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  • How to "reset" subviews of scrollview for new items?

    - by Tom Tallak Solbu
    I have a MasterViewController displaying Items. Selecting an Item (ItemA), displays images of ItemA in a DetailViewController. The DeatilViewController contains a scrollView, displaying all the images. When tableView:didSelectRowAtIndexPath is called, the images is added to an UIImageView, that is tagged and added as a subview to a scrollview. NSUInteger i; for (i = 1; i <= numberOfImages; i++) { NSString *imageName = [ItemAImages objectAtIndex:i-1]; UIImage *image = [UIImage imageNamed:imageName]; UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; imageView.tag = i; [scrollView addSubview:imageView]; } Works fine. But when I go back to the MasterViewController, and selects a ItemB, the ItemA is still displayed, like the iPhone simulator refuses to forget the previous scrollview,containing ItemA images. I have tried [subview removeFromSuperview]; which results in either no scrollview at all, or no effect. Depending on when this method is called. How can I "reset" the scrollview for the next Item?

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  • Getting JSON object from php authentication objective c

    - by iError
    I am trying to authenticate using the below code NSString *urlAsString =[NSString stringWithFormat:@"http://www.myurl.com/abc/authenticate.php"]; NSURL *url = [NSURL URLWithString:urlAsString]; NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url]; [urlRequest setTimeoutInterval:30.0f]; [urlRequest setHTTPMethod:@"POST"]; [urlRequest addValue:@"test" forHTTPHeaderField:@"m_username" ]; [urlRequest addValue:@"123" forHTTPHeaderField:@"m_password" ]; [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self]; NSOperationQueue *queue = [[NSOperationQueue alloc] init]; [NSURLConnection sendAsynchronousRequest:urlRequest queue:queue completionHandler:^(NSURLResponse *response,NSData *data, NSError *error) { if ([data length] >0 && error == nil){ html = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; NSLog(@"HTML = %@", html); receivedData = [NSMutableData data]; } else if ([data length] == 0 && error == nil){ NSLog(@"Nothing was downloaded."); } else if (error != nil){ NSLog(@"Error happened = %@", error); } }]; // Start loading data NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self]; if (theConnection) { // Create the NSMutableData to hold the received data receivedData = [NSMutableData data]; } else { // Inform the user the connection failed. } My username password is correct, I think I am not making the proper call thats why I dont get the desired results and the web service is receiving the null parameters. What can be the issue? Any help appreciated.

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  • How to load a table view when coming to back with out selection index

    - by ratnasomu
    Hellow all, I am using navigation controller and have table views inside views. when i select any cell it it will navigate to another view. so,from there if i click back button it come sto previous view.But,it showing the cell which is selected previously. I dnt want this .it should not show which cell we selected previously. Could any one help me how to get this. Thanks.

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  • NavigationController does not set view properties correctly when pushed

    - by Sheehan Alam
    I have a UITabBarControllerDelegate that pushes a new view controller when a certain tab is pressed: - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { MyView* myView = [[[MyView alloc] initWithNibName:@"MyView" bundle:nil]autorelease]; if([self.tabBarController.selectedViewController.title isEqualToString:@"Friends"]){ NSLog(@"Clicked Friends"); myView.reloadFriends = TRUE; [self.navigationController myView animated:YES]; } } However, if I change my code to set the tabbar's selected view controller to myView everything works, but I don't get my navigation bar: if([self.tabBarController.selectedViewController.title isEqualToString:@"Friends"]){ NSLog(@"Clicked Friends"); myView.reloadFriends = TRUE; self.tabBarController.selectedViewController = myView; } How can I set the reloadFriends property in MyView and have the navigation bar at the top?

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  • rendering a new line in a string (\n) with drawRect

    - by Mrwolfy
    I am trying to render a string with a new line (line break \n), using drawRect. The code below renders the my string as a single line, with no line break, even though I am using the \n character. See the second to last line. UIFont *font = [UIFont fontWithName:@"HelveticaNeue-CondensedBlack" size:fontSize]; CGPoint point = CGPointMake(0,0); CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetRGBFillColor(context, 1.0, 1.0, 1.0, 1.0); CGContextSetRGBStrokeColor(context, 0.0, 0.0, 0.0, 1.0); CGContextSetLineWidth(context, 4.0); CGContextSetTextDrawingMode(context, kCGTextFillStroke); CGContextSaveGState(context); [@"test \n test" drawAtPoint:point withFont:font]; CGContextRestoreGState(context);

