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  • Using Mapping Models to migrate between Core Data Object Models

    - by westsider
    I have a fairly simply scheme. Essentially, Run <-- Data (where a Run holds a data, e.g., Temperature, sampled from some sort of sensor). Now, it seems that sensors can have more than one measurement (e.g., Temperature and Humidity). So, a single Run could have multiple data samples. Hence, Run <-- Sample and Sample <-- Data. (And for simplicity I am leaving Run <-- Data in place, for now.) If I create a new mapping model, then things generally work - except that no new Samples are created, no relationships are established between Runs and Samples nor between Samples and Datas. I am trying to get mapping model to migrate my model but even the slightest change to the generated mapping model results in Cocoa error 134110. For example, if I take the "Sample" mapping (which has no Source) and set its Source to 'Run' (so that I can set Sample's inverse relationship 'run' appropriately) then the mapping changes its name to "RunToSample". There are two relationships handled in this mapping: data and run. The data property gets set automatically to FUNCTION($manager, "destinationInstancesForEntityMappingNamed:sourceInstances:" , "DataToData", $source.dataSet) Following this example, I set the run property to FUNCTION($manager, "destinationInstancesForEntityMappingNamed:sourceInstances:" , "RunToRun", $source) Similarly, I set the 'sample' property mapping in RunToRun to FUNCTION($manager, "destinationInstancesForEntityMappingNamed:sourceInstances:" , "RunToSample", $source) and the 'sample' property in DataToData to FUNCTION($manager, "destinationInstancesForEntityMappingNamed:sourceInstances:" , "RunToSample", $source.run) So, what, I wonder, is going wrong? I have tried various permutations, such as leaving the 'inverse' relationships unspecified. But I continue to get the same error (134110) regardless. I imagine that this is a lot easier than it seems and that I am missing some fundamental but minor piece. I have also tried subclassing NSEntityMigrationPolicy and overriding -createDestinationInstancesForSourceInstance: but these efforts have met with much the same results. Thanks in advance for any pointers or (relevant :-) advice.

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  • popViewController does not autorotate back to allowed orientation

    - by JoeGaggler
    I have two UIViewControllers, "A" and "B", where "A" overrides the shouldAutorotateToInterfaceOrientation to return YES for UIInterfaceOrientationPortrait, and "B" returns YES for all orientations. In my example "A" is the root navigation view controller, and I then use pushViewController for "B". After that I rotate the device into landscape, which successfully autorotates "B", then I pop "B" (back button or via popViewController) to return to "A". When targetting iPhone OS 3.1.3, "A" returns to the portrait orientation as expected. When targetting iPhone OS 3.2, I have two side-effects: "A" is displayed in landscape. The navigation bar does not update even though "A" is now displayed. The navigation bar still shows the items for "B". Only after trying to go back/pop one more time will the navigation bar animate to show the items for "A". If I instead attempt to push "B" again and go back, I have to pop twice before the navigation bar animates to show the items for "A". During these "intermediate pops" the view for "A" remains displayed. While researching this issue, I have seen other answers suggesting performing the rotation manually ([UIDevice setOrientation] or via a tranformation), however this does not help understand what the problem is, especially why it behaves differently between the two OS's. So my question is: must all of my UIViewControllers on the UINavigationController stack support exactly the same orientations going forward? And if not, then is there something that I need to do to make it behave as it did for OS 3.1.3?

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  • Cocoa Touch UITableView Alphabetical '#' Match All Unmatched

    - by Kevin Sylvestre
    I have a UITableView containing names that I would like to group (and sort) by the first letter (similar to the Address Book application). I am currently able to match any section ('A'-'Z') using: // Sections is an array of strings "{search}" and "A" to "Z" and "#". NSString *pattern = [self.sections objectAtIndex:section]; NSPredicate *predicate = nil; // Ignore search pattern. if ([pattern isEqualToString:@"{search}"]) return nil; // Non-Alpha and Non-Diacritic-Alpha (?). if ([pattern isEqualToString:@"#"]); // Default case (use case and diacritic insensitivity). if (!predicate) predicate = [NSPredicate predicateWithFormat:@"name beginswith[cd] %@", pattern]; // Return filtered results. return [self.friends filteredArrayUsingPredicate:predicate]; However, matching for the '#' eludes me. I tried constructing a REGEX match using: [NSPredicate predicateWithFormat:@"name matches '[^a-zA-Z].*'"]; But this fails for diacritic-alpha (duplicate rows appear). Any ideas would be greatly appreciated! Thanks.

