problem about nscoding-Collection of common programming errors

• 
  n.evermind
  ios nsdata nskeyedarchiver nscoding nsfilewrapper
  I usually encode my data in a NSFileWrapper like this (I leave out the NSFileWrapper bit):-(NSData*)encodeObject:(id<NSCoding>)o {@autoreleasepool { NSMutableData *data = [NSMutableData data];NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];[archiver encodeObject:o forKey:@”data”];[archiver finishEncoding];return data;}}And I usually get my data back when doing this:- (id)decodeObjectFromWrapperWithPreferredFilename:(NSString *)p {NSFileWr
• 
  Craig Otis
  objective-c cocoa nsstring nscoding
  I have a custom class that extends NSString. I’m attempting to serialize it (for drag/drop) using an NSKeyedArchiver. The class overrides the …Coder methods:- (id)initWithCoder:(NSCoder *)aDecoder {if ((self = [super initWithCoder:aDecoder])) {data = [[aDecoder decodeObjectForKey:@”data”] copy];}return self; }- (void)encodeWithCoder:(NSCoder *)aCoder {[super encodeWithCoder:aCoder];[aCoder encodeObject:self.data forKey:@”data”]; }But when I try to actually run through the archiving/unarchiving
• 
  Matrosov Alexander
  ios user-interface nscoding
  I have an UIScrollView object that contain other views. There are UIViewController(s) that user can create in runtime and puts they views on UIScrollView. In its turn they store also different view.So I suppose that I can use NSCoding for storing user interface in NSUserDefaults. But maybe another way will be most beautiful, for example if I will have data model of these views and if I need they I will recreate it using data model instead NSCoding that will store all my object in storage.
• 
  Tammo Freese
  ios objective-c osx nscoding nsarchiving
  For a data recovery program I need to be able to extract the values+types from files written by NSArchiver, without having access to Apple’s CF / NS frameworks.The OS X file command reports such files as:NeXT/Apple typedstream data, little endian, version 4, system 1000Is there any documentation on how these files are encoded, or has anyone come up with code that can parse them?Here’s an example of such data (also: downloadable):04 0B 73 74 72 65 61 6D 74 79 70 65 64 81 E8 03 ..streamtyped… 8
• 
  eitan27
  ios debugging nskeyedarchiver nscoding ad-hoc-distribution
  My application is involves users saving data which I store using NSCoding/NSKeyedArchiver. I supply the user with sample data objects on the first run of the app.The expected behavior happens during regular testing, as well as through ad hoc deployment. Unfortunately, a significant bug happens when the app is downloaded through the app store. What other environmental considerations might there be so I can reproduce (and then fix) the issue in my regular testing?Expected behavior:A new user may
• 
  AndrewPo
  ios struct nscoding github-mantle
  I want to use Mantle framework (https://github.com/github/Mantle) to support NSCoding for my class with struct property:typedef struct {int x;int y; } MPoint;typedef struct {MPoint min;MPoint max; } MRect;@interface MObject : MTLModel@property (assign, nonatomic) MRect rect;@end@implementation MObject @endBut when I tried to [NSKeyedArchiver archiveRootObject:obj toFile:@”file”]; its crashed in MTLModel+NSCoding.m, in – (void)encodeWithCoder:(NSCoder *)coder on linecase MTLModelEncodingBehaviorU
• 
  Pirate
  objective-c serialization deserialization archive nscoding
  I have a web service which written in DotNet and returns a archived class object which i need to unarchive in Objective C. I am not good in Objective C so i dont know how to do it. Or whether it is possible or not.I try to use this link How to encode/decode a long long property with NSCoder? but i dont know the key to decode it and if i try to decode it without then it is crashing.Please help me as i am stuck in this.Thanks.
