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• Loading UINavigationController subclass from a Nib

  - by Rits

  My situation is as follows: My class SettingsViewController is a subclass of UINavigationController. That class contains the logic of its rootViewController. For example, it acts as the delegate and data source for two table views in that root view controller. I have no problem setting this up programmatically. In the initializer of SettingsViewController, I can create an additional UIViewController to serve as the root view controller, position the table views in its view, and set their delegates and data sources to self. But I want to load that root view via a Nib. The problem is, I do not know how to connect that Nib with my SettingsViewController, how to set the delegates and data sources. The SettingsViewController is not accessible from within the Nib. 'File Owner' represents the root view controller, not the SettingsViewController. How do I access my UINavigationController subclass from within my root view controllers Nib? Thanks in advance.

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• how to set Custom attribute of NSManagedObject which is calculated from other attributes ?

  - by Kundan

  I am using core data framework to manage objects.i have an entity which has several attributes of decimal types. Among them is attribute which is mathematically calculated from other attributes. Ex :- @interface Marks : NSManagedObject { } @property (nonatomic, retain) NSDecimalNumber * answerGradeA; @property (nonatomic, retain) NSDecimalNumber * answerGradeB; @property (nonatomic, retain) NSDecimalNumber * answerGradeC; @property (nonatomic, retain) NSDecimalNumber * total; Here i want attribute total = 3xanswerGradeA + 2xanswerGradeB + 1xanswerGradeC if it is possible to do like this, then how ? please reply. Thanks in advance.

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• SQLite3 or SQLite Manager make me crazy !!! Please help me !! I have a presentation next week

  - by ahmet732

  My friend added 90 rows into the database, I tied it up to my app. In my table view name of my variables are shown in proper fashion but when I tapped one of them, in detailsViewController their description is wrong. It shows very old description of variables not the new ones in database. Moreover, it displays the same description for different variables. What's the problem ? What am i missing? My database is correct. It displays same desscriptions for different values. It makes me worried about. Additionally, when I added a new row to my db, it accepts it but it does not perceive it when i run the app. It shows new row in my tableview if and only if I change the name of my db file. I do not want to use another SQL manager ..

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• Cocoa : How do I catch drag operations initiated from an IKBrowserView?

  - by bucketmouse

  So I've got an IKBrowserView all wired up and happily dragging my custom datatype (provided lazily via PasteboardItem) from one window to another, but now I'm interested in detecting when the user drops some data onto the trashcan. Cocoa's documentation says to check the return type of the drag operation itself, but how exactly do I do this with an IKBrowserView? Once I call imageBrowser:writeItemsAtIndexes:toPasteboard: I don't seem to get any notifications other than the request for the pasteboard contents, which doesn't provide a pointer to the drag operation that invoked it.

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• Creating a method for wrapping a loaded image in a UIImageView

  - by eco_bach

  I have the following un my applicationDidFinishLaunching method UIImage *image2 = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"image2.jpg" ofType:nil]]; view2 = [[UIImageView alloc] initWithImage:image2]; view2.hidden = YES; [containerView addSubview:view2]; I'm simply adding an image to a view. But because I need to add 30-40 images I need to wrap the above in a function (which returns a UIImageView) and then call it from a loop. This is my first attempt at creating the function -(UIImageView)wrapImageInView:(NSString *)imagePath { UIImage *image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:imagePath ofType:nil]]; UIImageView *view = [[UIImageView alloc] initWithImage:image]; view.hidden = YES; } And then to invoke it I have the following so far, for simplicity I am only wrapping 3 images //Create an array and add elements to it NSMutableArray *anArray = [[NSMutableArray alloc] init]; [anArray addObject:@"image1.jpg"]; [anArray addObject:@"image2.jpg"]; [anArray addObject:@"image3.jpg"]; //Use a for each loop to iterate through the array for (NSString *s in anArray) { UIImageView *wrappedImgInView=[self wrapImage:s]; [containerView addSubview:wrappedImgInView]; NSLog(s); } //Release the array [anArray release]; I have 2 general questions 1-Is my approach correct?, ie following best practices, for what I am trying to do (load a multiple number of images(jpgs, pngs, etc.) and adding them to a container view) 2-For this to work properly with a large number of images, do I need to keep my array creation separate from my method invocation? Any other suggestions welcome!

