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  • How to implement a UINavigationController to a standard UIView

    - by tarnfeld
    This is the structure of my application currently: UIWindow UIViewController (Root View Controller) UINavigationController UITableView UIViewController (PresentModalViewControllerAnimated:YES) UITableView This is how I want it to be: UIWindow UIViewController (Root View Controller) UINavigationController UITableView UIViewController (PresentModalViewControllerAnimated:YES) UINavigationController UITableView I have a view that slides up and I want that view to have its own UINavigationController. It's for the app settings so I want to have nested options. Any ideas how to do this? The application type was a Navigation app to start with which is where the Root View Controller's UINavigationController came from.

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  • Calculating File size before download - Downloading NSURLConnection Slider timing

    - by sagar
    Ok ! Coming to the point directly. What I want to do is explained as follows. I have an url of MP3 file. ( for example Sound File ) Now, When user starts application. Download should start & for that I have implemented following methods. -(void)viewDidLoad { [super viewDidLoad]; NSURL *url=[NSURL URLWithString:@"http://xyz.pqr.com/abc.mp3"]; NSURLRequest *req=[NSURLRequest requestWithURL:url cachePolicy:NSURLCacheStorageNotAllowed timeoutInterval:120]; NSURLConnection *con=[[NSURLConnection alloc] initWithRequest:req delegate:self startImmediately:YES]; if(con){ myWebData=[[NSMutableData data] retain]; } else { // [MainHandler performSelector:@selector(targetSelector:) withObject:nil]; } } -(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { NSLog(@"%@",@"connection established"); [myWebData setLength: 0]; } -(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { NSLog(@"%@",@"connection receiving data"); [myWebData appendData:data]; } -(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog(@"%@",@"connection failed"); [connection release]; // [AlertViewHandler showAlertWithErrorMessage:@"Sorry, there is no network connection. Please check your network and try again."]; // [self parserDidEndDocument:nil]; } -(void)connectionDidFinishLoading:(NSURLConnection *)connection { [connection release]; } Now, Above methods work perfectly for downloading. But missing points are as follows. I can not get the exact size which is going to be downloaded. ( means I want to know what is the size of file - which is going to be download )

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  • MPVolumeView, avoid displaying "No Volume Available"

    - by Emil
    Hey. I have a project with a MPVolumeView in it. It is set up, and it works, the only thing is that when I mute the device, the text "No Volume Available" comes up instead of the MPVolumeView. The volumeView is initialized in the view volumeBounds, with that view's bounds. MPVolumeView *volumeView = [[[MPVolumeView alloc] initWithFrame:volumeBounds.bounds] autorelease]; [volumeBounds addSubview:volumeView]; [volumeView sizeToFit]; Thanks :)

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  • MPVolumeView, avoid displaying "No Volume Available"

    - by Emil
    Hey. I have a project with a MPVolumeView in it. It is set up, and it works, the only thing is that when I mute the device, the text "No Volume Available" comes up instead of the MPVolumeView. The volumeView is initialized in the view volumeBounds, with that view's bounds. MPVolumeView *volumeView = [[[MPVolumeView alloc] initWithFrame:volumeBounds.bounds] autorelease]; [volumeBounds addSubview:volumeView]; [volumeView sizeToFit]; Thanks :)

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  • How to load a UIView from a NIB?

    - by Winder
    I have been using UIViewControllers and initWithNibName with much success, basically using them as a convenient way to design the view with Interface Builder. Unfortunately I have built a hierarchy of views before noticing this line in the UIViewController documentation: Note: You should not use view controllers to manage views that fill only a part of their window My question is this: Having a very simple NIB that only has a UIView in addition to the default First Responder and Owning Object, what is the simplest way to load the UIView into my code? I have not been able to get loadNibNamed:owner:options: to work at this point, but suspect the answer will involve it somehow.

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  • How load WebView with another URL when navigated through tab bar viewController

