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  • MPMediaItem - NSCoding problem with MPMediaItemArtwork

    - by z s
    Hi, So MPMediaItem conforms to NSCoding, but it contains a pointer to MPMediaItemArtwork, which doesn't conform to NSCoding. So if I try to archive a MPMediaItem, if that item has some artwork in it, it will not be able to unarchive. I tried to make a category of MPMediaItemArtwork and make it conform to NSCoding, but I can't seem to do that because we don't have access to the actual UIImage that it stores. Does anyone know of any other creative ways to get around this problem? I want to be able to archive an MPMediaItem, even if it means somehow stripping off the artwork object. Is there a way to make a category of a class to strip away certain functionality (instead of just adding more, like we do with categories)? Or any other clever way to achieve this? Thanks.

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  • How can UISearchDisplayController autorelease cause crash in a different view controller?

    - by Tofrizer
    Hi, I have two view controllers A and B. From A, I navigate to view controller B as follows: // in View Controller A // navigateToB method -(void) navigateToB { BViewController *bViewController = [[BViewController alloc] initWithNibName: @"BView" bundle:nil]; bViewController.bProperty1 = SOME_STRING_CONSTANT; bViewController.title = @"A TITLE OF A VC's CHOOSING"; [self.navigationController pushViewController: bViewController animated:YES]; [bViewController release]; //<----- releasing 0x406c1e0 } In BViewController, the property bPropery1 is defined with copy as below (note, B also contains UITableView and other properties): @property (nonatomic, copy) NSString *bProperty1; Everything appeared to work fine when navigating back and forth between A and B. That is until I added a UISearchDisplayController to the table view contained in BViewController. Now when I navigate out of B, back to A, the app crashes. Stack trace shows what looks the search display controller being autoreleased at time of crash: #0 0x009663a7 in ___forwarding___ #1 0x009426c2 in __forwarding_prep_0___ #2 0x018c8539 in -[UISearchDisplayController _destroyManagedTableView] #3 0x018c8ea4 in -[UISearchDisplayController dealloc] #4 0x00285ce5 in NSPopAutoreleasePool NSZombies shows: -[BViewController respondsToSelector:]: message sent to deallocated instance 0x406c1e0 And malloc history on this points to the bViewController already released in A's navigateToB method above: Call [2] [arg=132]: thread_a065e720 |start ... <snip> ..._sendActionsForEvents:withEvent:] | -[UIControl sendAction:to:forEvent:] | - [UIApplication sendAction:to:from:forEvent:] | -[**AViewController navigateToB**] | +[NSObject alloc] | +[NSObject allocWithZone:] | _internal_class_createInstance | _internal_class_createInstanceFromZone | calloc | malloc_zone_calloc Can someone please give me any ideas on what is happening here? In navigateToB method, once the bViewController is released (after pushViewController), that's should be it for bViewController. Nothing else even knows about it as it is local to the navigateToB method block and it has been released. When navigating from B back to A, nothing is invoked in viewDidLoad, viewWillAppear etc that will re-enter navigateToB. It looks like somehow search display controller has a reference to something in my AViewController and so as it is autoreleased it is taking this "something" down with it but I cannot understand how this is possible, especially as I'm using copy to pass data between A and B. I'm going potty over this. I'm sure this is my mistake somewhere and so I turn to you, Stack Overflow legends for any words of wisdom or advice on how to resolve this. Many Thanks.

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  • XCTest.framework build error