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  • Vertically align UILabel

    - by Ashish Agarwal
    I am trying to vertically align the text in the UILabel view of my app. The problem is that I want the text to be vertically aligned to the top and the size of the label to be 280 x 150. I am only able to achieve one of these 2 things. If I remove the line [myLabel sizeToFit]; then the alignment of the text is alright but the size is messed up. But if I add the above line, then the alignment is messed up but the size is alright. How do I fix this problem. I've added the code below - CGRect labelFrame = CGRectMake(22, 50, 280, 150); UILabel *myLabel = [[UILabel alloc] initWithFrame:labelFrame]; [myLabel setText:finalRecipe]; [myLabel setBackgroundColor: [UIColor lightGrayColor]]; [myLabel setNumberOfLines:0]; [myLabel sizeToFit]; [self.view addSubview:myLabel];

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  • How to play audio file ios

    - by Camus
    I am trying to play an audio file but I can get it working. I imported the AVFoundation framework. Here is the code: NSString *fileName = [[NSBundle mainBundle] pathForResource:@"Alarm" ofType:@"caf"]; NSURL *url = [[NSURL alloc] initFileURLWithPath:fileName]; NSLog(@"Test: %@ ", url); AVAudioPlayer *audioFile = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:NULL]; audioFile.delegate = self; audioFile.volume = 1; [audioFile play]; I am receiving an error nil string parameter I copied the file to the supporting files folder so the file is there. Can you guys help me? Thanks

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  • setBackButtonBackgroundImage without title IOS5

    - by user1736571
    I'm trying to get a back button without a title but I can't make it work. I am really new in objective-c... UIImage *backButtonImage = [[UIImage imageNamed:@"back.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 30, 50)]; [[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonImage forState:UIControlStateNormal barMetrics:UIBarMetricsDefault]; With that code I have my back button but also the title of the previous page. I found some working examples using the class UIViewController but in my case the code is in the appDelegate.m file. Any idea how I can make it work ?

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  • For the iPad or iPhone, how do you control the system Volume? For example, have a button that mutes

    - by SolidSnake4444
    I would like to make a button in my iPad app (probably will be similar to iPhone apps) that when I push this button, all audio is muted, even when you exit the app. I don't see anyway that you can control the volume, although I'm sure other apps have that I have seen in the app store for the iPhone. I also read some places that doing this would reject you from the app store. How could I go about lowering, or highering the volume of the iPad from an app that works even when the app closes? Thank you!

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  • Converting image to Black & White image on iPhone SDK issues.

    - by KfirS
    Hello, I've used a familiar code to convert image to Black & White which I've founded on several forums. The code is: CGColorSpaceRef colorSapce = CGColorSpaceCreateDeviceGray(); CGContextRef context = CGBitmapContextCreate(nil, originalImage.size.width, originalImage.size.height, 8, originalImage.size.width, colorSapce, kCGImageAlphaNone); CGContextSetInterpolationQuality(context, kCGInterpolationHigh); CGContextSetShouldAntialias(context, NO); CGContextDrawImage(context, CGRectMake(0, 0, originalImage.size.width, originalImage.size.height), [originalImage CGImage]); CGImageRef bwImage = CGBitmapContextCreateImage(context); CGContextRelease(context); CGColorSpaceRelease(colorSapce); UIImage *resultImage = [UIImage imageWithCGImage:bwImage]; // This is result B/W image. CGImageRelease(bwImage); return resultImage; When I'm using this code with on Horizontal image it's work fine, but when I'm trying a to use this code on Vertical image, the result is disproportionate image and rotate 90 degree left. Can anyone know what could be the problem? Thanks, Kfir.

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  • Searching NSString in XML database, Iphone

    - by user358170
    My project is like a classifieds kind of stuff.. I have a search text box in the first page. When the user enters some text in that, i need to compare that text to the XML file from where all the data are being recieved, and should list out all the advertisements in the Table View (next page).. I had did this kind of search in sql database..but not with XML.. Just need some help..

