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  • uitableview delegate methods are not called

    - by Sean
    hi all i got the problem that the tableview methods are not called the first time the tableview is shown. if switch back to the previous view and then click the button to show the tableview again, the methods are called this time. i've to say that i show an actionsheet while the tableview is loading. the actionsheet i call in the ViewWillAppear method. thanks in advance sean

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  • UIDatePicker questions regarding displaying

    - by Zap
    Does anyone know if it's possible to change the minute interval of a UIDatePicker after it's been added to a UIView? Is it possible to show and hide 2 different datePickers? I want change the minuteInterval of the UIDatePicker to 5 and 30 when I click a button. Any sample code would be appreciated.

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  • OPENGLES 2.0 equivalent of glorthof?

    - by Zippo
    Hi Guys, In my iphone app, i need to project 3d scene into the 2D coordinates of the screen for some calculations. My objects go through various rotations, translations and scaling. So i figured i need to multiply the vertices with ModelView matrix first, then i need to multiply it with the Orthogonal projection matrix. First of all am on the right track? I have the Model View Matrix, but need the projection matrix. Is there a glorthof equivalent in ES 2.0? PS: i am new to opengl. Thanks for your help. Zippo

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  • image Gallery in iPhone

    - by Arun Thakkar
    Hello EveryOne!! Hope You all are fine and also in Your best of moods!! I need You Guys help.. I need to Create an Image Gallery!! That may be use Concept of Scrolling and Paging together. When i Click on Button, It will open new view in landscape mode. This View is for my Image Gallery.. It Shows 5 Images 1) - Centered Large Image With its description on Bottom. 2) - Next Coming image on left side, This image is slightly tilled at some angle, Without any description at bottom. 3)next to next coming image on left to 2nd image. 4) - previous image on right side, This image is slightly tilled at some angle, Without any description at bottom. 5)Previous to Previous image on right of 4th image And All images are scrollable.. like When i scroll 2nd image, it Will move to Center and show its description and image Which is already centered move to previous image. Sorry for my Confused English, I have also given link Bellow. kindly Check it. Click here For Showing image. I Tried for Basic code of paging and scrolling but unluckily nothing helpful. Kindly share your knowledge as well as Guide me to develop such image gallery. Looking forwards. Thanks, Regards, Arun Thakkar

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  • Problem Installing Application on iPhone: Resource has been modified

    - by Steve
    Hi, I am working on a simple iPhone application and when I run my app on my machine it installs on the device, but when I try it on a Windows machine using an ad-hoc distribution profile, it shows an error: "Application couldn't be installed because a resource has been modified." I have 2 iPhones and have tested the same app; on iPhone 2G it works fine, but on the 3G it shows the error I have written above. I tried to change the certificate and provisioning profiles, but no luck. Please let me know where I am mistaken. Thanks. Steve

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  • Interface Builder can't see classes in a static library

    - by teabot
    I have refactored some UIView sub-classes into a static library. However, when using Interface Builder to create view components for a project that uses the static library I find that it is unaware of the library classes. What do I need to do to make the class interfaces visible to Interface Builder? Update: The correct answer refers to dragging the headers into the 'XIB browser'. The '.h' files can be dragged from a finder window to the window area identified in this image:

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  • How to load View from NIB into another NIB?

    - by Sheehan Alam
    I have two NIB's ParentViewController.xib ChildViewController.xib ParentViewController.xib contains a UIView and a UIViewController. ChildViewController.xib contains a UIButton I want ChildViewController.xib to load in the ParentViewController.xib's UIView I have done the following: Created @property for UIView in ParentViewController Connected File's Owner to UIView in ParentViewController Set UIViewController in ParentViewController's NIB Name property to ChildViewController in Interface Builder Set ChildViewController view property to UIView in ParentViewController I was hoping this would load ChildViewController into my UIView in ParentViewController but no luck. I did get the following warning, which could be the culprit: 'View Controller (Child View)' has both its 'NIB Name' property set and its 'view' outlet connected. This configuration is not supported. I also have added additional code in ParentViewController's viewDidLoad(): - (void)viewDidLoad { [super viewDidLoad]; ChildViewController *childViewController = [[ChildViewController alloc]initWithNibName:@"ChildViewController" bundle:nil]; childViewController.view = self.myView; } Any thoughts on why ChildViewController does not load in the UIView of ParentViewController?