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• Read Call History from iPhone on iOS 5 and above

  - by Sandeep Dhama

  I am developing an application and need to read the users call history from iPhone.I have go though all the forums and google it and found that we can get the records from teh callHistory sqlite database by "private/var/root/Library/CallHistory/call_history.db". But this path is not working from iOS 5 and above. Seems like apple has changed all their database path and structure so that no one can accees it. I have also seen some of the application on iTunes who are capable of getting the users call history like:-https://itunes.apple.com/us/app/callog/id327883585?mt=8 I have also check a mac desktop utility called "WonderShare Dr.Fone" which will fetch all the data from your iPhone like call history messages, notes , etc.How this utility is fetching the call history records and other details? If their is any API or private APIs by which i can get the callHistory data path please let me know.

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• Stepping thru a plist to get at info

  - by cannyboy

  If I've got a plist set up like this Key Type Value Root Array Item 0 Dictionary -Title String Part One -Description String Welcome to part one. Have fun Item 1 Dictionary -Title String Part Two -Description String Welcome to part two. Fun too. Item 2 Dictionary -Title String Part Three -Description String Welcome to part three. It's free Item 3 Dictionary -Title String Part Four -Description String It's part four. No more How would I step thru to put all the titles in one array, and all the descriptions into another?

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• "out of scope" error when iterating an NSMutableArray

  - by wgpubs

  Why am I getting an "out of scope" error whenever I try to access the "url" variable in this loop? for(NSString *url in self.winnerImageURLs) { [mediaItemString appendFormat:@"{\"type\":\"image\",\"src\":\"%@\",\"href\":\"%@\"},", url, url]; } The class of very item in the "self.winnerImageURLs" NSMutableArray comes back as NSCFString so I'm not sure what the dealio is here. Any ideas on what I'm doing wrong??? Thanks

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• Setting synthesized arrays causing memory leaks using nested arrays

  - by webtoad

  Hello: Why is the following code causing a memory leak in an iPhone App? All of the initted objects below leak, including the arrays, the strings and the numbers. So, I'm thinking it has something to do with the the synthesized array property not releasing the object when I set the property again on the second and subsequent time this piece of code is called. Here is the code: "controller" (below) is my custom view controller class, which I have a reference to, and I am setting with this code snippet: sqlite3_stmt *statement; NSMutableArray *foo_IDs = [[NSMutableArray alloc] init]; NSMutableArray *foo_Names = [[NSMutableArray alloc] init]; NSMutableArray *foo_IDsBySection = [[NSMutableArray alloc] init]; NSMutableArray *foo_NamesBySection = [[NSMutableArray alloc] init]; // Get data: NSString *sql = @"select distinct p.foo_ID, p.foo_Name from foo as p "; if (sqlite3_prepare_v2(...) == SQLITE_OK) { while (sqlite3_step(statement) == SQLITE_ROW) { int p_id; NSString *foo_Name; p_id = sqlite3_column_int(statement, 0); char *str2 = (char *)sqlite3_column_text(statement, 1); foo_Name = [NSString stringWithCString:str2]; [foo_IDs addObject:[NSNumber numberWithInt:p_id]]; [foo_Names addObject:foo_Name]; } sqlite3_finalize(statement); } // Pass the array itself into another array: // (normally there is more than one array in each array) [foo_IDsBySection addObject: foo_IDs]; [foo_NamesBySection addObject: foo_Names]; [foo_IDs release]; [foo_Names release]; // Set some synthesized properties (of type NSArray, nonatomic, // retain) in controller: controller.foo_IDsBySection = foo_IDsBySection; controller.foo_NamesBySection = foo_NamesBySection; [foo_IDsBySection release]; [foo_NamesBySection release]; Thanks for any help!