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  • iPhone Tab Bar application crash

    - by Mark Szymanski
    I have an application that uses a tab bar and whenever it launches it crashes and gives me the following error and stack trace: 2010-04-22 16:15:03.390 iCrushCans[59858:207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIWindow 0x3e051a0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key rootViewController.' 2010-04-22 16:15:03.392 iCrushCans[59858:207] Stack: ( 29680731, 2425423113, 29839809, 305768, 304309, 2957847, 4641908, 29583663, 4636459, 4644727, 2805842, 2844630, 2833204, 2815615, 2842721, 37776729, 29465472, 29461576, 2809365, 2846639 ) Thanks in advance!

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  • Two view App with root template view

    - by Tieman
    Hi I was wanted to do Application witch have a root template view with a nice logo on top or something adn load other views just below (here is what I have right now: Test App ) But I have a little problem. If I'll remove a comment in file TestAppDelegate.m on line 58 //[currentView release]; Application will crash with bunch of errors when I try to switch views. But if I comment this line Project analyzer is telling me that I have a potential leak with currentView variable. Can somebody spare some time and see in that code what I did wrong?

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  • iOS get file size on disk

    - by F2_CMD
    I'm trying to get the size on disk of a file in iOS using Objective C. As of now I've been able to get the actual size of the file and other file information using NSFileManager and then getting the attributes attributesOfItemAtPath:error but not the size on disk. I also tried getting the file size from struct stat but again it doesn't give me size on disk.I tried using NSTask to make a call to du -h but iOS didn't allow me to fork other processes. Any ideas are welcome :) I know this questions is similar to many others but the difference is that I'm trying to do this in iOS and most of the methods used in other systems don't work here. Thanks

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  • How can I search for a string in a .txt file for NSScanner?

    - by pixelbitapps
    I currently have the following code to get a certain piece of code from the UIWebView: NSURL *requestTimetableURL = [NSURL URLWithString:@"http://www.dhsb.org/index.phtml?d=201435"]; NSLog(@"Loaded Timetable"); NSError *error; NSString *page = [NSString stringWithContentsOfURL:requestTimetableURL encoding:NSASCIIStringEncoding error:&error]; [webView loadHTMLString:page baseURL:requestTimetableURL]; NSString* Period1; NSScanner *htmlScanner = [NSScanner scannerWithString:page]; [htmlScanner scanUpToString:@"<P align=center><STRONG><FONT color=#c00000>" intoString:NULL]; [htmlScanner scanString:@"<P align=center><STRONG><FONT color=#c00000>" intoString:NULL]; [htmlScanner scanUpToString:@"</FONT>" intoString:&Period1]; How can I scan a .txt file (which contains the string like above) for the code? E.G. [htmlScanner scanUpToString:teststring intoString:NULL]; Thanks!

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  • Added a tableview in a viewcontroller. How do I load tableview cells

    - by user1509593
    I have a view controller In storyboard, added tableview to view controller. Created an IBOutlet for tableview to View controller's header file. The view controller's header file includes an resultsarray Changed the @interface to include delegates <\UITableViewDelegate, UITableViewDataSource View controller implementation file has mandatory tableview protocols (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath The view controller has search button in storyboard and IBAction in view controller header file. On click of search button, results are obtained. How do I load the array and redisplay tableview with results in search method. After I loaded the results in array, I tried [self viewdidload];, hoping the cells will be loaded. But didn't. I thought of calling [self.detailView cellForRowAtIndexPath:?indexpath], but dontknow what the value of index path is. Appreciate help from guru's to load the UItableviewcell Thanks

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  • How to access objects of app Delegate into RootViewController

    - by Ashutosh
    I have a navigation based app in which i am calling a web service. I have done all the work which is required in the background to absorb the web services. The only thing left is to display it in a Table view. The data i want to display is stored in a Mutable array and i can see the data in console and this is in app delegate. I just want to pass this data somehow to root so that i can display it in table view. Could somebody help me with this.

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  • How can I display the camera view in the main window in real time?

    - by Mongrel Warfare
    I'm trying to make an augmented reality application with a waypoint structure, like Yelp, and I'm wondering how to set up my main view so that it displays the camera view on the whole screen. I've heard of using the UIImagePickerController Class, but I'm unsure how to manipulate the code so that it doesn't actually take a picture, but just stays in the view mode. Any help would be appreciated, thanks!

