cocoa-touch

My Iphone App crashes (Bad access) when turned on it's side (landscape mode).

For some reason, every time I run my Iphone App, the App works fine as long as it is upright. The second the simulator turns to the left or right (like if I manually turn it, or if it's trying to play a video), the code crashes, with either a "Bad Access" or an exception. The crazy thing is that this stuff was JUST working, and I didn't...

Disappearing my view in a really strange way using animation and a timer. How can I improve this?

- (void) hideMenu { UIView *currentView = [self view]; [UIView beginAnimations:nil context: nil]; [UIView setAnimationDuration: 0.5]; [currentView setFrame:CGRectMake(0, 480, [currentView bounds].size.width, [currentView bounds].size.height)]; [UIView commitAnimations]; self.timer = [NSTimer scheduledTimerWithTimeInterval:(....

How to determine what the prior visibleViewController in UINavigationControllers?

I'm switching views in the context of a navigation view heirarchy, and I want to be able to determine at switch time what the prior view was that is being pushed under the new view. I'm trying this in a UINavigationControllerDelegate: (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIVi...

Is this set of time constants correct or is there a better built-in source in Cocoa

For working with time interval calculations on iPhone and looking at some component values. #define kSecondsInYear 31556926 #define kSecondsInMonth 2629744 #define kSecondsInDay 86400 #define kSecondsInHour 3600 #define kSecondsInMinute 60 I got these from Google's conversion function. I rounded Seconds in Month to nearest int. ...

Problem with facebook login page and iphone keybord?

Hi All, I am developing a game in cocos2d in which I have to connect my iphone game with face-book. for that I have code FBLoginButton *button=[[[FBLoginButton alloc]init] autorelease]; [[[Director sharedDirector]openGLView] addSubview :button] ; when I click on button face-book login page is display. when I click on Username t...

UIImagePickerController and extracting EXIF data from existing photos

It's well known that UIImagePickerController doesn't return the metadata of the photo after selection. However, a couple of apps in the app store (Mobile Fotos, PixelPipe) seem to be able to read the original files and the EXIF data stored within them, enabling the app to extract the geodata from the selected photo. They seem to do this...

Iphone - is controller freed after push?

is my UIViewController freed when i call another controller ? How to release memory of controller when i push to another controller ? i take more than 40Mo and application leave because of LOW MEMORY(No leak). [self.navigationController pushViewController:[[MainListController alloc] init:self] animated:NO]; @interface MainListControlle...

How to fix this touch event performance problem?

I am tracking a touch sequence on a view. The view is in an hierarchy of 3 other views, and nothing is covering it. When touches begin, until touches moved, I get an delay of 0.2 seconds. all following touchesMoved have a small delay of only 0.01 seconds. - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { lastTime =...

iPhone: make a call

Hi, Is there a way for my app to call a certain number and to play a certain sound? Thanks. ...

Animating a view on top of another view

I want to animate a view on top of another view in my iphone app. I basically want my view to look like the apple keyboard except with my custom controls. When i click a button I want the new view to animate up, from the bottom of the screen, on top of part of the view. How would I do this? ...

Is it possible to pull for touch points immediately after touchesBegan: gets called?

Problably you know that iPhone OS makes an artifical delay of about 0.25 seconds after an touchesBegan: occures. This is to check if the user intends to move or not. If the deltas move significantly enough during this time, a touchesMoved: sequence starts. But when you want to implement tactile touch behaviour in your app, you may not w...

audio on iPhone

Hi, How can I do the following things with iPhone sdk: 1. Access built in microphone, get amplitude of a sound. 2. Record sound from microphone into a file. 3. Playback the audio recorded from the microphone. Thank you in advance. ...

Changing text of copy&paste buttons

Hi there! I would like to localize my app but I can't figure how to change text in copy and paste and other other buttons. I tried to google but that is way too much irrelevant info about iphone copy/paste :/ any help is greatly appreciated ...

AVAudioRecorder: peak and average power

Hi, What is the difference between peakPowerForChannel and averagePowerForChannel methods of AVAudioRecorder? And why is the value returned is negative? Isn't it supposed to be 0 for no sound and go up when the amplitude of sound rises? How can I convert to a more "readable" format? Thanks. ...

image loading problem in iPhone ? - from webservice

imgBiteSpot.clipsToBounds=YES; NSData *imageData = [[[NSData alloc]init]autorelease]; imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:ObjBitSpot.StrImagePath]]; if(imageData==0) { imgBiteSpot.image=[UIImage imageNamed:@"img-not-found.gif"]; } else { UIImage *imgs = [[UIImage alloc] initWi...

Categories for NSMutableString and NSString causing binding confusion?

Hi, I have extended both NSString and NSMutableString with some convenience methods using categories. These added methods have the same name, but have different implementations. For e.g., I have implemented the ruby "strip" function that removes space characters at the endpoints for both but for NSString it returns a new string, and fo...

Problems with IBOutlet getting nil.

I have an instance of a class "A" in my EAGLView class, it gets instantiated in the EAGLView's initWithCoder method. This class "A" contains an IBOutlet to a UIView. I also have an instance of this class "A" in the Interface Builder, to connect the class "A" IBOutlet to the corresponding view. So the class "A" is being instanciated t...

NSXMLParser Encoded by Windows-1252

So NSXMLParser has problems parsing strings using the Windows-1252 encoder. Now I did find a solution on this page to convert it to NSUTF8StringEncoding. But now it bumps into characters it can't parse. So I figured out that it will work if I would escape special characters and then transfer it back after parsing it. For example: strin...

What are the ways to share data from an app?

Hi, I want to create a camera application. What are the available ways to share photos that were taken from my app? Email a photo? Send it via bluetooth? Probably a user can upload it to his computer? How can I implement them? Thanks. ...

iPhone - UIImagePickerController - How to allow user to pick the source?

Hello, I'm writing an application that uses UIImagePickerController. I'd like to give users choice of source of pictures, either take a new photo or choose from existing ones. I'd like to create exactly the same selection interface as is in twitterfon or in safari when you hold tap on the link. It looks like some standard SDK thing but ...