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  • Uncenter MkMapView

    - by Makinitez21
    I am trying to "uncenter" the map view and remove all annotations. the reason for this is that the mapView will be used by different view controllers to display different annotations and locations. What's happening now is that i am using the "remove annotations" method and i removes them, but the map stays centered on the spot and thus when the new annotations come in, it does not move. Is there a way to reset the region and if so, what value do i reset it to. I tried nil, zero and some calculated value but "core animation" says they are all invalid. how do i get that to zoom out and back in on my new annotations? here is some code -(void)recenterMap { NSArray *coordinates = [_mapView valueForKeyPath:@"annotations.coordinate"]; CLLocationCoordinate2D maxCoord = {-90.0f, -180.0f}; CLLocationCoordinate2D minCoord = {90.0f, 180.0f}; //NSLog(@"%@", [coordinates description]); for (NSValue *value in coordinates) { CLLocationCoordinate2D coord = {0.0f, 0.0f}; [value getValue: &coord]; if(coord.longitude > maxCoord.longitude) { maxCoord.longitude = coord.longitude; } if(coord.latitude > maxCoord.latitude){ maxCoord.latitude = coord.latitude; } if(coord.longitude < minCoord.longitude){ minCoord.longitude = coord.longitude; } if(coord.latitude < minCoord.latitude){ minCoord.latitude = coord.latitude; } } MKCoordinateRegion region = {{0.0f, 0.0f}, {0.0f, 0.0f}}; region.center.longitude = (minCoord.longitude + maxCoord.longitude) / 2.0; region.center.latitude = (minCoord.latitude + maxCoord.latitude) / 2.0; region.span.longitudeDelta = maxCoord.longitude - minCoord.longitude; region.span.latitudeDelta = maxCoord.latitude - minCoord.latitude; [_mapView setRegion: region animated: YES]; } Thats the recenter methos i'm using - (MKAnnotationView *)mapView: (MKMapView *)mapView viewForAnnotation: (id <MKAnnotation>)annotation{ MKAnnotationView *view = nil; if(annotation != mapView.userLocation){ Annotation *schoolAnn = (Annotation*)annotation; view = [self.mapView dequeueReusableAnnotationViewWithIdentifier:@"schoolLoc"]; if(nil == view){ view = [[[MKPinAnnotationView alloc] initWithAnnotation:schoolAnn reuseIdentifier:@"schoolLoc"]autorelease]; } [(MKPinAnnotationView *)view setAnimatesDrop:YES]; [view setCanShowCallout:YES]; } else { [self recenterMap]; } return view; } This "else" piece waits until the blue marble drops in then recenters the map. The problem i have with that part is that when i go back to the previous View Controller i remove all annotations, so when i come back in the User location (for some reason) does not pop back in. How do i get this to pop back in? thanks in advance guys

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  • PHP and Permissions

    - by Moe
    Hi, I recently moved my website to a new host and now am experiencing some broken code.. I have an uploading script that is now returning this: move_uploaded_file() failed to open stream: Permission denied in *.. I've set the upload directory to 777 which worked fine, but my script is needed to have top level permissions.. (As the script itself sets permission to directories, does lots of copying etc) Is there a way in apache I can set the PHP script to the owner of all the folders on my server? Thanks

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  • SharePoint Licensing

    - by Adam
    Hi - we are thinking of using SharePoint to host a web app for which we will allow internal staff and licensed external customers to access a website built on SharePoint. I am thinking that for each authenticated user (logged in) we would need an OS CAL & a SharePoint CAL & we would need a processor license for SQL Server - Is this correct & what about non-authemticatedc website "browsers"? Any advice much appreciated.