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  • TouchXML to read in twitter feed for iphone app

    - by Fiona
    Hello there, So I've managed to get the feed from twitter and am attempting to parse it... I only require the following fields from the feed: name, description, time_zone and created_at I am successfully pulling out name and description.. however time_zone and created_at always are nil... The following is the code... Anyone see why this might not be working? -(void) friends_timeline_callback:(NSData *)data{ NSString *string = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]; NSLog(@"Data from twitter: %@", string); NSMutableArray *res = [[NSMutableArray alloc] init]; CXMLDocument *doc = [[[CXMLDocument alloc] initWithData:data options:0 error:nil] autorelease]; NSArray *nodes = nil; //! searching for item nodes nodes = [doc nodesForXPath:@"/statuses/status/user" error:nil]; for (CXMLElement *node in nodes) { int counter; Contact *contact = [[Contact alloc] init]; for (counter = 0; counter < [node childCount]; counter++) { //pulling out name and description only for the minute!!! if ([[[node childAtIndex:counter] name] isEqual:@"name"]){ contact.name = [[node childAtIndex:counter] stringValue]; }else if ([[[node childAtIndex:counter] name] isEqual:@"description"]) { // common procedure: dictionary with keys/values from XML node if ([[node childAtIndex:counter] stringValue] == NULL){ contact.nextAction = @"No description"; }else{ contact.nextAction = [[node childAtIndex:counter] stringValue]; } }else if ([[[node childAtIndex:counter] name] isEqual:@"created_at"]){ contact.date == [[node childAtIndex:counter] stringValue]; }else if([[[node childAtIndex:counter] name] isEqual:@"time_zone"]){ contact.status == [[node childAtIndex:counter] stringValue]; [res addObject:contact]; [contact release]; } } } self.contactsArray = res; [res release]; [self.tableView reloadData]; } Thanks in advance for your help!! Fiona

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  • Restore and preserve UIViewController pushed from UINavigationController, no storyboard

    - by user2908112
    I try to restore a simple UIViewController that I pushed from my initial view controller. The first one is preserved, but the second one just disappear when relaunched. I don't use storyboard. I implement the protocol in every view controller and add the restorationIdentifier and restorationClass to each one of them. The second viewController inherit from a third viewController and is initialized from a xib file. I'm not sure if I need to implement the UIViewControllerRestoration to this third since I don't use it directly. My code looks like typically like this: - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization self.restorationIdentifier = @"EditNotificationViewController"; self.restorationClass = [self class]; } return self; } -(void)encodeRestorableStateWithCoder:(NSCoder *)coder { } -(void)decodeRestorableStateWithCoder:(NSCoder *)coder { } +(UIViewController *)viewControllerWithRestorationIdentifierPath:(NSArray *)identifierComponents coder:(NSCoder *)coder { EditNotificationViewController* envc = [[EditNotificationViewController alloc] initWithNibName:@"SearchFormViewController" bundle:nil]; return envc; } Should perhaps the navigationController be subclassed so it too can inherit from UIViewControllerRestoration?

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  • Passing UITableView's with parsing XML

    - by Luai Kalkatawi
    I am parsing XML and I select from the UITablevView but I have an issue that how I am going to change the link on each selection? For example; www.example.com/test12.php?d=0 www.example.com/test12.php?d=1&il=istanbul www.example.com/test12.php?d=2&il=istanbul&ilce=kadikoy How can I change the d= and il= and ilce= value on each select on the UITableView? I have write this but couldn't go further. -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath]; NSString *cellText = selectedCell.textLabel.text; NSString *linkID = @"http://example/test12.php?d=@%&il=@%"; NSLog(@"%@ Selected", cellText); } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; containerObject = [objectCollection objectAtIndex:indexPath.row]; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } // Set up the cell... cell.textLabel.text = containerObject.city; return cell; } Thanks from now.

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  • Get the Value of Array that contains A String in Objective-C

    - by jaytrixz
    How can I get the value of an array that has one value which is a string in Objective-C? I'm actually getting confused on how to properly get the string value inside the array I'm accessing. I'm getting the value of an array named "sMessage" that has one value of type NSString "success". This is the response from the API: ({"sMessage":"success"}) I'm trying to get the value by using this code and logs it to the console: NSArray *resultsArray = [json objectForKey:@"sMessage"]; NSString *loginResult = [[resultsArray valueForKey:@"sMessage"] lastObject]; NSLog(@"Result is: %@", loginResult);

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