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  • iphone view controller class - how to

    - by Brodie4598
    Hello - I need to create my own UIView class and it is not something I have had to do. I created the class, then laid out the small view in IB (it's just a few labels that i will later need to add data to ). but now im stuck on how to actually put an instance of it in my main view. Can someone point me in the direction of a good tutorial? The closest thing I have done to this is creating a custom tableViewCell. DataTagViewController *dataTag = [[DataTagViewController alloc]init]; [theMap addSubView: dataTag];

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  • Total Size of NSMutableArray object

    - by sj wengi
    Hi Folks, I've got an NSMutableArray that holds a bunch of objects, what I'm trying to figure out is how much memory is the array using. After looking at a couple of places I know about the sizeof call, and when I make it I get 32 bits (which is the size of the NSMutableArray object it self). Example code: NSMutableArray *temp = [[NSMutableArray alloc]init]; [temp addObject:objectxyz]; [temp addObject:objectabc]; [temp addObject:object123]; now I want to know the size :) Thanks, Sj

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  • Trouble using xib files in libraries

    - by flohei
    Hi there, I'm having some trouble working with libraries and included xib files. Let me explain my situation first. I've got a project that's running pretty good. Now I need a part of my project as a library for another customer who want's to use some of the functionality in his app. I've created a library with help of that highly recommended article. My customer should be able to initialize a main view controller like this: LibraryMainViewController *lmvc = [[LibraryMainViewController alloc] initWithNibName:@"LibraryMainViewController.xib" bundle:foo]; That for sure leads to an error when I try to present that view controller modally. I'm not sure what bundle I have to use here. I tried something like [NSBundle bundleForClass:[SomeClassInTheLibrary class]]; but that didn't solve the problem. I would be glad if someone could tell me how to actually use a xib file in that kind of situation. Thanks –f

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  • How do I make a UIAlertView happen only on the first start-up of an iPhone app?

    - by user309245
    I'm using the UIAlertView to make a pop-up happen once the app has started up. It works fine but I only want the pop up to happen on the first start-up of the app. At the moment I've got the UIAlertView in the AppDelegate class, after the application didFinishLaunching. Here is my code at the moment. - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { sleep(4); UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Welcome!" message:@"SAMPLE!!!" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show]; [alert release]; I'm new to app development so sorry if this is simple. Thanks in advance! :)

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  • Creating and releasing objects in the same method, while using self as delegate

    - by user200341
    In objective-c you are responsible for releasing objects you allocate, but what happens when you allocate an object in a method, assign self as the objects delegate, and then release the object. The callbacks from the newly created (and released) object fails at this point, or rather, doesn't happen. - (void)doSomething { MyObj *myObj = [[MyObj alloc] init]; myObj.delegate = self; [myObj performOperation]; [myObj release]; } - (void)callbackMethodFromMyObj:(NSString *)message { NSLog(message); } I can't release the object until the callback has occurred, and I can't avoid releasing the object in the same method that creates it (because it exists outside the scope). One way of doing it would be to pass the object along in the call-back and release it in the callback, but is this the right way to go about this?

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  • detecting when nav controller popped to root

    - by phil swenson
    Here is my code: SignupController* signupController = [[SignupController alloc] initWithNibName:@"SignupController" bundle:nil]; [window addSubview:[navigationController view]]; [window makeKeyAndVisible]; self.navigationController.title = @"MyNavController"; [self.navigationController pushViewController:signupController animated:YES]; [signupController release]; Unfortunately for me calling pushViewController is not synchronous, so the next line ([signupController release]) is executed immediately. I need to detect hen the signupController has popped back to the root so I can take the data from the signup controller and do a registration or login. Any ideas? Thanks

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  • Pushing View from UITableView Problem

