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  • Tap Status Bar Time

    - by Jim Bonner
    I am using a UITableView in my app. After scrolling down, if I tap on the status bar time, the table is repositioned to the top. Any idea how this is done and is it possible to intercept the action. TIA, Jim B

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  • How can I get a custom UITableView to automatically scroll to a selected text field?

    - by nornagon
    I have a UITableView, which I am controlling from a custom UIViewController. When the user clicks the 'add' button, I add a row to the UITableView with a text field in it, and make it the first responder. The problem is, when the bottom of the table is out of view (or hidden by the keyboard), the UITableView doesn't scroll to bring the text field into view. UITableViewController does this automatically, but my View Controller can't be a subclass of UITableViewController.

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  • iPad keyboard will not dismiss if navigation controller presentation style is "form sheet".

    - by Kalle
    UPDATE: This is apparently "works as intended" classed by Apple. See accepted answer below for details. Update: this question is about a behavior discovered in the iPad keyboard, where it refuses to be dismissed if shown in a modal dialog with a navigation controller. Basically, if I present the navigation controller with the following line: navigationController.modalPresentationStyle = UIModalPresentationFormSheet; The keyboard refuses to be dismissed. If I comment out this line, the keyboard goes away fine. ... I've got two textFields, username and password; username has a Next button and password has a Done button. The keyboard won't go away if I present this in a modal navigation controller. WORKS broken *b = [[broken alloc] initWithNibName:@"broken" bundle:nil]; [self.view addSubview:b.view]; DOES NOT WORK broken *b = [[broken alloc] initWithNibName:@"broken" bundle:nil]; UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:b]; navigationController.modalPresentationStyle = UIModalPresentationFormSheet; navigationController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal; [self presentModalViewController:navigationController animated:YES]; [navigationController release]; [b release]; If I remove the navigation controller part and present 'b' as a modal view controller by itself, it works. Is the navigation controller the problem? WORKS broken *b = [[broken alloc] initWithNibName:@"broken" bundle:nil]; b.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal; [self presentModalViewController:b animated:YES]; [b release]; WORKS broken *b = [[broken alloc] initWithNibName:@"broken" bundle:nil]; UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:b]; [self presentModalViewController:navigationController animated:YES]; [navigationController release]; [b release];

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  • How to make UIImagePickerController works under switch case UIActionSheet

    - by Phy
    -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { UIImage *tempImage = [info objectForKey:UIImagePickerControllerOriginalImage]; imgview.image = tempImage; [self dismissModalViewControllerAnimated:YES]; [picker release]; } -(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker { [self dismissModalViewControllerAnimated:YES]; [picker release]; } -(IBAction) calllib { img1 = [[UIImagePickerController alloc] init]; img1.delegate = self; img1.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; [self presentModalViewController:img1 animated:YES]; } all the codes above works well for taking out photos from the photo library. problem is that when i tried to use it under the UIActionSheet it does not work. i just copy the lines of codes from the -(IBAction) calllib as follow. (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { UIImage *detectface = [Utilities detectFace:imgview.image]; UIImage *grayscale = [Utilities grayscaleImage:imgview.image]; UIImage *avatars = [Utilities avatars:imgview.image]; img1 = [[UIImagePickerController alloc] init]; img1.delegate = self; img1.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; switch (buttonIndex) { case 0: [self presentModalViewController:img1 animated:YES]; imgview.image = detectface; break; case 1: [self presentModalViewController:img1 animated:YES]; imgview.image = grayscale; break; case 2: [self presentModalViewController:img1 animated:YES]; imgview.image = avatars; break; default: break; } } it does not work. can somebody help me to figure out what is the problem? the switch case works perfectly without the [self presentModalViewController:img1 animated:YES]; ... thanks

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  • How to remove segmentedcontroller from uinavigationcontroller after view pops?