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  • CGContext rotation

    - by kasperjj
    I have a 100x100 pixel image that I want to draw at various angles rotated around the center of the image. The following code works, but rotates around the original origo of the coordinate system (upper left hand corner) and not the translated location. Thus the image is not rotated around itself but around the upper left corner of the screen. CGContextRef context = UIGraphicsGetCurrentContext(); CGContextTranslateCTM(context, -50, -50); CGContextRotateCTM (context, 0.3); CGContextTranslateCTM(context,768/2,1024/2); [image drawAtPoint:CGPointMake(0,0)]; I tried doing the same using CGAffineTransform, but got the same results.

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  • Editable table view cell

    - by Koning Baard XIV
    I am creating an application. I have to implement a bookmark feature, and adding one should be similar to this: I want editable UITableViewCells for text input. I was wondering if there is an easier way then embedding a UITextField into a UITableViewCell. And if not, can someone explain how I can use the UITextField inside it? Thanks

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  • XCode: Block support disabled

    - by Nic Hubbard
    XCode is warning me that Blocks support is disabled, and to compile with -fblocks. I have added -fblocks to the Other Linker Flags section. But compiling again gives me the same error. I am using iOS4 GM. Any ideas on how to fix this?

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  • How do I reset the scale/zoom of a web app on an orientation change on the iPhone?

    - by Elisabeth
    I'm having the same problem that a couple of others have had with getting the correct behavior in a web app on an orientation change, and there doesn't seem to be an obvious solution - I've seen this question asked a couple of times on Stack Overflow and no one's yet been able to answer it. When I start the app in portrait mode, it works fine. Then I rotate into landscape and it's scaled up. To get it to scale correctly for the landscape mode I have to double tap on something twice, first to zoom all the way in (the normal double tap behavior) and again to zoom all the way out (again, the normal double tap behavior). When it zooms out, it zooms out to the correct NEW scale for landscape mode. Switching back to portrait seems to work more consistently; that is, it handles the zoom so that the scale is correct when the orientation changes back to portrait. I am trying to figure out if this is a bug? or if this is something that can be fixed with Javascript? With the viewport meta content, I am setting the initial-scale to 1.0 and I am NOT setting minimum or maximum scale (nor do I want to). I am setting the width to device-width. Any ideas? I know a lot of people would be grateful to have a solution as it seems to be a persistent problem. Thank you!

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  • Automatically created NSManagedObject subclasses don't use ARC

    - by Jordan
    My project is ARC enabled (the build settings have Objective-C Reference Counting set to YES). There are no file exceptions to this, it is enabled project wide. (Latest stable version of Xcode). When I create an NSManagedObject subclass via File New for a Core Data entity, the generated header uses the following in its property declarations: @property (nonatomic, retain) But 'retain' is not ARC!! Is this a bug, or is there something I'm missing or not understanding? There are no build warnings - if this is a bug though, how can I remedy it?

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  • prevent UIWebView inputs from displaying UIKeyboard without disabling user interaction

    - by Slee
    I have a UIWebView that loads and external product configuration web service UI that is basically a bunch of dependent Drop Down lists. The problem is the Drop Downs are basically enhanced text input's so when the user taps them to display the options the UIKeyboard keeps popping up and own after they make their selection. it is less than a fluid process. Is there anyway to suppress the html inputs from triggering the UIKeyboard?

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  • Where would I implement this array to pass?

