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• query about xml parsing

  - by shishir.bobby

  hi all ,i just want to knw,is there any boundations in xml parsing with characters like can we parse a word containing some characters like "frühe" containing "ü" "böser" containing "ö" while i am parsing my xml,which is few different languages, some characters are like the above. and wen i saw in console, it get interpted,exaactly wen it reacher "ü" becoz at console it prints "fr" so can someone provide me some ideas about this thing regards shishir

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• iphone encryption not working

  - by Futur

  I have this encryption/decryption implemented and executes with no error, but i am unable to decrypt the data and im not sure whether the data is encrypted, kindly help. - (NSData *)AES256EncryptWithKey:(NSString *)key { char keyPtr[kCCKeySizeAES256+1]; bzero(keyPtr, sizeof(keyPtr)); [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding]; NSUInteger dataLength = [strData length]; data = [[NSData alloc] init]; data = [strData dataUsingEncoding:NSUTF8StringEncoding]; size_t bufferSize = dataLength + kCCBlockSizeAES128; void *pribuffer = malloc(bufferSize); size_t numBytesEncrypted = 0; CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding, keyPtr, kCCKeySizeAES256, NULL /* initialization vector (optional) */, [data bytes], dataLength, /* input */ [data bytes], bufferSize, /* output */ &numBytesEncrypted); if (cryptStatus == kCCSuccess) { return [NSData dataWithBytesNoCopy:data length:numBytesEncrypted]; }} The decryption is : -(NSData *)AES256DecryptWithKey:(NSString *)key andForData:(NSData *)objDataObject { char keyPtr[kCCKeySizeAES256+1]; bzero(keyPtr, sizeof(keyPtr)); [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding]; NSUInteger dataLength = [objDataObject length]; size_t bufferSize = dataLength + kCCBlockSizeAES128; void *buffer = malloc(bufferSize); size_t numBytesDecrypted = 0; CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding, keyPtr, kCCKeySizeAES256, NULL, [objDataObject bytes], dataLength, [objDataObject bytes], bufferSize, &numBytesDecrypted); if (cryptStatus == kCCSuccess) { return [NSData dataWithBytesNoCopy:objDataObject length:numBytesDecrypted]; } } i call the above methods like this: CryptoClass *obj = [CryptoClass new]; NSData *objData = [obj AES256EncryptWithKey:@"hell"]; NSData *val = [obj AES256DecryptWithKey:@"hell" andForData:objData ]; NSLog(@"decrypted string is : %@ AND LENGTH IS %d",[val description],[val length]); Decryption doesnt seem to happen at all and the encryption - i am not sure about it, kindly help me here.

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• Why is my app running

  - by John Smith

  I have compiled my iPhone app with setting (Device, Release). I install it on the test machine and it runs with no problem. Here's the problem. The app is linked to a C++ library. The compilation on the simulator has no errors. However the device compilation produces 568 errors, mostly about different visibilities w.r.t AppDelegate.o. They all look like: QL::Error::~Error()has different visibility (default) in /QL/build/Release-iphoneos/libQLLibrary.a(abcd.o) and (hidden) in /Programming/ObjC/Second/build/Second.build/Release-iphoneos/FG.build/Objects-normal/armv6/AppDelegate.o Why is this, and how can I stop the errors anyway?

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• EXC_BAD_ACCESS signal received

  - by Hector Ramos

  When deploying the application to the device, the program will quit after a few cycles with the following error: Program received signal: "EXC_BAD_ACCESS". The program runs without any issue on the iPhone simulator, it will also debug and run as long as I step through the instructions one at a time. As soon as I let it run again, I will hit the EXC_BAD_ACCESS signal. In this particular case, it happened to be an error in the accelerometer code. It would not execute within the simulator, which is why it did not throw any errors. However, it would execute once deployed to the device. Most of the answers to this question deal with the general EXC_BAD_ACCESS error, so I will leave this open as a catch-all for the dreaded Bad Access error. EXC_BAD_ACCESS is typically thrown as the result of an illegal memory access. You can find more information in the answers below. Have you encountered the EXC_BAD_ACCESS signal before, and how did you deal with it?