• 
  An Error occurred… again
  iphone uiimage nsdata nscoding
  I am trying to save a UIImage fro an ABRecordRef in my own NSCoding conform Class. As far as i am now i can tell, that UIImage is not NSCoding conform so i tried the following work-around by using NSData instead:- (id)initWithRecordRef:(ABRecordRef)record{//Getting the imageif (ABPersonHasImageData(record)){CFDataRef imageData = ABPersonCopyImageData(record);image = [UIImage imageWithData:(NSData *) imageData];CFRelease(imageData);}return self; }- (void)encodeWithCoder:(NSCoder *)aCoder{//encode
• 
  evanskis
  iphone archive nib nscoding
  Ok, I’m having a lot of problems right now trying to get initWithCoder: to work right. I have a nib file that gets loaded, and in my app delegate, I call unarchiveWithFile: for the view controller that is associated with that nib, and now my app crashes. I can see that initWithCoder: is being called twice, presumably once from when awakeFromNib: is called, and then from when I call unarchiveWithFile: since the view controller conforms to NSCoding. But now either it crashes as soon as the view lo
• 
  Matthias Bauch
  iphone ios uiimagepickercontroller nsuserdefaults nscoding
  When the user starts the app for the first time he gets a pop up and has to save an image. It works on the simulator and on the 4S. But when I start it with my 3G it gives me a SIGABRT error as soon as I chose a picture. I assume its because of the size of the picture which is too pick and therefore claiming all of the ram – But that is rather weird, because I make it much smaller. Here is the code: – (void)viewDidLoad { [super viewDidLoad];if ([[NSUserDefaults standardUserDefaults] objectForKey
• 
  Nathan Sakoetoe
  objective-c ipad ios5 nscoding nscoder
  I have some details stored inside an NSDictionary. I’m using a Master-Detail view on iPad and after I added the initWithCoder method, my app crashes on start-up and I don’t know how to make it work.The reason I want to use NSCoder is to store my user’s data and be able to show it once he starts the app again. NSUserDefaults isn’t feasible because I’m storing UITextFields and UISegmentedControls inside the dictionary for ease of handling data.- (id)initWithCoder:(NSCoder *)aDecoder {if (self = [s
• 
  flexaddicted
  objective-c core-data nscoding
  I got the following error [context save:&error]. How should I fix?unrecognized selector sent to class* -[NSKeyedArchiver dealloc]: warning: NSKeyedArchiver deallocated without having had -finishEncoding called on it.* Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘+[TempObject encodeWithCoder:]:unrecognized selector sent to class’Here the code I’m using.NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext]; PostRequest *postR
• 
  vesselhead
  ios ios4 bluetooth nscoding
  I have an object that I want to send to another device via bluetooth. I have successfully setup the bluetooth connection and transferred an encoded NSString; however, I haven’t figured out how to use the archiving and encoding tools correctly to send an Object.I want to send the object defined below called ChatMessage. It implements the NSCoding delegate methods initWithCoder and encodeWithCoder as seen below.In the second code snippet, I have the code for sending and receiving the data i.e. the
• 
  MCKapur
  iphone objective-c crash nscoding
  I have been searching top and bottom for info on how to do this. I landed on a great tutorial! So I am still quite newbie to this. Basically I have been trying to store Map View annotations to an array. The annotations are a separate class which basically overrides / acts as a MKAnnotation for a pin annotation. It has three properties:Annotation CoordinateAnnotation TitleAnnotation SubtitleThis array needs to store into the NSUserDefaults. I faced a problem, here is the log:[UIMutableIndexPath s
• 
  CjCoax
  objective-c cocoa nscoding
  I’m new to objective-c and cocoa, and trying to create a document based application that saves and loads a custom class to and from the filesystem. My custom class that conforms to nscoding protocol is as follow:NSString *const description = @”description”;@implementation PhotoItem @synthesize description = _description;-(id)init {if(self = [super init]){self.description = @””;}return self; }/* serializing into file */ – (void)encodeWithCoder:(NSCoder *)aCoder {[aCoder encodeObject:self.descrip