    - by golfromeo
    Basically, what I want is to be able to press a record in a table, and have it push to another view. To do this, I created a nib file and a UIViewController subclass (for the "pushed" view). I set the nib file's "File Owner" to be the controller I created. Then, in the view controller of the table that will push that view, I set the didSelectRowIndexAtPath: method to include the following: SearchTableController *vc = [[SearchTableController alloc] initWithNibName:@"SearchTable" bundle:[NSBundle mainBundle]]; [self.navigationController pushViewController:vc animated:YES]; [vc release]; (where "SearchTableController" is the name of the UIViewController subclass and "SearchTable" is the name of the nib file) However, when I run this code and click on the record, nothing happens- the app doesn't crash, but the view doesn't get pushed. The code is getting run, because it works when I NSLog(), but it doesn't seem to be pushing the view. Thanks for any help in advance.

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  • Cannot commit in sqlite using a wrapper

    - by user271753
    - (IBAction)SetupButtonPressed:(id)sender { Sqlite *sqlite = [[Sqlite alloc] init]; NSString *writableDBPath = [[NSBundle mainBundle]pathForResource:@"Money"ofType:@"sqlite"]; if (![sqlite open:writableDBPath]) return; [sqlite executeNonQuery:@"CREATE TABLE test (key TEXT NOT NULL, num INTEGER, value TEXT);"]; } Hey guys the above code runs at first but the next time , the table does not exists in the database ! I am using http://th30z.netsons.org/2008/11/objective-c-sqlite-wrapper/ what am I doing wrong ? Or could you please suggest me a really simple tutorial for core data ?

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  • How to release audio properly? (AVAudioPlayer)

    - by Aluminum
    Hello everyone! I need help with my iOS application ^^,. I want to know if I'm releasing AVAudioPlayer correctly. MyViewController.h #import <UIKit/UIKit.h> @interface MyViewController : UIViewController { NSString *Path; } - (IBAction)Playsound; @end MyViewController.m #import <AVFoundation/AVAudioPlayer.h> #import "MyViewController.h" @implementation MyViewController AVAudioPlayer *Media; - (IBAction)Playsound { Path = [[NSBundle mainBundle] pathForResource:@"Sound" ofType:@"wav"]; Media = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:Path] error:NULL]; [Media play]; } - (void)dealloc { [Media release]; [super viewDidUnload]; } @end

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  • Prevent printing -0

    - by fishinear
    If I do the following in Objective-C: NSString *result = [NSString stringWithFormat:@"%1.1f", -0.01]; It will give result @"-0.0" Does anybody know how I can force a result @"0.0" (without the "-") in this case? EDIT: I tried using NSNumberFormatter, but it has the same issue. The following also produces @"-0.0": double value = -0.01; NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init]; [numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle]; [numberFormatter setMaximumFractionDigits:1]; [numberFormatter setMinimumFractionDigits:1]; NSString *result = [numberFormatter stringFromNumber:[NSNumber numberWithDouble:value]];

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  • Why does initWithFrame have the wrong frame value?

    - by greypoint
    I have a subclass of UIButton called INMenuCard and I am overriding the initWithFrame to include an activity indicator. The menuCard places correctly but any internal reference to "frame" give me "inf,inf,0,0" which means my activityIndicator subview is not placed correctly. What might I be missing? @implementation INMenuCard - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { CGRect innerFrame = CGRectInset(frame, 50.0f, 100.0f); activityIndicator = [[UIActivityIndicatorView alloc] initWithFrame:innerFrame]; activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhite; [self addSubview:activityIndicator]; } return self; } I am instantiating INMenuCard with (debugging shows the CGRect values are correct): CGRect cardFrame = CGRectMake(cardX, cardStartY, cardWidth, cardHeight); INMenuCard *menuCard = [[INMenuCard buttonWithType:UIButtonTypeCustom] initWithFrame:cardFrame]; [theView addSubView:menuCard];

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  • image is not getting loaded in view.