    - by user2703123
    I am using the DropBox Core API in my app and therefore, I must include the XCTest framework, because, when I haven't added the XCTest framework, my app can't connect to dropbox, however when I do add the framework, I get an error while building for the simulator. There is nothing wrong with my code! Here is the error: Ld /Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop!-fchnxyvnqyeefscfhmohrzxtiqeb/Build/Products/Debug-iphonesimulator/SnapDrop!.app/SnapDrop! normal i386 cd "/Users/Zach/Desktop/SnapDrop!" setenv IPHONEOS_DEPLOYMENT_TARGET 6.1 setenv PATH "/Applications/Xcode5-DP6.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode5-DP6.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" /Applications/Xcode5-DP6.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch i386 -isysroot /Applications/Xcode5-DP6.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk -L/Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop!-fchnxyvnqyeefscfhmohrzxtiqeb/Build/Products/Debug-iphonesimulator -F/Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop!-fchnxyvnqyeefscfhmohrzxtiqeb/Build/Products/Debug-iphonesimulator -F/Users/Zach/Downloads/dropbox-ios-sdk-1.3.5 -F/Users/Zach/Downloads/dropbox-ios-sync-sdk-1-1.1.0 -F/Applications/Xcode5-DP6.app/Contents/Developer/Library/Frameworks -F/Users/Zach/Desktop -filelist /Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop!-fchnxyvnqyeefscfhmohrzxtiqeb/Build/Intermediates/SnapDrop!.build/Debug-iphonesimulator/SnapDrop!.build/Objects-normal/i386/SnapDrop!.LinkFileList -Xlinker -objc_abi_version -Xlinker 2 -fobjc-arc -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=6.1 -framework iAd -framework AssetsLibrary -framework QuartzCore -framework SystemConfiguration -framework Security -framework CFNetwork -framework XCTest -framework Dropbox -framework DropboxSDK -framework CoreGraphics -framework UIKit -framework Foundation -Xlinker -dependency_info -Xlinker /Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop!-fchnxyvnqyeefscfhmohrzxtiqeb/Build/Intermediates/SnapDrop!.build/Debug-iphonesimulator/SnapDrop!.build/Objects-normal/i386/SnapDrop!_dependency_info.dat -o /Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop!-fchnxyvnqyeefscfhmohrzxtiqeb/Build/Products/Debug-iphonesimulator/SnapDrop!.app/SnapDrop! ld: building for iOS Simulator, but linking against dylib built for MacOSX file '/Applications/Xcode5-DP6.app/Contents/Developer/Library/Frameworks/XCTest.framework/XCTest' for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation) What should I do? If my framework is corrupt, can you tell me how to reinstall it? I have tried deleting and reinstalling Xcode with no luck.

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  • Programmatical Creation of NSMappingModel

    - by enchilada
    I want to programmatically (without Lightweight Migration) create a mapping model between two models that are exactly the same, except one of the entities (there are a bunch of entities) has different attributes. Let's call this entity "Person". And let's say the destination model has 1) added a new attribute called "address" 2) deleted an attribute called "eyeColor" 3) kept (i.e. not done anything with) an attribute called "name" How would you create an NSMappingModel between these models programmatically? I happen to have some explicit questions that might help me do this by myself: Q1) Do I have to create NSEntityMapping objects for all of the entities other than "Person", even if they remain unchanged? Q2) How do I deal with the "address" attribute in "Person", which is a new one being created? Should I create an NSPropertyMapping for that somehow, that turns nothing into something ("address")? Q3) How do I deal with the "name" attribute in "Person"? Do I have to create an NSPropertyMapping for that, even though it simply stays the same? Q4) For the NSEntityMapping corresponding to "Person", is not creating any NSPropertyMapping for "eyeColor" a proper way to get it deleted? Or should I create an NSPropertyMapping for "eyeColor"? If yes, how would this object be created, i.e. what would determine that its purpose is to get rid of "eyeColor"? Thank you in advance, and I apologize not being able to answer these questions myself, as the documenation really has no good example of how to create NSMappingModels programmatically. Note again that I'm not allowed to use Lightweight Migration. I must do this manually.

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  • Obj-C : Passing parameters back from a detailViewController in a navigation controller

    - by Garfield81
    Hi I am using a navigation Controller on an iPhone app. I am able to pass data forward when I push a controller into the navigation stack but how do I pass data back when I pop the controller. What I am basically trying to achieve is the root navigation controller view displays a number of fields that can be edited. A user then clicks on one of the fields to be edited and a EditViewController is pushed onto the stack with the name of the field the user wants to edit. Now the users enters the new value of the field and presses save to pop the view controller. So how do I get the value from the editViewController back to the root navigation controller view?

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  • Removing all CALayer's sublayers

    - by radex
    Hi. I have trouble with deleting all layer's sublayers. I do this manually, but it's unwanted code clutter. I found many topics about this in google, but no answer. I tried to do something like this: for(CALayer *layer in rootLayer.sublayers) { [layer removeFromSublayer]; } but it didn't work. Also, i tried to clone rootLayer.sublayers into separate NSArray, but result was the same. Any ideas? regards, radex PS. sorry for my English. Edit: I thought it works now, but I was wrong. It works good with CALayers, but it doesn't work with CATextLayers. Any ideas?

