objective-c

How to access data from one view to another view?

I have an UITabBarController with two tabs: UINavigationController OptionsViewController : UIViewController How can I reach data (ie. UILabel.text) set in OptionsViewController, in a new added modal View which has been invoked from UINavigationController? Edit1: Scenario: After launching app I select the second tab bar called "Opt...

How do I add a checkmark to a table view?

I've put in this code: - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell * tableCell = [self.tableView cellForRowAtIndexPath:indexPath]; tableCell.accessoryType = UITableViewCellAccessoryCheckmark; [tableView deselectRowAtIndexPath:(NSIndexPath *)indexPath anim...

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

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 ju...

How to manually add Core Data to project?

E.g. what "Use Core Data for storage" checkbox option means when creating new Window or Navigation based project? How to add Core Data for Tab Bar Application? How to initialize managedObjectModel, managedObjectContext, persistentStoreCoordinator? ...

Loading different portrait/landscape UIViews

Hi, I have following View COntroller structure: ScrollViewController LandscapeViewController PortraitViewController Each with its own .nib The app starts in landscape mode where many landscape views are added to a scrollview. Each landscape view has its specific portrait view, so I have to assign like ID's to each of this views. Can ...

How can I convert RGB hex string into UIColor in objective-c?

I have color values coming from the url data is like this, "#ff33cc". How can I convert this value into UIColor? I am attempting with the following lines of code. I am not getting the value for baseColor1 right. Looks like I should take that pound char off. Is there another way to do it? NSScanner *scanner2 = [NSScanner scannerWithStrin...

UITabBarController and selectedIndex

didSelectViewController is not being fired when selectedIndex is set programmatically on UITabBarController object, when tapping manually everything works fine. ...

Objective-C woes: cellForRowAtIndexPath crashes.

I want to the user to be able to search for a record in a DB. The fetch and the results returned work perfectly. I am having a hard time setting the UItableview to display the result tho. The application continually crashes at cellForRowAtIndexPath. Please, someone help before I have a heart attack over here. Thank you. @implementation ...

Converting a CGRect of a object in a subview in UITableViewCell in UITable to CGRect with respect to self.view

Hey, I want to converte a CGRect "aRect" of a object in a subview in UITableViewCell in UITable to CGRect with respect to self.view. The problem is that aRect is with respect to the subview in the table cell. But i want to make it so that it is with respect to self.view What i tried is this rect = [self.view convertRect:aRect.frame to...

TableView frame not resizing properly when pushing a new view controller and the keyboard is hiding

Hi, I must be missing something fundamental here. I have a UITableView inside of a NavigationViewController. When a table row is selected in the UITableView (using tableView:didSelectRowAtIndexPath:) I call pushViewController to display a different view controller. The new view controller appears correctly, but when I pop that view cont...

Mutability design patterns in Objective C and C++

Having recently done some development for iPhone, I've come to notice an interesting design pattern used a lot in the iPhone SDK, regarding object mutability. It seems the typical approach there is to define an immutable class NSFoo, and then derive from it a mutable descendant NSMutableFoo. Generally, the NSFoo class defines data membe...

UINavigationController inside tabbar loading a child root view

Hi guys, Firstly i'll preface by saying that i am a complete Cocoa touch/objective c noob (.Net dev having a dabble) I have searched on Google as well as here but cannot seem to find an easy solution. I have a UItabbarcontroller view with a UINavigationController inside its first tab I have the root view for this UINavigationControll...

Code Signing Services

I'm developing a System Preference Pane that runs a background application. I'm planning on codesigning the background application and I'll be using the kill flag of codesign (http://gemma.apple.com/mac/library/documentation/Darwin/Reference/ManPages/man1/codesign.1.html). From my understanding, this kill flag will not allow the backgrou...

Want to learn Objective-C but syntax is very confusing

Coming from Java background I am guessing this is expected. I would really love to learn Objective-C and start developing Mac apps, but the syntax is just killing me. For example: -(void) setNumerator: (int) n { numerator = n; } What is that dash for and why is followed by void in parenthesis? I've never seen void in parenthesis...

A way to enable a LaunchDaemon to output sound?

I have a small Foundation application that checks a website and plays a sound if it sees a certain value. This application successfully plays a sound when I run it as my user from the Terminal. I've configured this app to run as a LaunchDaemon, with the following plist: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//...

How to set view outlet for a UIViewController that contains a UITabBarController?

I have a UIViewController that contains a UITabbarController which contains a UINavigationController. When I am setting up my IB outlets, what should the File's Owner view outlet be set to? ...

Is there a good UITabBarController Example?

Is there a good UITabBarController example where it is NOT created in the appDelegate? I would like to use a UITabBarController inside of a UIViewController, however dont know how to set the view outlet. ...

Is it possible to push a UITabbarController from a UINavigationController?

I have a UITabBarController that is loading a UINavigationController. When I push a new view controller, is it possible to change the UITabBarController to a new set of tabs? ...

Finding out whether an object exists within a plist?

If I have a plist which I have put into and array, which looks something like this -Root -Item 0 Dictionary Name String Henry Kids Array -Item 0 String Lindy -Item 1 String Paul -Item 1 Dictionary Name String Janet Pets ...

NSMutableDictionary memory / address problem, release does not work?

I am trying to create a NSMutableDictionary(dictA) with objectA. When I try to view my dictionary(NSLog), each key is pointing to the same address. I have an objectA_1 which is type objectA and used to setup the dictionary. Also, if I try to getObject, I always get the last key/value that was added to the dictionary. I tried setValue...