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• iOS - Application logging test and production code

  - by Peter Warbo

  I am doing a bunch of logging when I'm testing my application which is useful for getting information about variable state and such. However I have read that you should use logging sparsely in production code (because it can potentially slow down your application). But my question is now: if my app is in production and people are using it, whenever a crash (god forbid) occurs, how will I be able to interpret the crash information if I have removed the logging statements? Then I suppose I will only have a stacktrace for me to interpret? Does this mean I should leave logging in production code only WHERE it's really essential for me to interpret what has happened? Also how will the logging statements relate to the crash reports? Will they be combined? I'm thinking of using Flurry as analytics and crash reports...

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• How does Mach-O loader loads different NSString objects?

  - by overboming

  I have known that If you define a bunch of @"" NSString objects in the source code in Mac OS. These NSStrings will be stored in a segment in the Mach-O library. Section sectname __ustring segname __TEXT addr 0x000b3b54 size 0x000001b7 offset 731988 align 2^1 (2) reloff 0 nreloc 0 flags 0x00000000 reserved1 0 reserved2 0 If I hex dump the binary, they are aligned closely one by one with a 0x0000as separator. What I want to know is how does the loader in Mac OS X load these NSStrings when the program runs? Are they loaded simpily by recognize the 0x0000 separator or these is a string offset table elsewhere in the binary pointing to separate NSString objects? Thanks. (What I really want to do is the increase the length of one of the NSString, so I have to know how the loader recognize these separate objects)

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• dismissViewControllerAnimated completion block presenter view and modal view flow

  - by Patricia LaRue

  I did find an answer to this title and I did do a little research but I'm still not getting the flow. Here is what I want to happen: 1) click a button on the presenter view to open a modal view. 2) retrieve some value and click a button to close the modal view....sending the value to the presentor view and execute a method. I get that this works like a callback but I still can't figure out where to put the callback stuff. So, how exactly do I do this? A) In the presentViewController completion block, should I include the presenter view method to execute when modal view is completed? Or: B) In the modal view's dismissViewControllerAnimated completion block, should I include the presenter view method to execute when modal view is completed? Can somebody help me with some sample code? Or at least help me get the flow of which block to put the code in? Thank you, P

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• How to enable iPhone auto lock during MPMoviePlayer playback?

  - by obiwahn

  When I play a video with MPMoviePlayerController in my app my iPhone does not auto lock (tested OS 3.0 & 3.1.2). However, the application.idleTimerDisabled = NO, so this setting is not affected by MPMoviePlayerController. How can I get my iPhone to sleep normally (e.g. after 3 min screen dims, then goes dark) when my app is running and playing a video?

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• Core Text CTFrameSetter error with size suggestion

  - by JK

  I am trying to use the CTFramesetterSuggestFrameSizeWithConstraints method of CTFrameSetter to calculate the rect for a given attributed string. However, both the width and height are slightly less than needed. I would appreciate any suggestions on what may be causing this or how to correct it please.

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• NSTableView don't display data