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  • Problem with Core Data - EXC_BAD_ACCESS

    - by BarrettJ
    I'm using the following code and I'm getting an EXC_BAD_ACCESS when trying to get the count of objects - anyone have any idea why? Oddly enough, the error only happens if the count should be one or greater, if there are no objects it seems to work fine (it outputs null). NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"TVShow" inManagedObjectContext:[self managedObjectContext]]; [fetchRequest setEntity:entity]; [fetchRequest includesPendingChanges]; //NSPredicate *predicate = [NSPredicate predicateWithFormat:@"ID == %@", showId]; //[fetchRequest setPredicate:predicate]; NSError *error; NSLog(@"Generating Count"); NSUInteger count = [[self managedObjectContext] countForFetchRequest:fetchRequest error:&error]; if(count == NSNotFound) { NSLog(@"error"); } else { NSLog(@"%@", count); // EXC_BAD_ACCESS here } [fetchRequest release];

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  • ScriptingBridge causes iTunes to relaunch after quit

    - by Justin Voss
    I'm working on a Cocoa app that monitors what you're listening to in iTunes, and since I'm targeting Mac OS 10.5 and higher, I've decided to use Scripting Bridge. If I try to close iTunes too close to the time that my app polls it for the current track, iTunes will immediately relaunch! The only way to reliably prevent this behavior is to quit my app first, then quit iTunes. Switching to EyeTunes solves the problem, but it's a fairly old codebase and I was hoping that I could accomplish this without an external library. Surely I'm doing something wrong that's causing the relaunch? Here's some sample code; this snippet is run every few seconds, triggered by an NSTimer. #import "iTunesBridge.h" // auto-generated according to Apple's docs -(void)updateTrackInfo { iTunesApplication *iTunes = [[SBApplication alloc] initWithBundleIdentifier:@"com.apple.iTunes"]; iTunesTrack *currentTrack = [iTunes currentTrack]; // inspect currentTrack to determine what's being played... [iTunes release]; } Is this a known issue with Scripting Bridge, or am I using it incorrectly?

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  • AVAudioPlayer working in Simulator, but not on device

    - by cannyboy
    My mp3 playing code is: NSError *error; soundObject = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:audioPathString] error:&error]; if (soundObject == nil) NSLog(@"%@", [error description]); soundObject.delegate = self; soundObject.numberOfLoops = 0; soundObject.volume = 1.0; NSLog(@"about to play"); [soundObject prepareToPlay]; [soundObject play]; NSLog(@"[soundObject play];"); The mp3 used to play fine, and it still does on the simulator. But not on the device. I've recently added some sound recording code (not mine) to the software. It uses AudioQueue stuff which is slightly beyond me. Does that conflict with AVAudioPlayer? Or what could be the problem? I've noticed that as soon as the audiorecording code starts working, I can't adjust the volume on the device anymore, so maybe it blocks the audio playback?. EDIT The solution seems to be to put this in my code. I put it in applicationDidFinishLaunching: [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayAndRecord error: nil]; UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker; AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,sizeof (audioRouteOverride),&audioRouteOverride); The first line allows both play and record, whilst the other lines apparently reroute things to make the volume louder. All audio code is voodoo to me.

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  • Adding a dynamic image to UITable View Cell

    - by Graeme
    Hi, I have a table in which I want a dynamic image to load in at the left-hand side. The table needs to use an IF statement to select the appropriate image from the "Resources" folder, and needs to be based upon [dog types]. The [dog types] is extracted from an RSS feed, and so the image in the table cell needs to match the each cell's [dog types] tag. Update: See code below for what I'm looking to do (only below it's for earthquakes, for me its pictures of dogs). I suspect I need to use - (UIImage *)imageForTypes:(NSString *)types { to do such a thing. Thanks. Updated code: This is for Apple's Earthquake sample but does exactly what I need to do. It matches images to the severity (2.0, 3.0, 4.0, 5.0 etc.) of every earthquake to the magnitude. - (UIImage *)imageForMagnitude:(CGFloat)magnitude { if (magnitude >= 5.0) { return [UIImage imageNamed:@"5.0.png"]; } if (magnitude >= 4.0) { return [UIImage imageNamed:@"4.0.png"]; } if (magnitude >= 3.0) { return [UIImage imageNamed:@"3.0.png"]; } if (magnitude >= 2.0) { return [UIImage imageNamed:@"2.0.png"]; } return nil; } and under - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath magnitudeImage.image = [self imageForMagnitude:earthquake.magnitude];

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  • how to udate window controls(NSTextField,NSCheckbox and etc) in binding manually

    - by Amit
    Hi, I am working on an application in which i need to store all the NSObject subclass properties into plist file and then allow users to store it and restore it. We call it profile and it can restore the saved state of all the controls/views on the window in my application. I have completed the storing/Restoring part, but the issue is when i am updating the class properties manually, it is not updating the control state Like checkboxs and others which is bind with the class property. Please let me know how can i update the controls state, if its KVC/KVO updated programatically. Thanks in advance

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  • a valid signing identity matching this profile could not be found in your keychain

    - by riteshkumar1905
    Hi i am a admin in apple developer and my profile my profile is deleted. now when we create new provisioning profile it give error "valid signing identity matching this profile could not be found in your keychain ". certificate request in keychain is resisted with my profile. I am also developed new certificate request with new apple devlopper profile but this also give same problem. how its solved plz tell me.