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  • using AudioQueues with AudioFileReadBytes

    - by Santosh
    Hey Im trying to work with Audio queues to play a very big mp3 file (arround 23 hours long). when audio queue asks for buffers though callback, im using AudioFileReadBytes() API to read the bytes from audio file and feed the queue. startQueue fails with the error : prime failed any inputs????? Also I succeeded playing file using AudioFileReadPackets API instead of AudioFileReadBytes(). But the problem with API is that when I seek (fast forward) by a long interval, say 9 hours (for example fast forward from 32 mins playtime to 9:32 mins) then AudioFileReadPackets() takes a long time (almost 2 mins) to read from new location. any comments would be greatly appreciated.

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  • Example: Objective C method alongside a php method

    - by Nic Hubbard
    I am very used to javascript and php programing, and I just jumped into programing Objective C. After working with it for a few weeks, the methods still confused me, as to how it is passing params, and how the methods are named. Since I am used to php, I am used to seeing: function myFunc($param1, $param2, $param3, $param4) { return FALSE; } Could someone show me how this would be written in Objective C, so that I can get used to writing methods that have parameters?

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  • How to use LIKE query in sqlite & iPhone

    - by 4thSpace
    I'm using the following for a LIKE query. Is this technique for LIKE correct? selectstmtSearch = nil; if(selectstmtSearch == nil){ const char *sql = "SELECT col1, col2 FROM table1 t1 JOIN table2 t2 ON t1.cityid = t2.cityid where t1.cityname like ?001 order by t1.cityname"; if(sqlite3_prepare_v2(databaseSearch, sql, -1, &selectstmtSearch, NULL) == SQLITE_OK) { sqlite3_bind_text(selectstmtSearch, 1, [[NSString stringWithFormat:@"%%%@%%", searchText] UTF8String], -1, SQLITE_TRANSIENT); } } The problem I'm having is after a few uses of this, I get an error 14 on sqlite3_open(), which is unable to open database. If I replace the LIKE with something such as: SELECT col1, col2 FROM table1 t1 JOIN table2 t2 ON t1.cityid = t2.cityid where t1.cityname = ? order by t1.cityname It works fine. I do open/close the DB before after the above code. Is there a way to troubleshoot exactly why the database can't be opened and what its relationship to my LIKE syntax is?

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  • UIWebView paging / line cut off

    - by John
    Hi, I am trying to page a webpage, so disable scrolling, then the second page is the same webpage scrolled down the page height. The problem I have is that the bottom of the first page often has 1/2 a line of text, then the second page has the bottom half of the line. Is there a way to ensure the entire line falls on one of the pages? Similar to Stanza etc? Thanks

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  • how to add a instance variable and use it in a custom UIButton

    - by thndrkiss
    Hi, I created a custom UIButton like this @interface CustomButton : UIButton { NSString *firstLine; NSString *secondLine; } @property (nonatomic, retain) NSString *firstLine; @property (nonatomic, retain) NSString *secondLine; @end CustomButton* rightButton = [CustomButton buttonWithType:UIButtonTypeDetailDisclosure]; rightButton.secondLine:@"hello"; error message is * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[UIButton setSecondLine:]: unrecognized selector sent to instance 0x43280e0' What has to be done to fix this up ? how should the instance variable added ?

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  • Microphone audio streaming from Cocoa mac app to iPhone

    - by Benzamin
    Hi devs, I'm trying to build a microphone audio streamer to iPhone. The server software will be a mac desktop app and the client will be iPhone, and they are connected via tcp port. I've successfully connected the mac app and iPhone, and tried to send a fixed test.m4a audio file first. But at the iPhone i grabbed the data well, when tried to play it i used AVAudioPlayer and its returning OSStatus error. I played around with the audio queue service but its very tricky and i only got some example for fixed length audio playing like http://cocoawithlove.com/2009/06/revisiting-old-post-streaming-and.html Now i need help on two things, how can i continuously grab audio data from Mac desktop microphone? And then after grabbing the data how i can play this unfixed length audio data in the iPhone. What exactly i need to do? Please please help me on this......