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• UIImages on UITableView?

  - by babu Kong

  what is the best method to display about 300 png images into a UITableView.. i dont wanna display them at the same time... i have 3 tableViewControllers that will each display about 100 imgaes.. (its for a catalog so the images are important to display) i used [uiimage imageNamed:] but that method caches the images and they dont get released so the memory usage is big.... is there any way to release the cache when the nav controller pushes a different view controller? i also tried [uiimage alloc] initWithContentsOfFile] but the images wont display.... any help?

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• Compile error when trying to _debug_ a Visual Stuio integration project

  - by Rune FS

  I'm currently working on a Visual Studio integration project for VS2010 (a custom highlighter) I'm using Irony and the LanguageServiceTemplate from this Code project article. However that template is build for 2008 and the changes made in VS2010 when it comes to integrating breaks the template. When I try to compile I get the following error: Source.extension.vsixmanifest file not found in project. If a file with this name is present in the project, make sure the build action is set to "None". Any ides of what I can do to fix it?

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• How to add Timer to loop.

  - by mukeshpawar

  how to add timer to loop. i am making a urlConnection so i want that the loop execute for a time and if there is no connection it should exit. Does it work..... [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate dateWithTimeIntervalSinceNow:0.1f]]; Thanks in advance.

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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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• Can MFMailComposeViewController attach an XML doc to an HTML message?

  - by Luther Baker

  I am creating an email in MFMaiilComposeViewController and if I simply create some html snippets and assign them to the message body - all is well. The resulting email (in GMail and Yahoo) looks like the original HTML I sent. [mailMan_ setMessageBody:body isHTML:YES]; On the other hand, if I also include an XML attachment, my email reader renders everything as plain text … including, the XML inlined. IE: my mail client (GMail, Yahoo) shows the raw HTHML and XML tags - including html tags that I didn't supply - ie: the html, head, body tags the iPhone provides around the content: NSData *opmlData = [[NSData alloc] initWithData:[opml dataUsingEncoding:NSUTF8StringEncoding]]; NSString *fileName = [NSString stringWithFormat:@"%f.opml", [NSDate timeIntervalSinceReferenceDate]]; [mailMan_ addAttachmentData:opmlData mimeType:@"text/xml" fileName:fileName]; I pop3'd the mails to see what was happening and found that WITHOUT an attachment, the resulting html section of the email contains this block: --0-1682099714-1273329398=:59784 Content-Type: text/html; charset=us-ascii <html><body bgcolor="#FFFFFF"><div><h2 style="b while on the other hand, WITH the XML attachment, the iPhone is sending this: --0-881105825-1273328091=:50337 Content-Type: text/plain; charset=us-ascii <html><body bgcolor="#FFFFFF"><div><h2 style="bac Notice the difference? Look at the Content-Type … text/html vs text/plain. It looks like when I include an XML attachment, the iPhone is errantly tagging the HTML version of the body as plain text! Just to clarify, technically, both with and without the attachment, the iPhone also includes this: --0-881105825-1273328091=:50337 Content-Type: text/plain; charset=us-ascii Notebook Carpentry Bathroom floor tile Bathroom wall tile Scrape thinset But this obviously isn't where the problem lies. Am I doing something wrong? What must I do to actually "attach" XML without the iPhone labeling the entire HTML body as plain text. I tried reversing the assignments (attachment first and then body) but no luck. For what it's worth, the email looks perfect from the iPhone's sending interface. Indeed, the HTML renders correctly and the attachment looks like a little icon at the bottom of the message. This problem has more to do with what the iPhone is actually sending.

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• iPhone UITableView trigger a parent method?