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  • how a view controller know when it is dismissed or poped out of the navigation controller stack?

    - by Thanh-Cong Vo
    Hi all, My view controller needs to know when it is poped out of the navigation controller stack, so that it can retain itself, wait and release itself later with another notification. I intend to do like that when the view is sent dealloc message: - (void)dealloc { if (self.isPerformingSomeTask) { self.isPopedOut = YES; [self retain]; return; } [super dealloc]; } But I think this is not a good solution? Any idea?

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  • Help - Three20 Distribution Build

    - by Lukas
    Hey there, I just wanted to build my App for submitting it to the AppStore - it includes the widely used three20 framework. As the Debug Versions on the Dev-Devices worked great, i'm having trouble compiling the project for distribution. XCode says: No architectures to compile for (ONLY_ACTIVE_ARCH=YES, active arch=armv6, VALID_ARCHS=i386). Any idea what's happening there? I've tried to google it, but i haven't found a solution yet. Thanks!

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  • UITextField keyboard difference between simulator and real device

    - by Raphael Pinto
    Hi, I am trying get float value with UITextField. On the simulator V3.1.3 in English, I have to use '.' to separate my float values. But on my Iphone 3GS V3.1.3 in French, I have to use ',' to separate them. If I use '.' on my Iphone 3GS, my float is troncated : 3.22222 = 3.0000000 Is there a solution to detect the language version and use the good separator automaticaly?

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  • Alternative Control Structures

    - by Brock Woolf
    I've been wondering about alternative ways to write control structures. One that you learn early on for if statements is a replacement for this: if ( x ) { // true } else { // false } with this (sometimes this is more readable compared to lots of brackets): x ? true : false It got me thinking. Can we replace anything else incase it's more readable. We of course replace if statements like this: if (a < b) { return true; } else { return false; } with things like this: return a < b; We can save a long if with something like this (pretty much same as the one above): bool xCollisionTrue = (object.xPos < aabb.maxX && object.xPos > aabb.minX); So those are the ones I can think of off the top of my head for the if statement and doing comparisons. So I'm wondering what about looping constructs, for, while, etc. Maybe the code obfuscators might have some ideas.

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  • iphone EXC_BAD_ACCESS

    - by Dave
    I seem to get an EXC_BAD_ACCESS error when I select a cell in my table view that takes me to a 2nd table view with a lot of these http://pastie.org/906711 could they be the problem if I have 8 of them ? Heres the backtrace : http://pastie.org/906729 Thanks for your time,

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  • Using CGContext to display a sprite sheet iPhone

    - by Mike
    Hello, So I have a spritesheet in png format, and have already worked out the coordinates for what I want to display. I'm trying to create a method that will return a UIImage when passed the location information on the spritesheet. I'm just not sure how to use the CGContext stuff along with the the coordinates to return an UIImage. I was looking to CGContextClipToRect because I think that is the way to do it, but I just can't seem to get it to work. Something like this CGSize size = CGSizeMake(xSize, ySize); UIGraphicsBeginImageContext(size); //CGContextClipToRect(spriteSheet.size, imageRect); [spriteSheet drawAtPoint:CGPointMake(xPos, yPos)]; UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return scaledImage; returns only what is in the size Context. I need to be able to "move" this size window around the spritesheet if that makes sense. Any help would be appreciated. Thanks, Mike

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  • Can't find applicationSupportDirectory?

    - by Frost Li
    There is always a pre-written function at AppDelegate: (NSString *)applicationSupportDirectory { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES); NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : NSTemporaryDirectory(); return [basePath stringByAppendingPathComponent:@"SyncFile"]; } However, I can't call this method outside this class: id _appDelegate = (SyncFile_AppDelegate *)[[NSApplication sharedApplication] delegate]; NSLog(@"%@", [_appDelegate applicationSupportDirectory]); The compiler warned me that it can't find method applicationSupportDirectory... Does anyone know what's wrong with my code? Thank you very much!

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  • How to use CFNetwork to get byte array from sockets?