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  • Setting UITableViewCell button image values during scrolling

    - by Rob
    I am having an issue where I am trying to save whether a repeat image will show selected or not (it is created as a UIButton on a UITableViewCell created in IB). The issue is that since the cell gets re-used randomly, the image gets reset or set somewhere else after you start scrolling. I've looked all over and the advice was to setup an NSMutableArray to store the button's selection state and I am doing that in an array called checkRepeatState My question is: where do I put the if-then-else statement in the code to where it will actually change the button image based on if the checkRepeatState is set to 0 or 1 for the given cell that is coming back into view? Right now, the if-then-else statement I am using has absolutely no effect on the button image when it comes into view. I'm very confused at this point. Thank you ahead of time for any insight you can give!!! My code is as follows: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { // set up the cell static NSString *CellIdentifier = @"PlayerCell"; PlayerCell *cell = (PlayerCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (!cell) { [[NSBundle mainBundle] loadNibNamed:@"PlayerNibCells" owner:self options:nil]; cell = tmpCell; self.tmpCell = nil; NSLog(@"Creating a new cell"); } // Display dark and light background in alternate rows -- see tableView:willDisplayCell:forRowAtIndexPath:. cell.useDarkBackground = (indexPath.row % 2 == 0); // Configure the data for the cell. NSDictionary *dataItem = [soundCategories objectAtIndex:indexPath.row]; UILabel *label; label = (UILabel *)[cell viewWithTag:1]; label.text = [dataItem objectForKey:@"AnimalName"]; label = (UILabel *)[cell viewWithTag:2]; label.text = [dataItem objectForKey:@"Description"]; UIImageView *img; img = (UIImageView *)[cell viewWithTag:3]; img.image = [UIImage imageNamed:[dataItem objectForKey:@"Icon"]]; NSInteger row = indexPath.row; NSNumber *checkValue = [checkRepeatState objectAtIndex:row]; NSLog(@"checkValue is %d", [checkValue intValue]); // Reusing cell; make sure it has correct image based on checkRepeatState value UIButton *repeatbutton = (UIButton *)[cell viewWithTag:4]; if ([checkValue intValue] == 1) { NSLog(@"repeatbutton is selected"); [repeatbutton setImage:[UIImage imageNamed:@"repeatselected.png"] forState:UIControlStateSelected]; [repeatbutton setNeedsDisplay]; } else { NSLog(@"repeatbutton is NOT selected"); [repeatbutton setImage:[UIImage imageNamed:@"repeat.png"] forState:UIControlStateNormal]; [repeatbutton setNeedsDisplay]; } cell.accessoryType = UITableViewCellAccessoryNone; return cell; }

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  • How to use NSURLDownload

    - by marshluca
    - (IBAction)startDownloadingURL:(id)sender { // create the request NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.apple.com/index.html"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; // create the connection with the request // and start loading the data NSURLDownload *theDownload=[[NSURLDownload alloc] initWithRequest:theRequest delegate:self]; if (!theDownload) { // inform the user that the download could not be made } } when i run the simulator , i got an error: NSURLDownload undeclared ,first use in this fuction. where can i import the library of NSURLDownload.

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  • How do I convert RGB into HSV in Cocoa Touch?

    - by Evelyn
    I want to set the background color of a label using HSV instead of RGB. How do I implement this into code? Code: //.m file #import "IBAppDelegate.h" @implementation IBAppDelegate @synthesize label; { self.label.backgroundColor = [UIColor colorWithRed:1.0f green:0.8f blue:0.0f alpha:1.0f]; }

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  • Excel VBA Application.OnTime. I think its a bad idea to use this... thoughts either way?

    - by FinancialRadDeveloper
    I have a number of users I support that are asking for things to happen automatically ( well more automagically but that's another point!). One want events to happen every 120 secs ( see my other question ) and also another wants 1 thing to happen say at 5pm each business day. This has to be on the Excel sheet so therefore VBA as addins etc will be a no no, as it needs to be self contained. I have a big dislike of using Application.OnTime I think its dangerous and unreliable, what does everyone else think?

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  • How to get IP address of your application server

    - by Jason
    I need to be able to find the IP address of the server the page is currently executing on. I have some code that calls a third party site and has to pass a specific key that changes depending on which server it is on. Is there a CGI variable or some way in ColdFusion to determine what the IP address is of the host server?

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  • ip based ssl certificate

    - by user121196
    I have two domain names pointing to the same ip, I am currently not using virtual host in my apache configuration. I simply use /var/www/html/ as root of the app. do I need to buy 2 godaddy certificates, one for each domain? It seems that godaddy certificate is tied to a domain, not ip, can someone clarify?