  - by MidnightLightning

  Okay, so I'm working on an iPhone app with a preferences-esque section where there's a base TableView, which has one section, and several rows of customized cells to hold a name and a value label. Clicking on a row brings up another View, which allows the user to pick from a list (another TableView), and select an item. All of these TableViews are done programatically. The base TableView has a property that holds a Controller instance for each of the "pick from the list" Views. Each of the "pick from the list" views has a property called chosenValue that has the currently-selected option. I've gotten the UI to handle the didSelectRowAtIndexPath to update the chosenValue property and then "pop" the view (going back to the main TableView). But, even though the main TableView's cellForRowAtIndexPath method references the chosenValue property of the subview that's held in a property, the view doesn't update when an item is selected. In short, how can the sub-view trigger a reloadData on the parent object, after it "pops" and unloads?

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• iphone app with role based login?

  - by chaitanya

  Can iPhone apps have role based login? In my application I have to display the content according to the role of the user (employee, visitor). Till now I havent seen any app with role based login for iphone. Can I develop role based login? is there any restriction from apple side for these kind of logins to approve the app?

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• How do I access variable values from one view controller in another?

  - by Thomas

  Hello all, I have an integer variable (time) in one view controller whose value I need in another view controller. Here's the code: MediaMeterViewController // TRP - On Touch Down event, start the timer -(IBAction) startTimer { time = 0; // TRP - Start a timer timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(updateTimer) userInfo:nil repeats:YES]; [timer retain]; // TRP - Retain timer so it is not accidentally deallocated } // TRP - Method to update the timer display -(void)updateTimer { time++; // NSLog(@"Seconds: %i ", time); if (NUM_SECONDS == time) [timer invalidate]; } // TRP - On Touch Up Inside event, stop the timer, decide stress level, display results -(IBAction) btn_MediaMeterResults { [timer invalidate]; NSLog(@"Seconds: %i ", time); ResultsViewController *resultsView = [[ResultsViewController alloc] initWithNibName:@"ResultsViewController" bundle:nil]; [self.view addSubview:resultsView.view]; } And in ResultsViewController, I want to process time based on its value ResultsViewController - (void)viewDidLoad { if(time < 3) {// Do something} else if ((time > 3) && (time < 6)) {// Do something else} //etc... [super viewDidLoad]; } I'm kind of unclear on when @property and @synthesize is necessary. Is that the case in this situation? Any help would be greatly appreciated. Thanks! Thomas

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• ListAdapter to modify the datasource (which is an arraylist)

  - by dusker

  Hi Everyone, here's a problem that i've run into lately: I have a listview with a custom adapter class, the adapter takes in a listview and populates the listview with elements from it. Now, i'd like to have a button on each row of a listview to remove the item from it. How should i approach this problem? Is there a way to remotely trigger a method in the activity class and call notifydatachanged() method on the adapter to refresh the listview? thanks in advance for your help and some code snippets if possible best regards peter

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• UIKeyboard turn Caps Lock on

  - by Daniel Granger

  I need my user to input some data like DF-DJSL so I put this in the code: theTextField.autocapitalizationType = UITextAutocapitalizationTypeAllCharacters; But unfortunately what happens is the first to letter type in CAPS but then letter immediately after typing the hyphen will be in lower case and then the rest return to CAPS therefore producing output like this (unless the user manually taps the shift button after typing a hyphen): DF-dJSL How can I fix this? Many Thanks

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• webViewDidFinishLoad exception

  - by Nava Carmon

  Hi, I have a screen with a webView in my navigation controller stack and when I navigate from this view back to a previous before the page completely loaded I get a EXCEPTION_BAD_ACCESS. Seems, that the view with a webView being released before it comes to webViewDidFinishLoad function. My question is how to overcome this problem? I don't expect from the user to wait till the page loads... The code is very simple: - (void) viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; NSURL *url = [NSURL URLWithString:storeUrl]; //URL Requst Object NSURLRequest *requestObj = [NSURLRequest requestWithURL:url]; //Load the request in the UIWebView. [browser loadRequest:requestObj]; } TIA