    - by cannyboy
    I'm building a segmented control within my viewDidLoad method, like so: NSArray *tabitems = [NSArray arrayWithObjects:@"ONE", @"TWO", nil]; UISegmentedControl *tabs = [[UISegmentedControl alloc] initWithItems:tabitems]; tabs.segmentedControlStyle = UISegmentedControlStyleBar; tabs.frame = CGRectMake(185.0, 7.0, 130.0, 30.0); tabs.selectedSegmentIndex = 0; [self.navigationController.navigationBar addSubview:tabs]; [tabs release]; But when the user goes Back in the uinavigationcontroller hierarchy, the segmented controller stays on the navigation bar. How would I get rid of it? Or am I doing something fundamentally wrong?

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  • What's the best way to measure and track performance over various calls at runtime?

    - by bitcruncher
    Hello. I'm trying to optimize the performance of my code, but I'm not familiar with xcode's debuggers or debuggers in general. Is it possible to track the execution time and frequency of calls being made at runtime? Imagine a chain of events with some recursive calls over a fraction of a second. What's the best way to track where the CPU spends most of its time? Many thanks. Edit: Maybe this is better asked by saying, how do I use the xcode debug tools to do a stack trace?

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  • What route to take to become a systems developer?

    - by Ramin
    In the past I have done a lot of Java and Python coding. Mostly, I worked on web apps and some simple console or gui apps. I also have a formal education in computer science. What route should I take to become a systems developer? I always did like C++, but never had a chance to use it for anything. Would mastering C++ be one of the steps? If so what resources can you suggest? Also, I would like to know how much different is the work between plain old development and systems development. There seem to be a lot of overlapping between the two.

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  • Why aren't Admob click callback delegate methods getting called?

    - by executor21
    I'm integrating the latest version of the admob sdk (version 20100412) into my app. The ads get displayed, but I need the app to make some changes when an ad is clicked and admob displays a full-screen browser. However, none of the callback methods (willPresentFullScreenModal, didPresentFullScreenModal, willDismissFullScreenModal, and didDismissFullScreenModal) are called, even though other delegate methods are. Why aren't these callbacks being made? They were in the previous versions of the SDK, and the sample app doesn't use them, so it's no help. EDIT: removed the double negative from the question title

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  • Searchbar to search array items and displays them on a tableview?

    - by skiria
    I want to build an app that shows a empty tableview. Then users can write a text on a searchbar and when they click on Search button the tableview will be written with array items founded. I've see this tutorial: link text, but I only need to search when user click SearchButton. How can I do this? What methods do i have to use? I've tried with this method, but it doesn't works. - (void) searchBarSearchButtonClicked:(UISearchBar *)theSearchBar { NSInteger nVideos = [appDelegate.allVideos count]; NSLog(@"number of videos: %i", nVideos);

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  • How do I stack images to simulate depth using Core Animation?

    - by Jeffrey Berthiaume
    I have a series of UIImages with which I need to simulate depth. I can't use scaling because I need to be able to rotate the parent view, and the images should look like they're stacked visibly in front of each other, not on the same plane. I made a new ViewController-based project and put this in the viewDidLoad (as well as attached three 120x120 pixel images named 1.png, 2.png, and 3.png): - (void)viewDidLoad { // display image 3 UIImageView *three = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"3.png"]]; three.center = CGPointMake(160 + 60, 240 - 60); [self.view addSubview:three]; // rotate image 3 around the z axis // THIS IS INCORRECT CATransform3D theTransform = three.layer.transform; theTransform.m34 = 1.0 / -1000; three.layer.transform = theTransform; // display image 2 UIImageView *two = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"2.png"]]; two.center = CGPointMake(160, 240); [self.view addSubview:two]; // display image 1 UIImageView *one = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"1.png"]]; one.center = CGPointMake(160 - 60, 240 + 60); [self.view addSubview:one]; // rotate image 3 around the z axis // THIS IS INCORRECT theTransform = one.layer.transform; theTransform.m34 = 1.0 / 1000; one.layer.transform = theTransform; // release the images [one release]; [two release]; [three release]; // rotate the parent view around the y axis theTransform = self.view.layer.transform; theTransform.m14 = 1.0 / -500; self.view.layer.transform = theTransform; [super viewDidLoad]; } I have very specific reasons why I'm not using an EAGLView and why I'm not loading the images as CALayers (i.e. why I'm using UIImageViews for each one). This is just a quick demo that I can use to work out exactly what I need in my parent application. Is there some matrix way to translate these 2d images along the z-axis so they will look like what I'm trying to represent? I've gone through the other StackOverflow articles as well as the Wikipedia references, and have not found what I'm looking for -- although I might not necessarily be using the right terms for what I'm trying to do.