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  • How to hide graph on button click ?

    - by aman-gupta
    Hi, In my application I m using following codes to draw a graph but I want that graph will be displayed on button click :- import @interface frmGraphView : UIView { } @end ///////////////////// // // frmGraphView.m // UV Alarm // // Created by Aman on 4/4/10. // Copyright 2010 MyCompanyName. All rights reserved. // import "frmGraphView.h" @implementation frmGraphView struct TCo_ordinates { float x; float y; }; (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { // Initialization code } return self; } /* // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; } */ /* // Override to allow orientations other than the default portrait orientation. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } */ -(void)drawHGrid { //struct gridForXYaxis *gridForX = (struct gridForX *) calloc(sizeof(struct gridFor)) } (void)drawRect:(CGRect)rect { ifdef _DEBUG NSLog(@"frmGraph_drawRect_start"); endif CGContextRef ctx = UIGraphicsGetCurrentContext(); struct TCo_ordinates *tCoordianates; //creating the object of structure. float fltX1,fltX2,fltY1,fltY2=0; //Dividing the Y-axis ifdef _DEBUG NSLog(@"Start drawing Y-Axis"); endif fltX1 = 25; fltY1 = 2; fltX2 = fltX1; fltY2 = 254; //CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0); CGContextSetLineWidth(ctx, 2.0); CGContextMoveToPoint(ctx, fltX1, fltY1); CGContextAddLineToPoint(ctx, fltX2, fltY2); NSArray *hoursInDays = [[NSArray alloc] initWithObjects:@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"10",@"11",@"12", nil]; NSMutableArray *yAxisCoordinates = [[[NSMutableArray alloc] init] autorelease]; for(int intIndex = 0 ; intIndex < [hoursInDays count] ; fltY2-=20, intIndex++) { ifdef _DEBUG NSLog(@"Start of the partition of y axis"); endif //CGContextSetRGBStrokeColor(ctx, 2, 2, 2, 1); //CGContextSetRGBStrokeColor(ctx, 1.0f/255.0f, 1.0f/255.0f, 1.0f/255.0f, 1.0f); //to draw the black line. CGContextMoveToPoint(ctx, fltX1-3 , fltY2-20); CGContextAddLineToPoint(ctx, fltX1+3, fltY2-20); CGContextSelectFont(ctx, "Helvetica", 12.0, kCGEncodingMacRoman); CGContextSetTextDrawingMode(ctx, kCGTextFill); //CGContextSetRGBFillColor(ctx, 0, 255, 255, 1); CGContextSetStrokeColorWithColor(ctx, [UIColor blueColor].CGColor); CGAffineTransform xform = CGAffineTransformMake( 1.0, 0.0, 0.0, -1.0, 0.0, 0.0); CGContextSetTextMatrix(ctx, xform); const char *arrayDataForYAxis = [[hoursInDays objectAtIndex:intIndex] UTF8String]; CGContextShowTextAtPoint(ctx,fltX1-20 , fltY2-15, arrayDataForYAxis, strlen(arrayDataForYAxis)); CGContextStrokePath(ctx); ifdef _DEBUG NSLog(@"End of the partition of graph"); endif //NSValue *yAxis = [NSValue valueWithCGPoint:CGPointMake((tCoordianates-x = fltX1-21), (tCoordianates-y = fltY2-20))]; // [yAxisCoordinates addObject:yAxis]; ifdef _DEBUG // NSLog(@"The value of yAxisCoordintes: %@", yAxisCoordinates); endif } ifdef _DEBUG NSLog(@"End of drawing Y-Axis"); endif //Dividing the X-axis ifdef _DEBUG NSLog(@"Start drawing X-Axis"); endif fltX1 = 25; fltY1 = 255; fltX2 = 320; fltY2 = fltY1; CGContextMoveToPoint(ctx, fltX1, fltY1); CGContextAddLineToPoint(ctx, fltX2, fltY2); //CGContextSetRGBStrokeColor(ctx, 2, 2, 2, 1); CGContextSetLineWidth(ctx, 2.0); NSArray *weekDays =[[NSArray alloc] initWithObjects:@"Sun", @"Mon", @"Tue", @"Wed", @"Thu", @"Fri", @"Sat", nil]; NSMutableArray *xAxisCoordinates = [[[NSMutableArray alloc] init] autorelease]; for(int intIndex = 0 ; intIndex < [weekDays count] ; fltX1+=40, intIndex++) { //CGContextSetRGBStrokeColor(ctx, 2, 2, 2, 1); //CGContextSetStrokeColorWithColor(ctx, [UIColor orangeColor].CGColor); CGContextMoveToPoint(ctx, fltX1+40 , fltY2-3); CGContextAddLineToPoint(ctx, fltX1+40, fltY2+3); CGContextSelectFont(ctx, "Italic", 12.0, kCGEncodingMacRoman); CGContextSetTextDrawingMode(ctx, kCGTextFill); CGContextSetStrokeColorWithColor(ctx, [UIColor blueColor].CGColor); CGAffineTransform xform = CGAffineTransformMake( 1.0, 0.0, 0.0, -1.0, 0.0, 0.0); CGContextSetTextMatrix(ctx, xform); const char *arrayDataForXAxis = [[weekDays objectAtIndex:intIndex] UTF8String]; CGContextShowTextAtPoint(ctx, fltX1+27, fltY2+20 , arrayDataForXAxis, strlen(arrayDataForXAxis)); CGContextStrokePath(ctx); ifdef _DEBUG NSLog(@"End of drawing X-Axis"); endif //NSValue *xAxis = [NSValue valueWithCGPoint:CGPointMake((tCoordianates->x = fltX1+40), (tCoordianates->y = fltY2+18))]; // [xAxisCoordinates addObject:xAxis]; ifdef _DEBUG //NSLog(@"The value of xAxisCoordintes: %@", xAxisCoordinates); NSLog(@"frmGraph_drawRect_end"); endif } CGContextSetLineWidth(ctx, 10.0); fltX1 = 25; fltY1 = 235; fltX2 = 320; fltY2 = fltY1; NSArray *coordinate1 = [[NSArray alloc] initWithObjects:@"65",@"105",@"145",@"185",@"225",@"265",@"305",nil]; NSArray *coordinate2 = [[NSArray alloc] initWithObjects:@"214",@"174",@"154",@"134",@"114",@"74",@"34",nil]; ifdef _DEBUG NSLog(@"Fuction of Bar_start"); endif for(int intIndex = 0; intIndex < [coordinate1 count], intIndex < [coordinate2 count]; fltX1+=40, intIndex++) { //CGContextSetRGBFillColor(ctx, 0, 0, 245, 1); CGContextMoveToPoint(ctx, fltX1+40, fltY2+19); const char *arrayDataForCoordinate1 = [[coordinate1 objectAtIndex:intIndex] UTF8String]; const char *arrayDataForCoordinate2 = [[coordinate2 objectAtIndex:intIndex] UTF8String]; CGContextAddLineToPoint(ctx, (atof(arrayDataForCoordinate1)), atof(arrayDataForCoordinate2)); } ifdef _DEBUG NSLog(@"Fuction of Bar_end"); endif CGContextClosePath(ctx); CGContextStrokePath(ctx); [hoursInDays release]; [weekDays release]; [coordinate1 release]; [coordinate2 release]; hoursInDays = nil; weekDays = nil; coordinate1 = nil; coordinate2 = nil; } - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } (void)viewDidUnload { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } (void)dealloc { [super dealloc]; } @end please help me out its urgent