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• sqlite3 no insert is done after --> insert into --> SQLITE_DONE

  - by Fra

  Hi all, I'm trying to insert some data in a table using sqlite3 on an iphone... All the error codes I get from the various steps indicate that the operation should have been successful, but in fact, the table remains empty...I think I'm missing something... here the code: sqlite3 *database = nil; NSString *dbPath = [[[ NSBundle mainBundle ] resourcePath ] stringByAppendingPathComponent:@"placemarks.sql"]; if(sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK){ sqlite3_stmt *insert_statement = nil; //where int pk, varchar name,varchar description, blob picture static char *sql = "INSERT INTO placemarks (pk, name, description, picture) VALUES(99,'nnnooooo','dddooooo', '');"; if (sqlite3_prepare_v2(database, sql, -1, &insert_statement, NULL) != SQLITE_OK) { NSAssert1(0, @"Error: failed to prepare statement with message '%s'.", sqlite3_errmsg(database)); } int success = sqlite3_step(insert_statement); int finalized = sqlite3_finalize(insert_statement); NSLog(@"success: %i finalized: %i",success, finalized); NSAssert1(101, @"Error: failed to insert into the database with message '%s'.", sqlite3_errmsg(database)); sqlit3_step returns 101, so SQLITE_DONE, which should be ok.. If I execute the sql statement in the command line it works properly... anyone has an idea? could it be that there's a problem in writing the placemarks.sql because it's in the resources folder? rgds Fra

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• Asynchronous Image loading in certain custom UITableViewCells

  - by Dan

  So, I'm sure that this issue has been brought up before, but I haven't quite seen a solution for my specific problem. What I'm doing is loading a group of custom UITableViewCell's that are drawn using Loren Brichter's solution, each cell has some content, an icon (representing the user) that is asynchronously loaded into it, and a few other things. Eventually, I'm hoping to add support for images. Not every cell has an image, so in the creation of the cell, it determines if an image is required to be loaded and drawn into the cell. My problem is that I don't know how I can do that while keeping the image loaded asynchronously - with not every cell having the need to load an image (like needed with the icon) I'm not sure how to keep it in order when an cell is thrown off screen and re-rendered when the user scrolls over it. Each cell draws it content from an NSArray containing a custom object called FeedItem. All I'm really looking for is some sort of solution or idea to help me because right now I am at a loss. Thanks guys, I will appreciate the help.

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• replicate ibooks app

  - by Sam

  what api/framework would i need to use? opengl es? quartz2d?

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• Resize a UITableView to accomodate a translucent header before it becomes visible

  - by scotru

  I have a UITableView inside a UINavigationController. The navigation controller uses a translucent navigation bar--as a result, my table view is displayed behind the navigation bar and it's height includes the height of the navigation bar. However, I want the table view to appear below the navigation bar (as it would if it were not translucent). I'm working in MonoTouch, but I think the principles are language independent. Here's the code I'm using to resize the UITableView frame: RectangleF rect = tableView.Frame; tableView.Frame = new RectangleF (rect.Left, rect.Top + 44, rect.Width, rect.Height - 44); tableView.ContentInset = new UIEdgeInsets (0, 0, 0, 0); This works fine if I place it in the viewDidAppear method, but will not work in the viewWillAppear method. In the viewDidAppear method, however I can see the resize occurring briefly in the form of a flicker. I want to do the resize before the frame appears. But if I put this code in viewWillAppear or viewDidLoad, it has no effect. Thanks in advance for any help!

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• What is a good way to animate UIViews inside UITableViewCell after a callback?