    - by TechFusion
    Hello, I have created window based application, root controller as Tab bar controller. WebView is being loaded in Tab bar interfaced ViewController's View.WebView is created using IB.WebView object declared in ViewController as per below. //ViewController.h @interface ViewController:UIViewController{ IBOutlet UIWebview *Webview; } @property(nonatomic,retain)IBOutlet UIWebview *Webview; @end I am calling [WebView loadrequest] method in -viewDidLoad method and stopLoading will be called in -viewWillDisappear method. I am again reload it in -viewWillAppear:animated method to load it again when tab bar is pressed. //ViewController.m @implementation viewcontroller @synthesize Webview; -(void)viewDidLoad{ [super viewDidLoad]; [self.Webview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"www.apple.com"]]]; } -(void)viewWillAppear:(BOOL)animated{ [super viewWillAppear:animated]; [self.Webview reload]; } -(void)viewWillDisappear:(BOOL)animated{ [super viewWillDisappear:animated]; [self.Webview stopLoading]; } I am releasing WebView in -ViewDidUnload method -(void)viewDidUnload{ [super viewDidUnload]; [Webview release]; } -(void)dealloc{ [Webview release]; [super dealloc]; } Does Webview released correctly ? Here how to kill connection with URL when ViewWillDisappear method called ? How to load View with Different URL then it's loaded in -viewDidLoad method when ViewController interfaced tab is pressed ? Means if naviagated from one tab to another that ViewController interface tab which has WebView should load request with another URL. Does it correct to call [self.Webview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"www.stackoverflow.com"]]]; this method again in -viewWillAppear:animated method to load with another URL ? Thanks,

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  • What causes this error? "CALayer position contains NaN: [240 nan]"

    - by Kevlar
    I've seen this happen whenever i rotate a screen that has a UITableView on it. I've found out that it happens inbetween the willRotate and didRotate method calls in UIViewController My co-workers have seen it in other spots as well, usually around rotation. It hadnt started happening until very recently, and we're stumped as to how we should deal with it (google searches don't turn up the error message in its exact form). Has anyone else encountered this that knows what to do about it?

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  • UItabBarItem highlight state image

    - by Paul Solomon
    I'd like to be able to change the highlighted state image on an UITabBarItem when it is selected? Is it possible to subclass and access this? or do I need to roll my own navigation code? - start edit I didn't articulate what I was looking for earlier. I am looking for the semi-transparent white overlay reference that the device adds to the selected state/image of the UITabBar. See image! http://solomon71.com/images/UITabBarItem.png

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  • Strings in Objective-C++

    - by John Smith
    I just switched my code from Objective-C to Objective-C++. Everything goes swimmingly except for two lines. NSString * text1=[[NSString stringWithFormat:@"%.2f",ymax] UTF8String]; This line complains that error: cannot convert 'const char*' to 'NSString*' in initialization The second error related to the first is from the line: CGContextShowTextAtPoint(context, 2, 8, text1, strlen(text1)); It complains that error: cannot convert 'NSString*' to 'const char*' for argument '1' to 'size_t strlen(const char*)' Is there something I missed in the differences between ObjC and ObjC++?

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  • Strange problem with UIDocumentInteractionController

    - by Tùng Ð?
    I don't know what wrong with this code but everytime when I run the app, after the Menu is shown, the app crash. NSString * path = [[NSBundle mainBundle] pathForResource:@"tung" ofType:@"doc"]; UIDocumentInteractionController *docController = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:path]]; docController.delegate = self; //[docController presentPreviewAnimated:YES]; CGRect rect = CGRectMake(0, 0, 300, 300); [docController presentOptionsMenuFromRect:rect inView:self.view animated:YES]; Error I got: * Terminating app due to uncaught exception 'NSGenericException', reason: '-[UIPopoverController dealloc] reached while popover is still visible.' What should I do now ?

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  • MapKit internal calls causing crash

    - by Ronnie Liew
    I have a MKMapView in the view of a UIViewController. The app will crash randomly when the I pop the UIViewController off from the UINavigationController. In the dealloc method of the UIViewController, I have already assigned the MKMapView delegate to nil as below: - (void)dealloc { mapView.delegate = nil; [_mapView release]; _mapView = nil; [super dealloc]; } The crash log are also attached as follows: Crash log #1: Thread 0 Crashed: 0 libobjc.A.dylib 0x000026f6 objc_msgSend + 18 1 MapKit 0x0005676c -[MKUserLocationPositionAnimation animationDidStop:finished:] + 64 2 QuartzCore 0x00015a26 run_animation_callbacks(double, void*) + 282 3 QuartzCore 0x000158dc CA::timer_callback(__CFRunLoopTimer*, void*) + 100 4 CoreFoundation 0x00056bac CFRunLoopRunSpecific + 2112 5 CoreFoundation 0x00056356 CFRunLoopRunInMode + 42 6 GraphicsServices 0x00003b2c GSEventRunModal + 108 7 GraphicsServices 0x00003bd8 GSEventRun + 56 8 UIKit 0x00002768 -[UIApplication _run] + 384 9 UIKit 0x0000146c UIApplicationMain + 688 10 Refill 0x00002aea main (main.m:14) 11 Refill 0x00002a60 start + 44 Crash log#2 Thread 0 Crashed: 0 libobjc.A.dylib 0x000026f4 objc_msgSend + 16 1 MapKit 0x0005a20e -[MKUserLocationViewInternal userLocationViewAccuracyDidUpdate] + 42 2 MapKit 0x0005676c -[MKUserLocationPositionAnimation animationDidStop:finished:] + 64 3 QuartzCore 0x00015a26 run_animation_callbacks(double, void*) + 282 4 QuartzCore 0x000158dc CA::timer_callback(__CFRunLoopTimer*, void*) + 100 5 CoreFoundation 0x00056bac CFRunLoopRunSpecific + 2112 6 CoreFoundation 0x00056356 CFRunLoopRunInMode + 42 7 GraphicsServices 0x00003b2c GSEventRunModal + 108 8 GraphicsServices 0x00003bd8 GSEventRun + 56 9 UIKit 0x00002768 -[UIApplication _run] + 384 10 UIKit 0x0000146c UIApplicationMain + 688 11 Refill 0x00002aea main (main.m:14) 12 Refill 0x00002a60 start + 44 Seems like the MapKit is trying to update the MKMapView on the user location but the delegate has already been deallocated. What else I am missing here?