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  • Correct way to set the driverOptions for Doctrine DBAL configuration in symfony2

    - by yesIcan
    I have set driverOptions in the config file as mentioned in the doctrine DBAL documentation. But this gives and error 1/1 InvalidConfigurationException: Unrecognized options "driverOptions" under "doctrine.dbal.connections.pdoDevCon" My config file is dbal: default_connection: pdoDevCon connections: pdoDevCon: driver: %dev_database_driver% # < host: %dev_database_host% # | port: %dev_database_port% # | Defined in user: %dev_database_user% # | password: %dev_database_password% # < charset: UTF8 driverOptions: {3: 2} mapping_types: enum: string set: string orm: auto_generate_proxy_classes: %kernel.debug% pdoDevCon: connection: pdoDevCon mappings: AcmeDemoBundle: ~ AcmeHelloBundle: ~ I am using PDO::ATTR_ERRMODE as 3 PDO::ERRMODE_EXCEPTION as 2, it does not work even if i use the strings.

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  • Multiple domains on a single rails app

    - by Anant
    This is the first time I'm creating an app using Ruby on Rails. I would like to switch the database depending on the site which is loaded. With php I used to do a simple strpos on http host, and set the database name depending on that. How can I do this with rails?

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  • MySQL DUMP as CSV

    - by swt83
    I've looked around and nothing seems to work: $file = '/path/to/file.csv'; $cmd = 'mysqldump DATABASE TABLE > '.$file.' --host=localhost --user=USER --password=PASS'; $cmd .= ' --lock-tables=false --no-create-info --tab=/tmp --fields-terminated-by=\',\''; exec($cmd); Everything I try creates an empty CSV file. Any ideas? Thanks much.

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  • Ignore SSL errors in Zend_Http_Client

    - by webdestroya
    In PHP curl there are two functions used to ignore all SSL errors (invalid cert, self signed, expired, so on): curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); I am switching over to use Zend_Http_Client, but I can't seem to find a way to force it to ignore errors. (I don't have a way to test it just yet, I wanted to see if anybody has done this before) So, does anybody know the equivalent function/functions to do this in Zend_Http_Client?

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  • UIImageWriteToSavedPhotosAlbum showing memory leak with iPhone connected to Instruments

    - by user168739
    Hi, I'm using version 3.0.1 of the SDK. With the iPhone connected to Instruments I'm getting a memory leak when I call UIImageWriteToSavedPhotosAlbum. Below is my code: NSString *gnTmpStr = [NSString stringWithFormat:@"%d", count]; UIImage *ganTmpImage = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:gnTmpStr ofType:@"jpg"]]; // Request to save the image to camera roll UIImageWriteToSavedPhotosAlbum(ganTmpImage, self, @selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:), nil); and the selector method - (void)imageSavedToPhotosAlbum:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo { NSString *message; NSString *title; if (!error) { title = @"Wallpaper"; message = @"Wallpaper Saved"; } else { title = @"Error"; message = [error description]; } UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:message delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show]; [alert release]; } Am I forgetting to release something once the image has been saved and the selector method imageSavedToPhotosAlbum is called? Or is there a possible known issue with UIImageWriteToSavedPhotosAlbum? Here is the stack trace from Instruments: Leaked Object: GeneralBlock-3584 size: 3.50 KB 30 MyApp start 29 MyApp main /Users/user/Desktop/MyApp/main.m:14 28 UIKit UIApplicationMain 27 UIKit -[UIApplication _run] 26 GraphicsServices GSEventRunModal 25 CoreFoundation CFRunLoopRunInMode 24 CoreFoundation CFRunLoopRunSpecific 23 GraphicsServices PurpleEventCallback 22 UIKit _UIApplicationHandleEvent 21 UIKit -[UIApplication sendEvent:] 20 UIKit -[UIWindow sendEvent:] 19 UIKit -[UIWindow _sendTouchesForEvent:] 18 UIKit -[UIControl touchesEnded:withEvent:] 17 UIKit -[UIControl(Internal) _sendActionsForEvents:withEvent:] 16 UIKit -[UIControl sendAction:to:forEvent:] 15 UIKit -[UIApplication sendAction:toTarget:fromSender:forEvent:] 14 UIKit -[UIApplication sendAction:to:from:forEvent:] 13 CoreFoundation -[NSObject performSelector:withObject:withObject:] 12 UIKit -[UIBarButtonItem(Internal) _sendAction:withEvent:] 11 UIKit -[UIApplication sendAction:to:from:forEvent:] 10 CoreFoundation -[NSObject performSelector:withObject:withObject:] 9 MyApp -[FlipsideViewController svPhoto] /Users/user/Desktop/MyApp/Classes/FlipsideViewController.m:218 8 0x317fa528 7 0x317e3628 6 0x317e3730 5 0x317edda4 4 0x3180fc74 3 Foundation +[NSThread detachNewThreadSelector:toTarget:withObject:] 2 Foundation -[NSThread start] 1 libSystem.B.dylib pthread_create 0 libSystem.B.dylib malloc I did a test with a new project and only added this code below in the viewDidLoad: NSString *gnTmpStr = [NSString stringWithFormat:@"DefaultTest"]; UIImage *ganTmpImage = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:gnTmpStr ofType:@"png"]]; // Request to save the image to camera roll UIImageWriteToSavedPhotosAlbum(ganTmpImage, nil, nil, nil); The same leak shows up right after the app loads Thank you for the help. Bryan