• 
  Zack
  ios cocoa nscoding heightforrowatindexpath
  Some information about the way I am saving my data: I have an array of View Controllers that are added and deleted by the user (this is basically a note taking app and the View Controllers are folders). The View Controllers have several dynamic properties that the app needs to save as well as the notes array within them, and then the Note objects themselves have a few properties that need to be saved. The View Controllers and the Notes both of course have the proper NSCoding stuff, this is the o
• 
  Anand Gautam
  iphone ios nsuserdefaults nscoding customclasses
  I have an entity class which inherits NSObject that holds some data, and class name is “MessageDetails”. i.eMessageDetails.h Class-#import <Foundation/Foundation.h>@interface MessageDetails : NSObject@property (nonatomic, retain) NSString *userImage; @property (nonatomic, retain) NSString *userName; @property (nonatomic, retain) NSString *message; @property (nonatomic, retain) NSString *dateString;@endMessageDetails.m Class-#import “MessageDetails.h”@implementation MessageDetails @synthesi
• 
  Bryan Irace
  ios nsarray nsdictionary nscoding
  I am seeing a problem that seems to be unique to iOS 5, where trying to encode a dictionary results in a crash because an array is populated with a nil object in the process.This is confusing to me because I would think in order for the following to happen, the dictionary would need to contain nil, which I would expect would crash at the time the dictionary is populated as opposed to when it is encoded.Any idea what could be causing this?Application Specific Information: *** Terminating app due
• 
  0x8badf00d
  objective-c encoding save nsdictionary nscoding
  So I have this custom object i made called ‘Box’, it’s throwing the error for that one. Inside of my NSDictionary is…box = [[Box alloc] initWithHeight:20 height:40]; wrap.dict = [NSMutableDictionary dictionaryWithObjectsAndKeys:numberInt, kInt, numberShort, kShort, numberLong, kLong, numberFloat, kFloat, numberDouble, kDouble, numberBool, kBool, nsString, kString, nsDate, kDate, box, @”keybox”, nil];Notice the box object that I created up top and added in the NSDictionary at the very end.
• 
  Taz
  ios objective-c persistence nskeyedarchiver nscoding
  I’m trying to unarchive an array of objects of a particular type, but the initWithCoder: function does not get executed within the object’s class. Instead, I’m given the error:*** Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘-[SavedObject initWithCoder:]: unrecognized selector sent to instance 0x9e85f34’Now, the strange thing is, the encodeWithCoder: is called and I’m able to write the data to disk just fine. Then when attempting to read the data back, the dat
• 
  ila
  ios core-data nscoding object-graph
  I am trying to save an NSMutableArray in CoreData. The Array contains objects NSDictionary NSDictionary has following Structure valueDict = {FloorId = F0001;endCoordinates = “NSPoint: {541, 413}”;linePath = “<UIBezierPath: 0x1d0903c0>”;pointsOnLine = ();startCoordinates = “NSPoint: {418, 504}”; },To write to the Core Data I use following code: parray is type BinaryDatapoints.parray = [NSKeyedArchiver archivedDataWithRootObject:self.locationsArray];and to retrieve value I uselocationsA
• 
  Mark Probst
  ios ios5 nscoding
  I’ve archived an NSDictionary on iOS 4 using an NSKeyedArchiver, but unarchiving on iOS 5 using[NSKeyedUnarchiver unarchiveObjectWithData: data]throws this exception*** Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘*** -[NSKeyedUnarchiver initForReadingWithData:]: incomprehensible archive (0x62, 0x70, 0x6c, 0x69, 0x73, 0x74, 0x30, 0x30)’Note that unarchiving on iOS 4 works fine. plutil -lint reports that the archive is okay. Here it is, for reference:http://w
• 
  Stuartsoft
  objective-c nsarray nscoding
  I’m attempting to save an object that has an NSMutableArray of nested objects. I want to use the NSCoding Protocol to save the file under the documents directory. Do I need to encode every object (including the nested ones) or just the super class itself? Right now I’m only encoding the super class’ objects. To better illustrate what my object hierarchy looks like:Main Object-NSString-int-NSMutableArray-int-double-char

Web site is in building