    - by Keeano Martin
    I currently build an NSMutableArray in Class A.m within the ViewDidLoad Method. - (void)viewDidLoad { [super viewDidLoad]; //Question Array Setup and Alloc stratToolsDict = [[NSMutableDictionary alloc] initWithObjectsAndKeys:countButton,@"count",camerButton,@"camera",videoButton,@"video",textButton,@"text",probeButton,@"probe", nil]; stratTools = [[NSMutableArray alloc] initWithObjects:@"Tools",stratToolsDict, nil]; stratObjectsDict = [[NSMutableDictionary alloc]initWithObjectsAndKeys:stratTools,@"Strat1",stratTools,@"Strat2",stratTools,@"Strat3",stratTools,@"Strat4", nil]; stratObjects = [[NSMutableArray alloc]initWithObjects:@"Strategies:",stratObjectsDict,nil]; QuestionDict = [[NSMutableDictionary alloc]initWithObjectsAndKeys:stratObjects,@"Question 1?",stratObjects,@"Question 2?",stratObjects,@"Question 3?",stratObjects,@"Question 4?",stratObjects,@"Question 5?", nil]; //add strategys to questions QuestionsList = [[NSMutableArray alloc]init]; for (int i = 0; i < 1; i++) { [QuestionsList addObject:QuestionDict]; } NSLog(@"Object: %@",QuestionsList); At the end of this method you will see QuestionsList being initialized and now I need to send this Array to Class B. So I place its setters and getters using the @property and @Synthesize method. Class A.h @property (retain, nonatomic) NSMutableDictionary *stratToolsDict; @property (retain, nonatomic) NSMutableArray *stratTools; @property (retain, nonatomic) NSMutableArray *stratObjects; @property (retain, nonatomic) NSMutableDictionary *QuestionDict; @property (retain, nonatomic) NSMutableArray *QuestionsList; Class A.m @synthesize QuestionDict; @synthesize stratToolsDict; @synthesize stratObjects; @synthesize stratTools; @synthesize QuestionsList; I use the property method because I am going to call this variable from Class B and want to be able to assign it to another NSMutableArray. I then add the @property and @class for Class A to Class B.h as well as declare the NSMutableArray in the @interface. #import "Class A.h" @class Class A; @interface Class B : UITableViewController<UITableViewDataSource, UITableViewDelegate>{ NSMutableArray *QuestionList; Class A *arrayQuestions; } @property Class A *arrayQuestions; Then I call NSMutableArray from Class A in the Class B.m -(id)initWithStyle:(UITableViewStyle)style { if ([super initWithStyle:style] != nil) { //Make array arrayQuestions = [[Class A alloc]init]; QuestionList = arrayQuestions.QuestionsList; Right after this I Log the NSMutableArray to view values and check that they are there and it returns NIL. //Log test NSLog(@"QuestionList init method: %@",QuestionList); Info about Class B- Class B is a UIPopOverController for Class A, Class B has one View which holds a UITableView which I have to populate the results of Class A's NSMutableArray. Why is the NsMutableArray coming back as NIL? Ultimately would like some help figuring it out as well, it seems to really have me confused. Help is greatly appreciated!!

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  • Problem after dismissing a modal view used in conjunction with a uisplitviewcontroller

    - by user336274
    I'm having a hard time understanding why the following is happening (and how to fix it). I've created an application using the split-view based application. I've added a UiBarButtonItem called showTheModal which calls this method found in RootViewController.m: - (IBAction)showTheModal:(id)sender { theModalController.modalPresentationStyle = UIModalPresentationFullScreen; theModalController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve; [self presentModalViewController:theModalController animated:YES]; if ([detailViewController popoverController] != nil) [[detailViewController popoverController] dismissPopoverAnimated:YES]; The BarButtonItem of course, is shown at the bottom of the Default Root Controller (left side of the of the split view in landscape) or at the bottom of the popup (if in landscape). The modal view is dismissed by a button placed in a toolbar. It calls the following: [self dismissModalViewControllerAnimated: YES]; The problem I'm having is if rotate the screen, while the modal is up. Here is what happens in different scenarios (start refers to the orientation when the showTheModal button is hit, end refers to the orientation when I hit the dismissModal button). 1)Start landscape, end landscape: Everything appears fine. willHideViewController and willShowViewController methods are not called in the RootViewController (as expected) 2) Start landscape, end portrait: UI appears fine. willHideViewController is run TWICE (WHY?) 3) Start portrait, end portrait: UI appears fine. willHideViewController is run once (as expected) 4) Start portrait, end landscape: The 'Root List' button remains in the detail view (right side of the split view. Neither willHideViewController and willShowViewController are invoked (WHY??) Any thoughts as to why #2 and #4 don't behave quite the expected way?

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  • Determine the length of an audio recording?

    - by MikeN
    How do I determine the length of an audio recording I am recording programaticaly? My current solution is to just time the start/stop recording events on the User Interface (literally the time the user hits record, then hits stop recording.) Given a .aac audio file, is there some library call in Objective-C or Python to determine its length?

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  • Prevent UIGestureRecognizer from firing selector more than once

    - by JK
    I utilize a UILongPressGestureRecognizer in my app. This is a continuous gesture recognizer which means it continuously fires the selector for the target it was initialized with. I would like the selector to be fired only once. I have tried to prevent further selectors being fired by setting the gesture recognizer's enabled property to Note the first time the selector is fired, but this only takes effect after the selector is fired again. How can I ensure the selector is fired only once?