    - by Vic
    Hi, I'm working in a project for the iPad, it is a small program and I need it to communicate with another software that runs on windows and act like a server; so the application that I'm creating for the iPad will be the client. I'm using CFNetwork to do sockets communication, this is the way I'm establishing the connection: char ip[] = "192.168.0.244"; NSString *ipAddress = [[NSString alloc] initWithCString:ip]; /* Build our socket context; this ties an instance of self to the socket */ CFSocketContext CTX = { 0, self, NULL, NULL, NULL }; /* Create the server socket as a TCP IPv4 socket and set a callback */ /* for calls to the socket's lower-level connect() function */ TCPClient = CFSocketCreate(NULL, PF_INET, SOCK_STREAM, IPPROTO_TCP, kCFSocketDataCallBack, (CFSocketCallBack)ConnectCallBack, &CTX); if (TCPClient == NULL) return; /* Set the port and address we want to listen on */ struct sockaddr_in addr; memset(&addr, 0, sizeof(addr)); addr.sin_len = sizeof(addr); addr.sin_family = AF_INET; addr.sin_port = htons(PORT); addr.sin_addr.s_addr = inet_addr([ipAddress UTF8String]); CFDataRef connectAddr = CFDataCreate(NULL, (unsigned char *)&addr, sizeof(addr)); CFSocketConnectToAddress(TCPClient, connectAddr, -1); CFRunLoopSourceRef sourceRef = CFSocketCreateRunLoopSource(kCFAllocatorDefault, TCPClient, 0); CFRunLoopAddSource(CFRunLoopGetCurrent(), sourceRef, kCFRunLoopCommonModes); CFRelease(sourceRef); CFRunLoopRun(); And this is the way I sent the data, which basically is a byte array /* The native socket, used for various operations */ // TCPClient is a CFSocketRef member variable CFSocketNativeHandle sock = CFSocketGetNative(TCPClient); Byte byteData[3]; byteData[0] = 0; byteData[1] = 4; byteData[2] = 0; send(sock, byteData, strlen(byteData)+1, 0); Finally, as you may have noticed, when I create the server socket, I registered a callback for the kCFSocketDataCallBack type, this is the code. void ConnectCallBack(CFSocketRef socket, CFSocketCallBackType type, CFDataRef address, const void *data, void *info) { // SocketsViewController is the class that contains all the methods SocketsViewController *obj = (SocketsViewController*)info; UInt8 *unsignedData = (UInt8 *) CFDataGetBytePtr(data); char *value = (char*)unsignedData; NSString *text = [[NSString alloc]initWithCString:value length:strlen(value)]; [obj writeToTextView:text]; [text release]; } Actually, this callback is being invoked in my code, the problem is that I don't know how can I get the data that the windows client sent me, I'm expecting to receive an array of bytes, but I don't know how can I get those bytes from the data param. If anyone can help me to find a way to do this, or maybe me point me to another way to get the data from the server in my client application I would really appreciate it. Thanks.

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  • Trying to parse twitter trends

    - by timothy5216
    Im trying to parse twitter trends but i keep getting a parser error at "as_of". anyone know why this is happening? EDIT: Here is the code im using NSMutableArray *tweets; tweets = [[NSMutableArray alloc] init]; NSURL *url = [NSURL URLWithString:@"http://search.twitter.com/trends/current.json"]; trendsArray = [[NSMutableArray alloc] initWithArray:[CCJSONParser objectFromJSON:[NSString stringWithContentsOfURL:url encoding:4 error:nil]]]; NSMutableDictionary *dict = [[NSMutableDictionary alloc] init]; for (int i = 0; i < [trendsArray count]; i++) { dict = [[NSMutableDictionary alloc] init]; //[post setObject: [[currentArray objectAtIndex:i] objectForKey:@"query"]]; [dict setObject:[trendsArray objectAtIndex:i] forKey:@"trends"]; //[dict setObject:[trendsArray objectAtIndex:i] forKey:@"query"]; //[post setObject:[trendsArray objectAtIndex:i] forKey:@"as_of"]; [tweets addObject:dict]; //post = nil; }

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  • Cocos2D, UIScrollView, and initial placement of a scene

    - by diatrevolo
    Hello: I am using a UIScrollView to forward touches to Cocos2D as outlined in http://getsetgames.com/2009/08/21/cocos2d-and-uiscrollview/ Everything works great after a few days of working with it, except one thing: when the initial view appears on the screen, the background appears to be scrolled to the center. As soon as I try to scroll around, the image jumps to 0,0, and everything works as normal, except the touches are offset by half the width and height of the background image. Am I overlooking something basic? I can't think of a useful portion of the code that illustrates the issue, as I can't track it down, but would be happy to post code if anyone has any ideas. Thanks in advance, -Roberto

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