  - by Tomas Svoboda

  HI, I have data in NSMutableArray and I want to display it in NSTableView, but only the number of cols has changed. This use of NSTableView is based on tutorial: http://www.youtube.com/watch?v=5teN5pMf-rs FinalImageBrowser is IBOutlet to NSTableView @implementation AppController NSMutableArray *listData; - (void)awakeFromNib { [FinalImageBrowser setDataSource:self]; } - (IBAction)StartReconstruction:(id)sender { NSMutableArray *ArrayOfFinals = [[NSMutableArray alloc] init]; //Array of list with final images NSString *FinalPicture; NSString *PicNum; int FromLine = [TextFieldFrom intValue]; //read number of start line int ToLine = [TextFieldTo intValue]; //read number of finish line int RecLine; for (RecLine = FromLine; RecLine < ToLine; RecLine++) //reconstruct from line to line { Start(RecLine); //start reconstruction //Create path of final image FinalPicture = @"FIN/final"; PicNum = [NSString stringWithFormat: @"%d", RecLine]; FinalPicture = [FinalPicture stringByAppendingString:PicNum]; FinalPicture = [FinalPicture stringByAppendingString:@".bmp"]; [ArrayOfFinals addObject:FinalPicture]; // add path to array } listData = [[NSMutableArray alloc] init]; [listData autorelease]; [listData addObjectsFromArray:ArrayOfFinals]; [FinalImageBrowser reloadData]; NSBeep(); //make some noise NSImage *fin = [[NSImage alloc] initWithContentsOfFile:FinalPicture]; [FinalImage setImage:fin]; } - (int)numberOfRowsInTableView:(NSTableView *)tv { return [listData count]; } - (id)tableView:(NSTableView *)tv objectValueFromTableColumn:(NSTableColumn *)tableColumn row:(int)row { return (NSString *)[listData objectAtIndex:row]; } @end when the StartReconstruction end the number of cols have changed right, but they're empty. When I debug app, items in listData is rigth. Thanks

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• Sort/Enumerate an NSArray from somewhere in the middle?

  - by Kenny Winker

  I have an NSArray, with objects ordered like so: a b c d e f I would like to enumerate through this array in this order: c d e f a b i.e. starting at some point that is not the beginning, but hitting all the items. I imagine this is a matter of sorting first and then enumerating the array, but I'm not sure if that's the best technique... or, frankly, how to sort the array like this. Edit Adding details: These will be relatively small arrays, varying from 3 to 10 objects. No concurrent access. I'd like to permanently alter the sort order of the array each time I do this operation.

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• how to use back button in Xib view which is loaded with tab bar controller

  - by riteshkumar1905

  Hello I have two Xib view, one which contain play list and another which play the song containing with tab bar controller. Now after the song was played when we go back to play the next song then it contain the previous view along with navigation bar. I have also tried the method "viewController=nil;".But I have get any result Thanks Ritesh

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• Binding value for NSTableView, but tooltip gets set as well

  - by Mark

  I've set up an NSTableView in Interface Builder to be populated from an NSArray. Each value of the array represents one row in the table. The value is bound correctly, but as a side effect, the table cell's tooltip is set to the string representation of the bound object. In my case, the NSArray contains NSDictiorany objects and the tooltip looks like it could be the [... description] output of that dictionary. Very ugly... I don't want the tooltip to be set at all. I have other tables that have plain NSString values bound to them and they don't have a tooltip set automatically. Is there some Interface Builder magic going on? I tried to start with a blank project - same problem. I should add that the table cell is a custom implementation of NSTextFieldCell that uses an NSButtonCell instance to draw an image and a label into the table. The values are retrieved from the dictionary bound as value. Why is the tooltip set when I only bind the "value" attribute? Thanks in advance!

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• Parsing NSXMLNode Attributes in Cocoa

  - by Jeffrey Kern

  Hello everyone, Given the following XML file: <?xml version="1.0" encoding="UTF-8"?> <application name="foo"> <movie name="tc" english="tce.swf" chinese="tcc.swf" a="1" b="10" c="20" /> <movie name="tl" english="tle.swf" chinese="tlc.swf" d="30" e="40" f="50" /> </application> How can I access the attributes ("english", "chinese", "name", "a", "b", etc.) and their associated values of the MOVIE nodes? I currently have in Cocoa the ability to traverse these nodes, but I'm at a loss at how I can access the data in the MOVIE NSXMLNodes. Is there a way I can dump all of the values from each NSXMLNode into a Hashtable and retrieve values that way? Am using NSXMLDocument and NSXMLNodes.

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• How to configure a OCUnit test bundle for a framework?