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  • Reload UItabbar view when using selectedIndex

    - by Hetal Vora
    Hi, In my application I have 4 tabs in my tab bar. There is a navigation where if i click on a button on tab bar 2 view, it should take me to tab bar 3 view. I am doing this by using setting the selectedIndex property of tab bar like appDelegate.tabBarController.selectedIndex = 2; However, this doesn't reload the view of tab bar 3. It simply shows the tab bar 3 view that was last accessed (which may be down the navigation hieararchy in tab bar 3). Please help as to how can i reload the root view of tab bar 3. I tried having the delegate method of tabbar as below: - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { [viewController.navigationController popToRootViewControllerAnimated:FALSE]; } but this works only if I click on a tab to go to the view and doesn't work with selectedIndex.Please help.

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  • Animating a custom property of CALayer subclass

    - by jemmons
    I have a CALayer subclass, MyLayer, that has a NSInteger property called myInt. I'd really like to animate this property via CABasicAnimation, but it seems CABasicAnimation only works on so-called "animatable" properties (bounds, position, etc). Is there something I can override to make my custom myInt property animatable?

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  • UINavigationBar height

    - by kpower
    In my app I work with an UINavigationController. I've added it to the window (MainWindow.xib, with IB) and simulated on my main view (in IB: Simulated User Elements / Top Bar / Navigation Bar). Navigation bar is displayed, but its height isn't standard. At least in IB it is bigger than in launched app. What's wrong? And how can I restore height to the initial state (as in IB)? P.S.: I know that I can set it directly from code. But this way looks like a "crutch".

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  • Can I center a UIToolbar item?

    - by Ben
    I am putting a label on a UIToolbar (per this tip: http://stackoverflow.com/questions/333441/adding-a-uilabel-to-a-uitoolbar). But the toolbar has a button on the left side, and so flexible spaces throw the label off the center, which is where I'd like it to be. Can I somehow center this toolbar item so that it remains centered in the toolbar? (Already tried balancing the button with a dummy fixed space, no dice.) Thanks!

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  • iPad popover textfield - resignFirstResponder doesn't dismiss keyboard

    - by mosdev
    I have two text fields email and password. The following code works fine when the fields are presented on a regular view but when they are on a popover, the resignFirstResponder does not work (becomeFirstResponder works). textFieldsShouldReturn was called for both fields. Any idea if I am missing something? Thanks! - (BOOL)textFieldShouldReturn:(UITextField *)theTextField { if (theTextField == email) { [password becomeFirstResponder]; return NO; } [theTextField resignFirstResponder]; return NO; }

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  • UISearchBar in a UITableView

    - by petert
    I'm trying to mimic the behaviour of a table view like one in the iPod app for Artists - it's a sectioned table view with a section index on the right and with a search bar at the top, but initially hidden when view shown. I am using sdk 3.1.2 and IB, so simply dragged a UISearchDisplayController in to my NIB - it does wire everything up ready for searching. The problem starts because I'm adding the UISearchBar in to the first section of the UITableView, because if I understand correctly I must do this so I can jump to the search bar by touching the search icon in the section index directly? When the table view appears I see the search bar but it has resized and I now have a white block behind the section index at the top. It does'nt take the color of the UISearchBar's surround which interestingly is different to that shown in Interface Builder. Searching around, I did find a tip to add a small navigation bar and a UISearchBar in a UIView, then add this to the table view cell - this works.. BUT the color of the navigation bar's background is what you'd expect normally (gray), not the different color as noted above?! More interesting, if I click the search bar to start a search, then click Cancel, all is fixed!!! The background along the whole tableview cell when the search bar is, is the same!!?! Thanks for any tips.