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  • How to customize the pop up menu in iPhone?

    - by Allen Dang
    The application I'm creating needs a function like user selects some text, a pop up menu shows, and user clicks "search" menu to perform a search directly. Problem is the current pop up menu provided by UIMenuController doesn't support to be extended. So my thought is to subscribe "UIMenuControllerDidShowMenuNotification", get the frame of pop up menu, and display the "search" button right aside. But during the implementation, I met a strange problem, the notification seems never be sent, means after the menu shown, I still cannot be notified, following are the key section of code. - (void)viewDidLoad { [super viewDidLoad]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(menuDidShow:) name:UIMenuControllerWillShowMenuNotification object:nil]; } - (void)viewDidUnload { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; [[NSNotificationCenter defaultCenter] removeObserver:self name:UIMenuControllerDidShowMenuNotification object:nil]; self.textView = nil; self.searchBar = nil; } - (void)menuDidShow:(NSNotification *)notification { NSLog(@"menu did show!"); } The code is too simple to make mistake, can someone help me to understand what's going on? Or what did I miss?

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  • I get EXC_BAD_ACCESS when MaxConcurrentOperationCount > 1

    - by kudorgyozo
    Hello i am using NSOperationQueue to download images in the background. I have created a custom NSOperation to download the images. I put the images in table cells. The problem is if I do [operationQueue setMaxConcurrentOperationCount: 10] and i scroll down several cells the program crashes with EXC_BAD_ACCESS. Every time it crashes at the same place in the table. There are 3 cells one after the other which are for the same company and have the same logo so basically it should download the images 3 times. Every other time it works fine. - (void) main { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; NSURL *url = [[NSURL alloc] initWithString:self.imageURL]; debugLog(@"downloading image: %@", self.imageURL); //NSError *error = nil; NSData *data = [[NSData alloc] initWithContentsOfURL:url]; [url release]; UIImage *image = [[UIImage alloc] initWithData:data]; [data release]; if (image) { if (image.size.width != ICONWIDTH && image.size.height != ICONHEIGHT) { UIImage *resizedImage; CGSize itemSize = CGSizeMake(ICONWIDTH, ICONHEIGHT); UIGraphicsBeginImageContext(itemSize); CGRect imageRect = CGRectMake(0.0, 0.0, itemSize.width, itemSize.height); [image drawInRect:imageRect]; resizedImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); self.theImage = resizedImage; } else { self.theImage = image; } [image release]; } [delegate didFinishDownloadingImage: self]; [pool release]; } This is how i handle downloading the images. If i comment out [delegate didFinishDownloadingImage: self]; in the function above it doesn't crash but of course it is useless. -(void) didFinishDownloadingImage:(ImageDownloadOperation *) imageDownloader { [self performSelectorOnMainThread: @selector(handleDidFinishDownloadingImage:) withObject: imageDownloader waitUntilDone: FALSE]; } -(void) handleDidFinishDownloadingImage:(ImageDownloadOperation *)imageDownloadOperation { NSArray *visiblePaths = [self.myTableView indexPathsForVisibleRows]; CompanyImgDownloaderState *stateObject = (CompanyImgDownloaderState *)[imageDownloadOperation stateObject]; if ([visiblePaths containsObject: stateObject.indexPath]) { //debugLog(@"didFinishDownloadingImage %@ %@", imageDownloader.theImage); UITableViewCell *cell = [self.myTableView cellForRowAtIndexPath: stateObject.indexPath]; UIImageView *imageView = (UIImageView *)[cell viewWithTag: 1]; if (imageDownloadOperation.theImage) { imageView.image = imageDownloadOperation.theImage; stateObject.company.icon = imageDownloadOperation.theImage; } else { imageView.image = [(TestWebServiceAppDelegate *)[[UIApplication sharedApplication] delegate] getCylexIcon]; stateObject.company.icon = [(TestWebServiceAppDelegate *)[[UIApplication sharedApplication] delegate] getCylexIcon]; } } }