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  • Force a view change from a button when using UITabBarController

    - by user342197
    Hello - When using a UITabBarController, when the user enters some data on View1 and presses a button, I need to perform some calculations and present the results on View2. I have an AppDelegate, View1Controller, View2Controller, and View3Controller (View3 is a basically static view). My AppDelgate declares UITabBarController *rootController; On View1, I have the calculations being performed in an IBAction for buttonPressed; however, I can't seem to force the view to switch to View2 programmatically. I have done a lot of searching for similar problems, and think I should be doing something like "self.rootController.selectedIndex = 1"; however,when I do this from within buttonPressed on my View1Controller, I get an error "request for member rootController in something not in a structure or union". I think I'm missing something basic here... probably need do do something with my AppDelegate, but I'm banging my head against the wall. Can anyone provide some guidance in this situation...like key things I should do in View1Controller header and implementation with reference to my AppDelgate? Thank you!

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  • Plist array , cannot change dictonaries inside

    - by Andy Jacobs
    i have a plist that's at its root an array with dictonaries inside it. i load a plist from my recourses as an NSMutableArray. [NSMutableArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Filters" ofType:@"plist"]] i store it into nsuserdefault because it has to be persistent between startups. [[NSUserDefaults standardUserDefaults] setObject:array forKey:@"filters"]; but i can't change the dictonaries in the array because they are not mutable. how can i make them mutable?

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  • How can I a sprite image from a set of sprites which have different properties for each sprite?

    - by srikanth rongali
    In my application one player and 10 targets are there. Each target appears one after the other (from target1 to target10). It's a shooting game. If we hit the first target then second target will come. The targets have properties like name, speedOfGunDraw, probability to hit the player, speedOfFire. What should I do to make them appear one after the other with these properties. I am using CCMenuItem for the target. I am using a sprite for the player. Please give me idea to do this. Thank You.

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  • Added buttons, webview, added outlets, but can't play with them in the code...

    - by Tom
    Hi! I made a toolbar with two buttons on it. I then created two outlets in my class controller. Then I hooked the the controller to the buttons and selected the outlets. Finally I rewritten the class files (that added: IBOutlet id next; IBOutlet id previous; to my .h file). So now, everything looks okay. But then I try somewhere in the code to change the state of one of my button like this: next.enabled = YES; I tried with self. too but unfortunately I receive this error message: error: request for member 'enabled' in something not a structure or union Do you have any idea of what's happening there? And yes I have: #import <UIKit/UIKit.h> :) Using: [next setEnabled:YES]; gives me no error but still doesn't work... And finally, for documenting purposes here's the whole method: - (void)viewDidLoad { [super viewDidLoad]; if (!self.currentLevel) { self.currentLevel = @"1"; } NSArray *etape = [self.etapes objectForKey:self.currentLevel]; if ([etape count] > 0) { self.navigationItem.title = [etape objectAtIndex:1]; if ([etape count] > 1) { [next setEnabled:YES]; } } else { self.navigationItem.title = @"Aucune étape"; } } When I do: NSLog(@"%@", [next class]); It returns (null) ... I guess it is supposed to be UIBarButtonItem... It seems that it is impossible to play with any outlets even if I don't receive any errors while playing with them...