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  • MKMapView not centered on pin

    - by Val Smith
    Hi all, I have an mkmapview that i'm currently adding pins to, but for some reason when I call [mapView setRegion:[detailItem coordinateRegion] animated:YES]; the pin is off-centered (toward the right side of the screen) on the map. Here is the code for [deailItem coordinateRegion]: - (MKCoordinateRegion)coordinateRegion { MKCoordinateRegion region = { {0.0, 0.0 }, { 0.0, 0.0 } }; region.center = self.coordinate; region.span.longitudeDelta = 0.0075f; region.span.latitudeDelta = 0.0075f; return (region); } I'm setting the coordinateRegion's center to the object's x,y coordinate, so why is it off-center on the map? I feel like there's something I'm missing here... ::Val::

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  • populate UITableView from json

    - by mcgrailm
    Hello all working on my building my first iDevice app and I am trying to populate a UITableView with data from json result I can get it to load from plist array no propblem and I can even see my json the problem I'm having is that the UITableView never gets to see the json results please bare with me as this is first time with obj-c or anything like it in my .h file @interface TableViewViewController : UIViewController <UITableViewDataSource, UITableViewDelegate> { NSArray *exercises; NSMutableData *responseData; } in my .m file - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return exercises.count; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { //create a cell UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"]; // fill it with contnets cell.textLabel.text = [exercises objectAtIndex:indexPath.row]; // return it return cell; } // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { responseData = [[NSMutableData data] retain]; NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://url_to_json"]]; [[NSURLConnection alloc] initWithRequest:request delegate:self ]; // load from plist //NSString *myfile = [[NSBundle mainBundle] pathForResource:@"exercise" ofType:@"plist"]; //exercises = [[NSArray alloc] initWithContentsOfFile:myfile]; [super viewDidLoad]; } - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { [responseData setLength:0]; } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { [responseData appendData:data]; } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog(@"Connection failed: %@", [error description]); } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { [connection release]; NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; [responseData release]; NSDictionary *dictionary = [responseString JSONValue]; NSArray *response = [dictionary objectForKey:@"response"]; exercises = [[NSArray alloc] initWithArray:response]; }

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  • Using info.plist for storing target-specific values for a multi-target app

    - by andybee
    I have a multi-target iPhone app which currently includes a header file with constant definitions that are conditionally included at build time depending on which target is being built. However, I was wondering if it might be better to instead include this information in the info.plist for the build, as this generally holds target-specific meta, so logically seems more appropriate. Therefore, my questions are: Is it acceptable to include custom (non-Apple defined) keys in the info.plist file? Is this a suitable place to include meta for the app which changes between targets?

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  • [IOS SDK] retrieving scores from game center

    - by Sam
    I got this code from apple's developer site. How do i process the score information to be viewed in a like a UITableView or something? (void) retrieveTopTenScores { GKLeaderboard *leaderboardRequest = [[GKLeaderboard alloc] init]; if (leaderboardRequest != nil) { leaderboardRequest.playerScope = GKLeaderboardPlayerScopeGlobal; leaderboardRequest.timeScope = GKLeaderboardTimeScopeAllTime; leaderboardRequest.range = NSMakeRange(1,10); [leaderboardRequest loadScoresWithCompletionHandler: ^(NSArray *scores, NSError *error) { if (error != nil) { // handle the error. } if (scores != nil) { // process the score information. } }]; } }

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  • Modal Tab Bar ViewController

    - by Kevin Sylvestre
    I need to present a modal tab bar controller using interface builder. I'd like to be able to specify and design the tab bar controller in a InfoViewController.xib file, then present it from a variety of locations within the application using something like: UIViewController *vc = [InfoViewController create]; [self presentModalViewController:vc animated:YES];

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  • Outline view from UITableView

    - by Raj
    Hi guys, I need to implement a 1 level outline view out of UITableView. The cells which have children in them will have a '+' symbol and if user taps on it, the cells below it should slide down and the children cells of current selected row should appear. The sliding of cells should be visible and if the user taps '-' button of the already expanded row, the children cells should slide back into the parent. I have tried googling but did not find any pointers. How should I start, should I subclass UITableView? Or should I implement my own view sub-class and handle all the stuff there? I somehow feel it would be easier to sub-class UITableView because it will handle all the row selection for us, but I cannot figure out how to do it. Thanks and Regards, Raj

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  • Getting Tap/Touch Position when selecting a TableView cell

    - by Omer
    Hi, hope to get some help here because this is something that really makes me mad... I have a view with a tableView, and when I tap a cell I want to present a popOver window pointing the arrow to the cell I tapped. the things that I think I need is: 1- the position of the cell in the screen (not in the view, because on large tables the Y value of the cell's rect could be grater than screen hight) or 2- a CGPoint or something similar that represents the point in the screen I tapped. I can't figured this out, and makes me really mad!!! Any help will very very very very usefull. Have a nice day.

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  • Create a Editable Grid View as in iBooks

    - by tilomitra
    There have been some similar questions asked regarding Grid views, but none have been sufficiently answered (some have been left unanswered as the SDKs were under NDAs at the time). The question is: Can anyone direct me towards a tutorial, or explain to me what steps to take to create a Grid View similar to iBooks, or the Yahoo! Entertainment app on the iPhone? Here's a screenshot of what I mean.

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