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  • "Instance variable 'xxx' accessed in class method....why?

    - by Michael Levy
    So please forgive me as I am very new to stackoverflow and to ios programming in general. I am attempting to change the text of a button i have, replacing current text with a date string (dateStringForInput) I am passing in from another class. The button is called myTodayButton and is declared in my .h file for my class inputMilesViewController... @property (strong, nonatomic) IBOutlet UIButton *myTodayButton; Below is the code from my .m. +(void) changeButtonText:(NSString*) dateStringForInput{ NSLog(@"we got to changebuttontext"); [_myTodayButton setTitle:dateStringForInput forState:UIControlStateNormal]; } I am getting the following error "Instance variable "_myTodayButton" accessed in class method. I understand that this is written in a class method rather than an instance method but i cant figure out how to get this change to happen. the button which prompts this call to changeButtonText is in the other class which is creating dateStringForInput. please help! thanks so much! be gentle with me....a bit overwhelmed . :-)

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  • How to crop the UIImage?

    - by Rajendra Bhole
    Hi, I develop an application in which i process the image using its pixels but in that image processing it takes a lot of time. Therefore i want to crop UIImage (Only middle part of image i.e. removing/croping bordered part of image).I have the develop code are, - (NSInteger) processImage1: (UIImage*) image { CGFloat width = image.size.width; CGFloat height = image.size.height; struct pixel* pixels = (struct pixel*) calloc(1, image.size.width * image.size.height * sizeof(struct pixel)); if (pixels != nil) { // Create a new bitmap CGContextRef context = CGBitmapContextCreate( (void*) pixels, image.size.width, image.size.height, 8, image.size.width * 4, CGImageGetColorSpace(image.CGImage), kCGImageAlphaPremultipliedLast ); if (context != NULL) { // Draw the image in the bitmap CGContextDrawImage(context, CGRectMake(0.0f, 0.0f, image.size.width, image.size.height), image.CGImage); NSUInteger numberOfPixels = image.size.width * image.size.height; NSMutableArray *numberOfPixelsArray = [[[NSMutableArray alloc] initWithCapacity:numberOfPixelsArray] autorelease]; } How i take(croping outside bordered) the middle part of UIImage?????????

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  • UITextField valueDidChange-Event

    - by Infinite
    Is there a way to catch a "valueDidChange"-Event for a Textfield? oO I've got a modalView with an UITextField. When the UITextField is empty, the "Done"-Button in the NavigationBar should be disabled and when there is Text entered, it should become enabled. Right now the only way to accomplish this by using the "textFieldShouldReturn"-Method. This works but is simply horrible for usability. Isn't there a way to check the requirements every time a letter is being entered or removed?

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  • UIViewController remove subview

    - by ghiboz
    Hi all! I add a view as subview of my uiviewcontroller like this: // into my ViewController: UIImageView *imView =[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"img.jpg"]]; imView.frame = CGRectMake(2, 46, 1020, 720); [self.view addSubview:imView]; now, with another button I wish remove the imView from the subview chain.. how can I do to do this?? thanks

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  • Can you force a MPMoviePlayerPlaybackDidFinishNotification ?

    - by Jonathan
    Hi, I have several movies that are played and presented using this code. As you can see I also have removed the default movie controls and have added a custom overlay which essentially just stops the video. Here is my problem... When I stop the movie with my custom overlay button, I don't seem to be getting the 'MPMoviePlayerPlaybackDidFinishNotification' Note: everything works normal if I let the movie play through and it stop by itself. Is the any way of 'forcing' the PlaybackDidFinish notification? Can I do something like this [self moviePlayBackDidFinish:something]; ? Thank You! - (void) playMovie { NSString *path = [[NSBundle mainBundle] pathForResource:@"movie_frog" ofType:@"m4v"]; NSURL *url = [NSURL fileURLWithPath:path]; MPMoviePlayerController *mp = [[MPMoviePlayerController alloc] initWithContentURL:url]; if(mp) { self.myMoviePlayer = mp; [mp release]; //movie view [self.view addSubview:myMoviePlayer.view]; myMoviePlayer.view.frame = CGRectMake(0.0,0.0,480,320); self.myMoviePlayer.controlStyle = MPMovieControlStyleNone; [self.myMoviePlayer play]; //videoNav _videoNav = [[videoNav alloc] initWithNibName:@"videoNav" bundle:nil]; [self.view addSubview:_videoNav.view]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayBackDidFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:nil]; } }

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