    - by anurag
    I have created 2 views named "FirstView" and "SecondView".SecondView's nib file has an UIImage view object as its IBOtlet.Now I am getting an UIImage object from some FirstViewController's method.Now I am setting the SecondViewController's imageView property with that image and then I am pushing my SecondView Controller's object in Navigation Controller.The SecondView gets loaded but that image is not shown in that view. The code is as follows:..... - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo { [[picker parentViewController] dismissModalViewControllerAnimated:YES]; SecondViewController *secondView=[[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:[NSBundle mainBundle]]; secondView.imageView.image=img; [self.navigationController pushViewController:secondView animated:YES]; }

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  • image is not getting loaded in view.

    - by anurag
    I have created 2 views named "FirstView" and "SecondView".SecondView's nib file has an UIImage view object as its IBOtlet.Now I am getting an UIImage object from some FirstViewController's method.Now I am setting the SecondViewController's imageView property with that image and then I am pushing my SecondView Controller's object in Navigation Controller.The SecondView gets loaded but that image is not shown in that view. The code is as follows:..... (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo { [[picker parentViewController] dismissModalViewControllerAnimated:YES]; SecondViewController *secondView=[[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:[NSBundle mainBundle]]; secondView.imageView.image=img; [self.navigationController pushViewController:secondView animated:YES]; }

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  • Disable link in UIWebView in appearance and function

    - by Peter
    Hello, I wish to disable the href links on a UIWebView. First, I want the look of the link to change so the user doesn't think it is clickable. Second, I want the actual link to not be able to be tapped. I do not want to try webView:shouldStartLoadWithRequest:navigationType: since that not change the appearance of my links. I found this answer: Disabling visible links in UIWebView But the above hasn't worked for me. This is my code: NSString* s=[[NSString alloc] initWithFormat:@"for (a in document.getElementsByTagName(\"a\")) {a.href = \"\";}"]; [myWebView stringByEvaluatingJavaScriptFromString:s]; I've been working on this for hours, any suggestions are appreciated! Thanks!

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  • NSSortdescriptor, finding the path to the key I wish to use for sorting.

    - by RickiG
    Hi I am using an NSSortdescriptor to sort a collection of NSArrays, I then came across a case where the particular NSArray to be sorted contains an NSDictionary who contains an NSDictionary. I would like to sort from the string paired with a key in the last dictionary. This is how I would reference the string: NSDictionary *productDict = [MyArray objectAtIndex:index]; NSString *dealerName = [[productDict objectForKey:@"dealer"] objectForKey:@"name"]; How would I use the dealerName in my NSSortdescriptor to sort the array? NSSortDescriptor * sortDesc = [[NSSortDescriptor alloc] initWithKey:/* ? */ ascending:YES]; sortedDealerArray = [value sortedArrayUsingDescriptors:sortDesc]; [sortDesc release]; Hope someone could help me a bit with how I go about sorting according to keys inside objects inside other objects:) Thank you.

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  • navigationproblem

    - by sudhakarilla
    I have problem .. i get debugerror i will used in json Category *selectcategory = [[data categorys]objectAtindex:indexPath.row]; productlistviewcontroller *plviewcontroller = [[productlistviewcontroller alloc]initwithNibName:@"productlistviewcontroller" bundle:nil]; plviewcontroller.category = selectedcategory; [self.navigationcontroller pushviewcontroller:plviewcontroller animated:YES]; please check the my program. it doesnot goto nextviewcontroller. console error is 2009-02-13 18:32:17.405 xxxxxxxx[1491:20b] * -[NsDecimalNumber length]: unrecognized selector sent to instance 0xc3f10ff0 2009-02-13 18:32:17.406 xxxxxxxx[1491:20b] Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '** -[NsDecimalNumber length ]: unrecognized selector sent to instance 0xc3f10ff0' 2009-02-13 18:32:17.406 xxxxxxxx[1491:20b] Stack: ( 2417225995, 2527100475, 2417255178, 2417248524, 2417248722, 22199, 9853, 816111650, 816149355, 2458333742, 2416728869, 2416729304, 827745792, 827745989, 816114848, 816160924, 9628, 9482 ) please send soluation...

