Objective C Make message to nil generate run time error
Is it possible to make messages sent to nil generate some sort of error in run time? I want it for the debugging purpose. ...
objective-c
- (void)applicationWillTerminate:(UIApplication *)application
I found this method in a delegate file and inserted some code. The code never gets executed, even when the home button is pressed. When or how does this function get called? ...
- (void)applicationDidEnterBackground:(UIApplication *)application
I inserted an NSLog and a UIAlertView into this function call. When I pressed the home button, the NSLog executed, but not the UIAlertView. Why is that? ...
Fire Effect opengl iphone
Hello any one knows a good tutorial where i can find a pointer to fire/flame effects on the iphone. i know i will have to use opengl but got no clue where to start. Cheers. ...
Release any retained subviews of the main view on iPhone
I saw this code in the project template and a few other sample projects. - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } Can someone explain to me what self.myOutlet = nil does? Does it release the memory? I thought you put [myOutlet release] ...
How do I store data securely with objective C? (Mac/Cocoa Dev)
I'm trying to create a Trial part of my cocoa application. I have the licensing all set up (including keys) etc. But I was wondering how I could store e.g the first the time the user ran the program in a secure place, where the user can't easily find it and/or edit it. I was having a fiddle with NSUserDefaults standardUserDefaults, but...
Combine and convert MP3 files using QTKit
Hi - I'm trying to combine two .mp3s into a single .wav file using QTKit. It seems to be working, but the last few seconds of the second file are getting truncated. Any ideas? - (IBAction)combineSelectedFilesAndOutputAsWAV { QTMovie *movie = [QTMovie movieWithFile:fileOne error:NULL]; [movie setAttribute:[NSNumber numberWithBoo...
Image scaling with UIImageView on iPhone
I have a custom view which is composed of a number of UIImageViews. These UIImageViews can vary in size (from 200x200 down to 50x50). The images that they display (loaded from png files) are stored in resources at the highest possible resolution (200x200), but frequently are displayed at lower resolutions. Currently I just load the UI...
ViewDidLoad super
In viewDidLoad do you put [super viewDidLoad] before or after your code? Is it the same for all other methods? ...
UIView Animations
Why doesn't this code do anything? [UIView beginAnimations:@"View Flip" context:nil]; [UIView setAnimationDuration:1]; [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; [UIView setAnimationTransition:UIViewAnimationCurveEaseIn forView:self.view cache:YES]; [self.view removeFromSuperview]; [UIView commitAnimations]; Also, where ...
Position of the vertex in Box2d
Hi How can i get position of the vertex in box2d ...
How to remove searchResultsTableView?
I have a UISearchDisplayController that displays some cells after a user has searched. After the user clicks on the cell, I am pushing a new view to my nav stack. How can I remove searchResultsTableView from the view so that when the user goes back, he doesn't see the searchResultsTableView? ...
Can you get a NSDictionary key from a value
Is there any way of getting a key value from an NSDictionary based on its value? I can get the value based on the key in several ways but I need to get at the key. Using the example below how would I be able to get the key if my value was QuestionType? NSDictionary *question = [NSDictionary dictionaryWithObjectsAndKeys: ...
how to make handler method run 1st in Objective-C
Hello, In the below method calls from a single object, how to make the handler method to run 1st and then the main method in Objective-C? Does it run in Asynchonous or Synchronous way? Main method :AuthenticateMobileServer handler Method :Handler [mobile_Obj authenticateMobileServer:self action:@selector(handler:)]; Thank You...
play iphone audio at constant volume
I am using AudioQueue Services to play audio in my app (AQPlayer borrowed from Speak Here) and I would like to know if it is possible to play the audio at a constant volume regardless of the iphone hardware volume. Apple's phone.app keypad is an example of this, the tones play at the same volume regardless of your hardware volume. ...
capture video of iphone4 in objective c using xcode
Good Day! i would like to know some tutorial or link or any help regarding how to capture video with sound using xcode 3.2.3. Any help in this regard is appreciated Regards ...
Setting Default Value of NSDate to Today.
In my Core Data model I have a property which is a NSDate, the user can change it and it is optional. I would like to set this property's default value as today, I saw no way to do this in the Core Data Model so I subclassed NSManangedObject and added this code to the implementation file. - (NSDate *)date { return [NSDate date]; } ...
Why do we use int sqlite3_bind_int(sqlite3_stmt*, int, int) in objective c?
What is the meaning of this in Objective C? int sqlite3_bind_int(sqlite3_stmt*, int, int) ...
pdf page fliping
I want to flip the pdf pages on iphone. I load the pdf file on iphone but it is scrolling I want to flip pdf pages... please give me any helo ...
Problem with camera Integration.
My aim is take the photo from the camera and need to save it in the camera roll. For that the code I wrote is: - (BOOL)startCameraPickerFromViewController:(UIViewController*)controller usingDelegate:(id<UIImagePickerControllerDelegate>)delegateObject { isCamera = YES; if ([UIImagePickerController isSourceTypeAvailable:UIImagePicker...