  - by erotsppa

  We couldn't find a way to animate UIViews inside a UITableCell as an action from a callback. Suppose in a scenario where you click on a button on the UITableViewCell and it fires off an asynchronous action to download a picture. Suppose further that when the picture is downloaded we want a UIView in the cell to animate the picture to give user a visual feedback that something new is about to be presented. We couldn't find a way to track down the UIVIew to invoke beginAnimation on because the original cell that the user clicked on might now be used for another row due to the nature of cells being reused when you scroll up and down in the table. In other words we can't keep a pointer to that UITableViewCell. We need to find another way to target the cell and animate it if that row is visible and don't animate if the row is scrolled out of range.

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• Objective C: Create arrays from first array based on value

  - by Nic Hubbard

  I have an array of strings that are comma separated such as: Steve Jobs,12,CA Fake Name,21,CA Test Name,22,CA Bill Gates,44,WA Bill Nye,21,OR I have those values in an NSScanner object so that I can loop through the values and get each comma seperated value using objectAtIndex. So, what I would like to do, is group the array items into new arrays, based on a value, in this case, State. So, from those, I need to loop through, checking which state they are in, and push those into a new array, one array per state. CA Array: Steve Jobs,12,CA Fake Name,21,CA Test Name,22,CA WA Array: Bill Gates,44,WA OR Array: Bill Nye,21,OR So in the end, I would have 3 new arrays, one for each state. Also, if there were additional states used in the first array, those should have new arrays created also. Any help would be appreciated!

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• How to generate Objective C class files from XML schema?

  - by Anthony D

  I have an XML schema that defines my data model. I would now like to have Objective C source files generated from the XML schema. Does anyone know how to accomplish this?

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• How does overlayViewTouched notification work in the MoviePlayer sample code

  - by Jonathan

  Hi, I have a question regarding the MoviePlayer sample code provided by apple. I don't understand how the overlayViewTouch notification works. The NSlog message I added to it does not get sent when I touch the view (not button). // post the "overlayViewTouch" notification and will send // the overlayViewTouches: message - (void)overlayViewTouches:(NSNotification *)notification { NSLog(@"overlay view touched"); // Handle touches to the overlay view (MyOverlayView) here... } I can, however, get the NSlog notification if I place it in -(void)touchesBegan in "MyOverlayView.m". Which makes me think it is recognizing touches but not sending a notification. // Handle any touches to the overlay view - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch* touch = [touches anyObject]; if (touch.phase == UITouchPhaseBegan) { NSLog(@"overlay touched(from touchesBegan") // IMPORTANT: // Touches to the overlay view are being handled using // two different techniques as described here: // // 1. Touches to the overlay view (not in the button) // // On touches to the view we will post a notification // "overlayViewTouch". MyMovieViewController is registered // as an observer for this notification, and the // overlayViewTouches: method in MyMovieViewController // will be called. // // 2. Touches to the button // // Touches to the button in this same view will // trigger the MyMovieViewController overlayViewButtonPress: // action method instead. NSNotificationCenter *nc = [NSNotificationCenter defaultCenter]; [nc postNotificationName:OverlayViewTouchNotification object:nil]; } } Can anyone shed light on what I am missing or doing wrong? Thank you.

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• how to download update from iphone app to sqlite database

  - by user301212

  hi i use sqlite database on my iphone app and i need to update this database from the internet from my server how i can download the new database and delete the old database and recopy the new database to document directory

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• How can I pop a view from a UINavigationController and replace it with another in one operation?

  - by Matt Brandt

  I have an application where I need to remove one view from the stack of a UINavigationController and replace it with another. The situation is that the first view creates an editable item and then replaces itself with an editor for the item. When I do the obvious solution within the first view: MyEditViewController *mevc = [[MYEditViewController alloc] initWithGizmo: gizmo]; [self retain]; [self.navigationController popViewControllerAnimated: NO]; [self.navigationController pushViewController: mevc animated: YES]; [self release]; I get very strange behavior. Usually the editor view will appear, but if I try to use the back button on the nav bar I get extra screens, some blank, and some just screwed up. The title becomes random too. It is like the nav stack is completely hosed. What would be a better approach to this problem? Thanks, Matt

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