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  • Puzzled with nib files...

    - by Michael
    I know nib files are serialized objects and they have owner, outlets to make connections. Using XCode Navigation window template I created application, which in its order created 2 nib files - MainWindow and SecondView. I can't understand how MainWindow is referring to SecondView, there is no connection between those two as far as I can see. SecondView's owner is UIViewController and in MainWindow there is a navigation tab which is also UIViewController. But how they are connected in IB I can't understand... Also I don't understand who is instanciating MainWindow's owner object and where that object is being kept, where is the variable which is UIApplication myApp = [[UIApplication alloc] init]. If I create 10 nib files with UIViewController owner, who will trigger their deserialization? If some class is nib file's owner, what is the essential responsibilities of that class? Is it deserializing nib file into memory? Sorry for unorganized questions, I've been reading numerous articles and docs about nib files, but it is still confusing.

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  • Gruber URL Regex tweak to capture "domain.com"

    - by mootymoots
    I found an updated version of John Gruber's regex for url matching in this post by user GianPac, which states it's been adapted to recognize url without protocol or the www part: (?i)\b((?:[a-z][\w-]+:(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.-]+[.][a-z]{2,4}/?)(?:[^\s()<]+|(([^\s()<]+|(([^\s()<]+)))))(?:(([^\s()<]+|(([^\s()<]+))))|[^\s`!()[]{};:'\".,<?«»“”‘’])) Whilst this works in most cases, I found it does not match "google.com". It does match "google.comm" and "google.co.uk", so this must be a small oversight. The trouble is, I literally hate regex. It's the bane of my life. I just want to try and tweak this one more time to allow for "google.com" - can anyone throw me a pointer? I (think) it's something to do with this part of the code: +[.][a-z]{2,4}/?) ?

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  • Save UITextView content in NSString.

    - by camilo
    Hi, I'm trying to save the contents of an UITextView into a NSString which I will somehow persist later. The problem is that the UITextView "text" property doesn't save all the rows in the textView (after touching "return"). I tried print the TextView object and the textView.text, and they're different. Does anybody know how (after editing the textView) I can save its content into a String (or something else that I can later access and share through different views and persist in the database)? Thanks a lot. Pretty sure it is simple, but I'm honestly not finding the solution.

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  • Why does my app crash when I add an row to the table view?

    - by mystify
    I'm adding a row like this, when a button is pressed. It must be the very first row in the first section: NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0]; [self insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; I don't call anything else here. No -reloadData. I keep getting this: * Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of rows in section 0. The number of rows contained in an existing section after the update (6) must be equal to the number of rows contained in that section before the update (6), plus or minus the number of rows inserted or deleted from that section (1 inserted, 0 deleted).'

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  • How to assign optional attribute of NSManagedObject in a NSManagedObjectModel having Three NSManaged

    - by Kundan
    I am using coredata framework. In my NSManagedObjectModel i am using three entities that are Class, Student and Score where class and student have one-to-many & inverse relationship and Student and Score have also inverse but one-one relationship. Score entity has all optional attributes and having default '0' decimalVaue, which is not assigned at the time new Student is added. But later i want to assign them score individually and also to particular attribute not all of score attributes in a go. I am able to create and add Students to particular Class but dont have any idea how to call particular student and assign them score. For example I want to assign Score'attribute "dribbling" [there are many attributes like "tackling"] a decimal value to Student "David" of Class "Soccer" ,how i can do that? Thanks in advance for any suggestion.

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  • how to push one view to another view?

    - by MD
    In my application there are two view.First view na dsecond view. In my second view there is one time for 60 sec.When i go first view to second view then timr is start.when i back to first view thne timer is running in background.when timer is over then one popup is generated.When i click on pop up(ok button) then i want to go in second view.Acctully pop is in second view. How to solve this problem

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