SKScene: bounds of scene - ios

Question

How can I get the bound of scene?
I'm testing with demo and I initialize scene in this way:
GameScene *scene = [GameScene unarchiveFromFile:#"GameScene"];
scene.scaleMode = SKSceneScaleModeAspectFill;
So, when I tap on screen I log:
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
for (UITouch *touch in touches) {
CGPoint location = [touch locationInNode: self];
NSLog(#"%f, %f", location.x, location.y);
}
}
When I press left-bottom I get circa 300-0 while I'm expecting 0-0.
How can I get the top-bottom-left-right bounds? I can't find a method like:
[scene getBounds]
Scene.frame prints: (0,0,1024,768) that not corresponds!!

Answer 1

You need to set the size of the GameScene to be equal to the size of its SKView. You can either do this in the didMoveToView of your GameScene:
-(void)didMoveToView:(SKView *)view {
[super didMoveToView: view];
self.size = view.bounds.size;
}
Or, you can set the size when you instantiate your GameScene:
SKView * skView = (SKView *)self.view;
// ...
GameScene *scene = [GameScene unarchiveFromFile:#"GameScene"];
scene.scaleMode = SKSceneScaleModeAspectFill;
scene.size = skView.bounds.size;
[skView presentScene:scene];

Answer 2

Initialize scene like this:
GameScene *scene = [GameScene sceneWithSize:skView.bounds.size];
scene.scaleMode = SKSceneScaleModeAspectFill;
Test coordinates like this:
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
/* Pressed node */
SKNode *node = [self nodeAtPoint:location];
NSLog(#"x - %f; y - %f", location.x, location.y);
}