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  • Heroku deployment: connection refused

    - by Toby Hede
    I have suddenly run into an issue deploying to Heroku. I created a new app, went to push and now see: ssh: connect to host heroku.com port 22: Connection refused My other previously working Heroku apps no longer work, receiving the same error. Other Heroku commands work (create, info, db:push). I can SSH to other services, so it doesn't look like it's my machine. Any ideas?

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  • tabBarController popToRooTViewControler

    - by Jacob
    Every time a user changes a tab, for the selected tab I want to push it to its top level controller. I have implemented the delegate method for the Tabbarcontroller like this: - (void) tabBarControler:(UITabBarController )tabBarController didSelectViewController:(UIViewController)viewController{ [[self navigationController] popToRootViewController Animated:NO]; } This does nto seem to work but I can confirm the method is being called every time I change tabs

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  • Cassini with Windows 7 XP Mode

    - by Douglas
    Is there a way to access the Cassini local web server from Windows 7's XP mode? I'm developing on the Windows 7 host machine using Cassini, but would like to test in IE6 running inside the Windows XP guest.

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  • Objective-c memory management

    - by Chris
    I have a method which runs this: Track* track = [[Track alloc] init:[obj objectForKey:@"PersistentID"] :[obj objectForKey:@"Name"] :[obj objectForKey:@"Artist"] :(NSInteger*)[obj objectForKey:@"Total Time"] :(NSInteger*)[obj objectForKey:@"Play Count"]]; [self setCurrentTrack:(Track*) track]; [track release]; Do I have to release track?

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  • NSKeyedUnarchiver chokes when trying to unarchive more than one object

    - by ajduff574
    We've got a custom matrix class, and we're attempting to archive and unarchive an NSArray containing four of them. The first seems to get unarchived fine (we can see that initWithCoder is called once), but then the program simply hangs, using 100% CPU. It doesn't continue or output any errors. These are the relevant methods from the matrix class (rows, columns, and matrix are our only instance variables): -(void)encodeWithCoder:(NSCoder*) coder { float temp[rows * columns]; for(int i = 0; i < rows; i++) { for(int j = 0; j < columns; j++) { temp[columns * i + j] = matrix[i][j]; } } [coder encodeBytes:(const void *)temp length:rows*columns*sizeof(float) forKey:@"matrix"]; [coder encodeInteger:rows forKey:@"rows"]; [coder encodeInteger:columns forKey:@"columns"]; } -(id)initWithCoder:(NSCoder *) coder { if (self = [super init]) { rows = [coder decodeIntegerForKey:@"rows"]; columns = [coder decodeIntegerForKey:@"columns"]; NSUInteger * len; *len = (unsigned int)(rows * columns * sizeof(float)); float * temp = (float * )[coder decodeBytesForKey:@"matrix" returnedLength:len]; matrix = (float ** )calloc(rows, sizeof(float*)); for (int i = 0; i < rows; i++) { matrix[i] = (float*)calloc(columns, sizeof(float)); } for(int i = 0; i < rows *columns; i++) { matrix[i / columns][i % columns] = temp[i]; } } return self; } And this is really all we're trying to do: NSArray * weightMatrices = [NSArray arrayWithObjects:w1,w2,w3,w4,nil]; [NSKeyedArchiver archiveRootObject:weightMatrices toFile:@"weights.archive"]; NSArray * newWeights = [NSKeyedUnarchiver unarchiveObjectWithFile:@"weights.archive"]; What's driving us crazy is that we can archive and unarchive a single matrix just fine. We've done so (successfully) with a matrix many times larger than these four combined.

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