  - by GuidoMB

  I've been developing a Mac OS X framework and I want to use OCUnit in my XCode 3.2.1 project. I've followed several tutorials on how to configure a OCUnit test bundle. The problem is that when I create a test case that uses a function that is defined in one of the framework's sources, I get a building error telling me that the symbol is not found. I made the test bundle dependent of my project's target as the tutorial said, but that doesn't seem to be problem. First I thought that I could solve this problem by dragging the framework's source files into the compile sources section within the Test bundle target, but then all the symbols referenced from that source file started to show up in the build errors, so that seems to not be a good solution/idea. How can I configure my unit test bundle so it builds properly?

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• Multiple View application and Navigation Bar

  - by byronh

  Hi. I'm working in a iphone view-based application. The application works this way: First view is a welcome view with buttons for load other views. Second view is a map that shows the location using gps. Third view is a search engine that loads some information to show on the map and on a list (This has two button to load map or table). Fourth view is a table view that shows the results and then loads the detail on another view and load a web site on another view. My problem is with this view, because i don't know how can implement a navigation bar in this view that loads the detail and the web view. Thanks for your help. Byron H.

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• Passing NULL value

  - by FFXIII

  Hi. I use an instance of NSXMLParser. I store found chars in NSMutableStrings that are stored in an NSMutableDictionary and these Dicts are then added to an NSMutableArray. When I test this everything seems normal: I count 1 array, x dictionnaries and x strings. In a detailview controller file I want to show my parsed results. I call the class where everthing is stored but I get (null) returned. This is what I do (wrong): XMLParser.h @interface XMLParser : NSObject { NSMutableArray *array; NSMUtableDictionary *dictionary; NSSMutabletring *element; } @property (nonatomic, retain) NSMutableArray *array; @property (nonatomic, retain) NSMutableDictionary *dictionary; @property (nonatomic, retain) NSMutableString *element; XMLParser.m @synthesize array, dictionary, element; //parsing goes on here & works fine //so 'element' is filled with content and stored in a dict in an array //and released at the end of the file In my controller file I do this: controller.h @class XMLParser; @interface controller : UIViewController { XMLParser *aXMLParser; } @property (nonatomic, retain) XMLParser *aXMLParser; controller.m #import "XMLParser.h" @synthesize aXMLParser; - (void)viewDidLoad { NSLog(@"test array: %@", aXMLParser.array); NSLog(@"test dict: %@", aXMLParser.dictionary); NSLog(@"test element: %@", aXMLParser.element); } When I test the value of my array, a dict or an element in the XMLParser.h file I get my result. What am I doing wrong so I can't call my results in my controller file? Any help is welcome, because I'm pretty stuck right now :/

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• Error "Create a concrete instance!"

  - by dododedodonl

  Hey All, I've got another problem in the same code... I'm getting this error: *** initialization method -initWithFormat:locale:arguments: cannot be sent to an abstract object of class NSString_RegEx: Create a concrete instance! But I don't understand the error or what I should do...

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• How to call another class's method from my app delegate

  - by Jared

  I have an application that utilizes UILocalNotifications to pop-up UIAlertViews. When the notification fires, the user chooses to go into the app, and this method is called from my app delegate: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {...} Where I can handle it and where I also prompt another alertview for more information. So when the app launches, it is displaying view A, and then the alertview pops up and prompts for input. This alertview, however, is originating from my app delegate. I need to be able to reload view A when the user hits Yes/No on the alertview. How can I do that from within my app delegate? Any help is appreciated!!

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• UIPageViewController: How to refer the UIPicker selected Value from 1 Viewcontroller to another...

  - by Abhinav

  I am referring the code from here, please have look at the code while answering my question : http://www.ioslearner.com/wp-content/uploads/2011/12/UIPageViewControllerDemo.zip important notes and few changes: I basically have a viewcontroller and contentviewcontroller . ViewController - have following UIPAgeViewController Datasource and Deligate UIPickerView - upon next and previous page turn the value in the PickerView changes contentviewcontroller - has following UIWebview - defined in Viewdidload of contentviewcontroller which dynamically fetches a html page based upon the string value (LabelContents) sent through following method -(UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController is there a way to populate the UIWebview in contentviewcontroller based upon the row selected in UIPickerView ? Kindly help.

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