Graphics Libraries

Drawing stuff directly in ios gets a bit slow as soon as you have more than a few images onscreen. So we should use a library like:

Cocos 2d tutorial
Cocos 2d with Box2d tutorial

For the more hard core there is Open GL

For full cross platform 3D goodness at a minimum $400 price tag (plus you'd need a copy of Maya) there is the rather awesome looking: Unity

Controllers

How to replace the current controller with a new one. In this case GameController

GameController *c = [[GameController alloc] initWithNibName:@"GameController" bundle:nil];
[self presentModalViewController:c animated:YES];
[c release];

For a navigatable version with back functionality:

[self.navigationController pushViewController:c animated:YES];

App Store submission

Unlike the Android Market the Apple App Store submission is a pain in the backside. Here are my notes from repeatedly failing at it:

Setup your app details in Itunes Connect. Your bundle ID should look something like this: com.nuclearcarrot.oystererrors

Next manage your certificates and profiles at apple developer
Go to Provisioning. Create a Distribution Profile (Note a Developer Profile). Can not use a Wildcard AppId for this.

Your appid should look like this: 1234123456.com.nuclearcarrot.oystererrors

Download this baby and drag it into XCode.

Xcode Project -> Build Settings -> Code Signing and configure it as Iphone Distribution.

Links

How to change font

Xcode shortcuts:

Check if Running on Simulator

How to add an if to check if you are running on the simulator:


#if TARGET_IPHONE_SIMULATOR
   NSLog(@"APPIRATER NOTE: not supported on the iOS simulator.");
#else
   // Do Live stuff
#endif


Source

Core Data schema change migration

Place the below in your:

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
method


To remove the old data store (clear out old data models):

[[NSFileManager defaultManager] removeItemAtURL:storeURL error:nil];


To migrate data using Lightweight Migration


[NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:YES],NSMigratePersistentStoresAutomaticallyOption, [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil];


In Xcode 4 we migrate data models by:
select data model. (on left)
Apple - alt - 1 ( View - Utilities - File Inspector)
Versioned Data model (on right side of utilities window)

Camera + Action Sheets Basics

Header should implement:

@interface CapturedPhotoController : UIViewController <UINavigationControllerDelegate, UIImagePickerControllerDelegate, UIActionSheetDelegate> {


and then we paste these methods into the main file:



- (IBAction) takePictureButton: (id) sender {
NSLog(@"snap");

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
NSLog(@"is camera ok");
UIActionSheet *photoSourceSheet = [[UIActionSheet alloc] initWithTitle:@"Select fugitive picture"
delegate:self
cancelButtonTitle:@"cancel"
destructiveButtonTitle:nil
otherButtonTitles:@"Take new photo", @"Choose existing photo", nil, nil];

[photoSourceSheet showInView:self.view];
[photoSourceSheet release];
}
else {
NSLog(@"No camera");
UIImagePickerController* picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.delegate = self;
picker.allowsEditing = YES;
[self presentModalViewController:picker animated:YES];
}
}

-(void) actionSheet:(UIActionSheet *) actionShet didDismissWithButtonIndex:(NSInteger)buttonIndex {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;

switch(buttonIndex) {
case 0:
NSLog(@"user wants to take new picture");
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.delegate = self;
picker.allowsEditing= YES;
break;
case 1:
NSLog(@"user wants to choose existing picture");
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
break;
default:
[picker release];
return;
}
[self presentModalViewController:picker animated:YES];

}

-(void) imagePickerController:(UIImagePickerController *) picker
didFinishPickingImage:(UIImage*) image
editingInfo:(NSDictionary*) editingInfo {
self.fugitive.image = UIImagePNGRepresentation(image);
[self dismissModalViewControllerAnimated:YES];
[picker release];
}