutes retrieved from DB via code). How do I do that with the UIDatePiker in UIDatePickerModeCountDownTimer mode? Thanks in advance.

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  • UINavigationController flashes white when I add it to a superview

    - by Chris Stamper
    Hey guys, I'm adding a NavigationController as a subview of my main view, with the flip animation (like a utility app/flipview thing). Here's how I'm doing it: [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:.7]; [UIView setAnimationTransition:([self.tableController.view superview] ? UIViewAnimationTransitionFlipFromLeft : UIViewAnimationTransitionFlipFromRight) forView:self.tableHostView cache:YES]; [self.tableController.view removeFromSuperview]; settingsView* backView1 = [[settingsView alloc] initWithNibName:@"settingsView" bundle:nil]; backView1.delegate = self; UINavigationController* settingsNavStack = [[UINavigationController alloc]initWithRootViewController:backView1]; [backView1 release]; settingsNavStack.view.frame = CGRectMake(0, 0, 320, 460); settingsNavStack.navigationItem.title = @"Settings"; [self setBackView:settingsNavStack]; [settingsNavStack release]; [self.tableHostView addSubview:self.backView.view]; [[self backView]setDelegate: self]; When it loads, the view comes in very nicely. However, the navigation bar stays white until like .2 secs after the animation finishes. Anyone know why the navigation bar wouldn't display right away?

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  • How to change rowHeight of a TableViewCell depending on Stringlength

    - by Jens Koehler
    I have a table with different entries, each with different length. The height of each row should fit, so it can show the whole string. I use the following code: //... cellForRowAtIndexPath if (row == 0) { cell = [tableView dequeueReusableCellWithIdentifier:@"affCell"]; //if (!cell) { cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:@"affCell"]autorelease]; cell.accessoryType = UITableViewCellAccessoryNone; cell.selectionStyle = UITableViewCellSelectionStyleNone; cell.autoresizingMask = UIViewAutoresizingFlexibleHeight; affL = [[UILabel alloc] initWithFrame:CGRectZero]; affL.textAlignment = UITextAlignmentLeft; affL.autoresizingMask = UIViewAutoresizingFlexibleHeight; [cell.contentView addSubview:affL]; //} //declaration label affL.text = [fDictionary objectForKey:@"aff"]; affL.numberOfLines = 0; [affL sizeToFit]; affL.frame = CGRectMake(15.0, 10.0, 220.0, affL.frame.size.height); CGFloat affLH = affL.frame.size.height; [tableView setRowHeight:affLH+30]; I also use //... heightForRowAtIndexPath return affL.frame.size.height; How can I fix this problem?

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  • Modifying UINavigation Bar Buttons in SubViews

    - by james
    I'm having trouble trying to modify the navigation bar in the subview portion of my application. self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(add_Clicked:)] autorelease]; I have no issues modifying the navigation bar in any of my UIViewControllers classes. The simplified application class outline is as such: AppDelegate - UIViewControllerA (has a left and a right navigationBarButton) - Subview is displayed when a SegmentControl is selected. (Within the subview, I'm trying to modify the right NavigationBarButton that is displayed) [self.view addSubview:newControllerName.view]; Methods I have attempted: Trying to set self.navigationItem.rightBarButtonItem within my subview to a new UIBarButtonItem. Creating a pointer to UIViewControllerA within my AppDelegate. The UIViewControllerA contains a function setNavButton I wrote to set the rightBarButtonItem to a button. Then I am referencing the AppDelegate's reference to UIViewControllerA and attempting to call setNavButton. I included a NSLog call to see if that function is being called and it is executing but the NavigationBar isn't being modified. I'm trying to avoid having to push a UIViewController after the SegmentControl is clicked in UIViewControllerA so that I can simulate the SegmentControl as tabs. I'm not getting any errors during compile or run time. Anyone have any ideas?

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  • xml parsing + tablew view tutorial needed

    - by shishir.bobby
    Hi all, i am working on live XML arsing, i am able to parse xml and pass into array,but i am not able to set those values into table view, so if any 1 can provide me some guideline or some tutorials to set array data into table view,with xml parsing,it will be a great heklp for me. regard shishir

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  • tableview - unrecognized selector sent to instance

    - by ct2k7
    Hi, I'v just got this error in my app. 2010-04-06 03:58:55.463 EasyPay DPS[6530:207] WARNING: Using legacy cell layout due to delegate implementation of tableView:accessoryTypeForRowWithIndexPath: in <NTItems: 0x397af90>. Please remove your implementation of this method and set the cell properties accessoryType and/or editingAccessoryType to move to the new cell layout behavior. This method will no longer be called in a future release. 2010-04-06 03:58:55.505 EasyPay DPS[6530:207] *** -[NTItems tableView]: unrecognized selector sent to instance 0x397af90 2010-04-06 03:58:55.515 EasyPay DPS[6530:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NTItems tableView]: unrecognized selector sent to instance 0x397af90' This error is extremely unuseful - where do I start in my code?