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  • Adding a subview larger than cellHeight to a UITableViewCell?

    - by MathieuK
    I'm trying to add a subview to a UITableViewCell and the design that I'm working from demands that this particular subview (an image) needs to be larger than the actual UITableViewCell and thus partly overlap its siblings. So I've set up my table cell, generated my image and added it to the cell's contentView: // rowHeight for the UITableView is 45.0f UIImage *image = [self createCellThumbnail: someImage]; UIImageView *thumbView = [[UIImageView alloc] initWithFrame: CGRectMake(150, -5, 55,55)]; thumbView.transform = CGAffineTransformMakeRotation(0.1f); thumbView.image = image; cell.clipsToBounds = NO; cell.contentView.clipsToBounds = NO; [cell.contentView addSubview: thumbView]; While the image will 'overflow' into the cell below it, the top of the image is always clipped, as demonstrated here: http://imgur.com/WDsAx . Does anyone know if what I'm trying to do is possible with the current approach or should I just figure out a way to draw these images onto the UITableView after all the cells are drawn (it's a non-scrollable tableview, so that would work and be fairly easy).

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  • Problem with accessing classes from another class.

    - by srikanth rongali
    I have a classA, classB,classC. I have another class classABC; All are CCLayer inherited. I need to call all the classA, classB, classC from classABC. #import <Foundation/Foundation.h> #import "cocos2d.h" @interface classABC : CCLayer { classA *aClass; } @property(nonatomic, retain)classA *aClass; @end #import "classABC" #import "classA.h" #import "classB.h" #import "classC.h" @implementation classABC -(id)init { if( (self = [super init]) ) { ClassA *aClass = [[ClassA alloc]init]; CCScene *aClassS = [CCScene node]; CCLayer * aClassL = [aClass node]; [aClassS addChild: aClassL]; [[CCDirector sharedDirector] setAnimationInterval:60.0/60]; [[CCDirector sharedDirector] replaceScene: aClass]; } return self; } @end But I am not getting the classA displayed. How should I do it ? Thank You.

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  • iPhone SDK - How to display a photo taken with the camera inside a UINavigationController?

    - by dan
    This is my code so far: /* class: myViewController @interface myViewController: UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate> */ - (IBAction) getPicture { UIImagePickerController * picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.sourceType = UIImagePickerControllerSourceTypeCamera; [self presentModalViewController:picker animated:YES]; } - (void) imagePickerController:(UIImagePickerController *)thePicker didFinishPickingMediaWithInfo:(NSDictionary *)imageInfo { [[thePicker parentViewController] dismissModalViewControllerAnimated:YES]; UIImage *img = [imageInfo objectForKey:@"UIImagePickerControllerOriginalImage"]; self.myImageView.image = img; } So basically I'm trying to get a photo from the iPhone camera and display it in a UIImageView. This works perfectly fine as long the class myViewController is displayed as a standalone view. If I'm putting the View inside a UINavigationController the UIImageView won't display the image after taking one with the camera. But if I choose a picture from the library everything is fine again. So why does the UIImageView won't display a image taken with the camera inside a UINavigationController?

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  • Navigating between 2 ViewControllers

    - by Kobe.o4
    Im using Navigation Controller for my ViewControllers,I set my importantViewController as something like this to be its RootView: UINavigationController *navControl = [[UINavigationController alloc] initWithRootViewController: vc]; [self presentModalViewController: navControl animated: YES]; Then, I pushView anotherView the FrontViewController like this: [self.navigationController pushViewController:vc animated:YES]; After a button is pressed in FrontViewController another view will be pushed ViewA but it is connected with another ViewController ViewB the same way as this AGAIN: [self.navigationController pushViewController:vc animated:YES]; (Which I think Im doing wrong when dismissing either of them with [self.navigationController popViewControllerAnimated:YES];) This is an illustration: My problem is, I need to navigate between View A and View B then when I dismiss either of them it will got back to FrontViewController. Like a child of a child View. Thanks.