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  • iPhone mapKit annotation for Current Location

    - by Simon
    Hello Im currently strugglung with annotations. how can i prevent the AnnotationLable for the blue GPS-point. (Here is an Image) - (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(MKAnnotation *) annotation{ if (annotation == mapView.userLocation) { return nil; } the function above isnt working, and i realized that i can't compare two coordinates. Any hint is welcome. Simon

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  • UIView shadow drawing wrong

    - by dc
    Trying to draw a shadow using code from this question: http://stackoverflow.com/questions/805872/how-do-i-draw-a-shadow-under-a-uiview I implement it in a UIView subclass as discussed, but when I try and use it using UIView *shadow = [[ShadowView alloc]initWithFrame:CGRectMake(100,100,100,100)]; I get only a black square, rather than something resembling shadow. Am I missing something here?

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  • Stop UITextView from jumping when programatically setting text

    - by Michael Waterfall
    Hi there, I have to update a small amount of text in a scrolling UITextView. I'll only be inserting a character where the cursor currently is, and I'll be doing this on a press of a button on my navigation bar. My problem is that whenever I call the setText method of the text view, it jumps to the bottom of the text. I've tried using contentOffset and resetting the selectedRange but it doesn't work! Here's my example: // Remember offset and selection CGPoint contentOffset = [entryTextView contentOffset]; NSRange selectedRange = [entryTextView selectedRange]; // Update text entryTextView.text = entryTextView.text; // Try and reset offset and selection [entryTextView setContentOffset:contentOffset animated:NO]; [entryTextView setSelectedRange: selectedRange]; Is there any way you can update the text without any scroll movement at all... as if they'd just typed something on the keyboard? Many thanks, Michael Edit: I've tried using the textViewDidChange: delegate method but it's still not scrolling up to the original location. - (void)textViewDidChange:(UITextView *)textView { if (self.programChanged) { [textView setSelectedRange:self.selectedRange]; [textView setContentOffset:self.contentOffset animated:NO]; self.programChanged = NO; } } - (void)changeButtonPressed:(id)sender { // Remember position self.programChanged = YES; self.contentOffset = [entryTextView contentOffset]; self.selectedRange = [entryTextView selectedRange]; // Update text entryTextView.text = entryTextView.text; }

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  • Will OpenGL give me any FPS improvement over CoreAnimation for scrolling a large image?

    - by Ben Roberts
    Hi, I'm considering re-writing the menu system of my iPhone app to use Open GL just to improve the smoothness of scrolling a big image (480x1900px) across the screen. I'm looking at doing this as a way to improve on using the method/solution as described here (http://stackoverflow.com/questions/1443140/smoother-uiview). This solution was a big improvement over the previous implementation but it's still not perfect and as this is the first thing the user will see I'd like it to be as flawless as possible. Will switching to OpenGL give me the sort of smooth scrolling I'm looking for? I've stayed clear of OpenGL until now as this is my first app and core animation has handled everything else I've thrown at it well enough, would be good to know if this alternative implementation is likely to work! thanks

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  • View controllers inside tab bar controller not auto-resizing on rotation

    - by Padawan
    (Correction: the view controllers are not auto-resizing instead of not auto-rotating.) In an iPad app, I have five regular view controllers (not navigation controllers or anything like that) inside a tab bar controller. The tab bar controller is just a plain UITabBarController declared in the app delegate. All the view controllers return YES in the shouldAutorotateToInterfaceOrientation method. On both the simulator and device, on rotation, the tab bar and the current view controller rotate but the currently selected view controller (call it A) does not resize properly. It keeps its portrait width and height (but it is rotated). If I switch to another view controller B and then back to A (without rotating the device again), A appears correctly resized. This happens with any of the five view controllers Why doesn't the currently selected view controller resize immediately on rotation and how do I fix it? Thanks.

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