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  • CMBufferQueueCreate fail, required parameters?

    - by Agustin
    Reading the documentation about iOS SDK CMBufferQueueCreate, it says that getDuration and version are required, all the others callbacks can be NULL. but running the following code: CFAllocatorRef allocator; CMBufferCallbacks *callbacks; callbacks = malloc(sizeof(CMBufferCallbacks)); callbacks->version = 0; callbacks->getDuration = timeCallback; callbacks->refcon = NULL; callbacks->getDecodeTimeStamp = NULL; callbacks->getPresentationTimeStamp = NULL; callbacks->isDataReady = NULL; callbacks->compare = NULL; callbacks->dataBecameReadyNotification = NULL; CMItemCount capacity = 4; OSStatus s = CMBufferQueueCreate(allocator, capacity, callbacks, queue); NSLog(@"QUEUE: %x", queue); NSLog(@"STATUS: %i", s); with timeCallback: CMTime timeCallback(CMBufferRef buf, void *refcon){ return CMTimeMake(1, 1); } and queue is: CMBufferQueueRef* queue; queue creations fails (queue = 0) and returns a status of: kCMBufferQueueError_RequiredParameterMissing = -12761, The callbacks variable is correctly initialized, at least the debugger says so. Somebody have played arround with CMBufferQueue? google doesn't know about that! Thanks

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  • Loading Accessory callout view for mkannotationview

    - by Zap
    I have a map annotation view that contains a rightcallout button which loads an accessory view which is a UIViewController class. I am using resuable annotations, but am wondering how I can pass updated information to my UIViewController class. Let's say I have 2 string values which map to 2 UILabels on my view. How can I update those values after the initial accessory view has already been loaded into memory as a resusable view? Any help would be appreciated.

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  • Using objective-c objects with an NSDictionary

    - by Mark
    I want store a URL against a UILabel so that when a user touches the label it takes them to that URL in a UIWebView. I have declared a NSDictionary like so: NSMutableArray *linksArray = [[NSMutableArray alloc] init]; [linksArray addObject: [NSValue valueWithNonretainedObject: newsItem1ReadMoreLabel]]; [linksArray addObject: [NSValue valueWithNonretainedObject: newsItem2ReadMoreLabel]]; [linksArray addObject: [NSValue valueWithNonretainedObject: newsItem3ReadMoreLabel]]; [linksArray addObject: [NSValue valueWithNonretainedObject: newsItem4ReadMoreLabel]]; [linksArray addObject: [NSValue valueWithNonretainedObject: newsItem5ReadMoreLabel]]; //NSString *ageLink = @"http://www.theage.com.au"; NSArray *defaultLinks = [NSArray arrayWithObjects: @"1", @"2", @"3", @"4", @"5", nil]; self.urlToLinkDictionary = [[NSMutableDictionary alloc] init]; self.urlToLinkDictionary = [NSDictionary dictionaryWithObjects:defaultLinks forKeys:linksArray]; Considering I used a NSValue as the key, how do I get/set the URL associated with that key given that I only have references to the UILabels? this is what I have but it doesn't work: for(NSValue *key in [self.urlToLinkDictionary allKeys]) { if ([key nonretainedObjectValue] == linkedLabel) { [self.urlToLinkDictionary setValue:[newsItem link] forKey: key]; } } but I get an error: "objc_exception_throw" resolved

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  • Why is UIControlTouchUpInside UNDEFINED?

    - by munchine
    I've got a simple question but it has got me confounded. The code below gets an UNDEFINED error for UIControlTouchUpInside. What do I need to include or import? If I comment out the line, it works. So that means forState:UIControlStateNormal is defined. I'm new so hope you can help. UIButton * button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button setTitle:@"Accept?" forState:UIControlStateNormal]; [button addTarget:self action:@selector(acceptTapped) forControlEvents:UIControlTouchUpInside];

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