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  • UITableView issue (iOS)

    - by Oktay
    I wonder why cellForRowAtIndexPath function is called when scrolling the UITableView. Does it mean on every scrolling cell configuration code runs again? I have a slowness problem when scrolling the table. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"CountryCell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } // Configure the cell... NSString *continent = [self tableView:tableView titleForHeaderInSection:indexPath.section]; NSString *country = [[self.countries valueForKey:continent] objectAtIndex:indexPath.row]; cell.textLabel.text = country; cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; return cell; }

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  • Simple addView problem

    - by Buyin Brian
    Hi there. I have a simple addView problem that is driving me nuts, I know I am overlooking something simple, perhaps another set of eyes can help. I have a Nib with a view that has a class identity set to TestView In my view controller, I use the following code: CGRect myRect = CGRectMake(0, 0, 320,240); TestView *myTest = [[TestView alloc] initWithFrame:myRect]; [self.view addSubview:myTest]; I have a NSLog in the TestView class's initWithFrame that fires when the above code is executed, but the view doesn't appear in the view controllers view. Thanks for your help.

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  • should variable be released or not? iphone-sdk

    - by psebos
    Hi, I have the following piece of code from a book. There is this function loadPrefs where the NSString *userTimeZone is being released before the end of the function. Why? The string was not created with alloc and I assume that the stringForKey function returns an autoreleased NSString. Is this an error or am I missing something? Is it an error in the book? (I new into objective-C) In the documentation for stringForKey the only thing it mentions is: Special Considerations The returned string is immutable, even if the value you originally set was a mutable string. The code: - (void) loadPrefs { timeZoneName = DefaultTimeZonePref; NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; NSString *userTimeZone = [defaults stringForKey: TimeZonePrefKey]; if (userTimeZone != NULL) timeZoneName = userTimeZone; [userTimeZone release]; show24Hour = [defaults boolForKey:TwentyFourHourPrefKey]; } Thanks!!!!

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  • How to create an image from canvas data?

    - by Jakub Hampl
    In my application I am trying to save an arbitrary part of a rendered HTML canvas to an image file. In my Javascript I call ctx.getImageData(x, y, w, h) and pass the resulting object to my macruby code (though if you know a solution in objc I am also very interested). There I'm trying to create a NSBitmapImageRep object so that I can then save to an image format the user desires. This is my code so far (the function gets a WebScriptObject as it's argument): def setimagedata(d) w = d.valueForKey("width").to_i h = d.valueForKey("height").to_i data = Pointer.new(:char, d.valueForKey("data").valueForKey("length").to_i) d.valueForKey("data").valueForKey("length").to_i.times do |i| data[i] = d.valueForKey("data").webScriptValueAtIndex(i).to_i end puts "data complete" # get's called @exported_image = NSBitmapImageRep.alloc.initWithBitmapDataPlanes(data, pixelsWide: w, pixelsHigh:h, bitsPerSample: 32, samplesPerPixel: 4, hasAlpha: true, isPlanar: false, colorSpaceName: NSCalibratedRGBColorSpace, bitmapFormat: NSAlphaNonpremultipliedBitmapFormat, bytesPerRow: 0, bitsPerPixel: 0) puts "done" # doesn't get called end The code doesn't seem to get through the initWithBitmapDataPlanes function but gives no error. My question is: what am I doing wrong? Is this approach reasonable (if not, what would be better?).

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  • Navigationcontroller, why isnt this working?

    - by f0rz
    Hi ! Why wont this work? View1 loads View2. In view2: - (void) goToView { View3 *plainText = [[Tabview_testViewController alloc] initWithNibName:@"View3" bundle:nil]; [self.navigationController pushViewController:plainText animated: NO]; [plainText release]; } - (void)viewDidLoad { [self goToView]; [super viewDidLoad]; } This will not trigger navigationController to pushView, but if I add a button and setAction (goToView) it works perfectly. What kind of problem do I missing here? Regards

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