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Swift: Class does not implement its superclass's required members

So I updated to Xcode 6 beta 5 today and noticed I received errors in nearly all of my subclasses of Apple's classes.

The error states:

Class 'x' does not implement its superclass's required members

Here is one example I picked because this class is currently pretty lightweight so it will be easy to post.

class InfoBar: SKSpriteNode  { //Error message here

    let team: Team
    let healthBar: SKSpriteNode

    init(team: Team, size: CGSize) {
        self.team = team
        if self.team == Team.TeamGood {
            healthBar = SKSpriteNode(color: UIColor.greenColor(), size:size)
        }
        else {
            healthBar = SKSpriteNode(color: UIColor.redColor(), size:size)
        }
        super.init(texture:nil, color: UIColor.darkGrayColor(), size: size)

        self.addChild(healthBar)

    }

}

So my question is, why am I receiving this error, and how can I fix it? What is it that I am not implementing? I'm calling a designated initializer.

How to add particle effects to an iOS App that is not a game using iOS 7 SpriteKit Particle?

I need to add a rain particle effect to my app, I have been having a tough time finding ways to actually execute this idea.

I tried following this CALayer approach tutorial : Link but I am not quite sure if this is the best approach, considering the new iOS 7 SpriteKit Particle Emitter available in Xcode 5.

I have already created the .sks file and it's in my Hierarchy, but I am still unable to add it to my storyboard / project.

With that being said, How exactly do I add a SpriteKit Particle (sks) to my view? I am not at all familiar with scenes, layering , etc in the SpriteKit framework as I am not a game developer. I need the most details and sample code possible so that I can figure this out please

UPDATE: I have followed the direction provided in an answer by fellow SO member: AyatollahAndy, please see his answer below. Although I was able to display the SKScene in my view the app crashes when any touch event is received. I get the following:

Thanks

Sprite Kit & playing sound leads to app termination

using ARC

Just a problem I've run into- I have an SKScene in which I play a sound fx using SKAction class method

[SKAction playSoundFileNamed:@"sound.wav" waitForCompletion:NO];

Now when I try to go to background, no matter that the sound was over, apparently iOS is terminating my app due to gpus_ReturnNotPermittedKillClient.

Now only when I comment this line and not running the action iOS runs it great in background (of course, paused, but without termination).

What am I doing wrong?

EDIT: iOS will not terminate the app if the line wasn't run- say, if it was in an if statement that wasn't run (soundOn == YES) or something like that, when the bool is false

ios Sprite Kit screengrab?

I am trying to get a screen grab of a view that has a SKScene in it. The technique I am using is:

UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, scale);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

This works great with normal UIViews, but for whatever reason it is ignoring all the sprites in the SKScene.

I'm not sure if this is a bug, or if Sprite Kit's rendering is separate from UIGraphics.

Question: How do I get a screen grab of an SKScene when the way that worked for UIViews seems to not work with Sprite Kit, or has anyone had success using UIGraphics context with Sprite Kit?

Physicsbody doesn't adhere to node's anchor point

My scene has a bunch of rectangles with physics bodies that are the same size as the rectangle. I like to anchor all of my objects to CGPointZero, however I've noticed when I do that the physicsbody remains anchored in the middle. In other words, the position of my physics body is like 100 pixels lower and to the left of the visual representation.

Here is a simple snippet of code:

SKSpriteNode* square = [SKSpriteNode spriteNodeWithColor:[SKColor blackColor] size:CGSizeMake(width, height)];
square.anchorPoint = CGPointZero; //position based on bottom-left corner
square.position = CGPointMake(x, y);

square.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(width, height)];

Any ideas or advice to solving this problem would be appreciated. For example, if I could visualize the physics bodies, that might help, but I'm not sure how to.

UPDATE: So I've solved the problem by simply not setting the anchor point and repositioning my rectangles. So the problem still exists, but I have a work around in place and the work around is working well.

SpriteKit's SKPhysicsBody with polygon helper tool

I wonder if there is a tool that could be used for easy generation of complex physics bodies in SpriteKit. I would like to have a volume based physical bodies with polygon-type shapes. SpriteKit allows to create such bodies with that method:

+ (SKPhysicsBody *)bodyWithPolygonFromPath:(CGPathRef)path

Unfortunately it's time consuming task to generate such paths manually, and it could be problematic when testing. There is a SpriteHelper application that allows you to define body shape within easy-to-use visual editor, but this app can't export paths that could be used here. It was made for cocos2d and it does a lot of things like texture packing etc. that I don't need and I can't use with SpriteKit. Does anyone know a solution that will allow to define CGPath's easily or maybe even auto-generate them from png images with alpha channel? Although auto-generation feature from my experience would need optimization, because the body shapes should be as simple as possible when textures could have more complicated shapes.

Is it possible to end an SKAction mid-action?

I have a subclass of SKSpriteNode (monsterNode). It automatically runs around the screen using vectors to follow the player. I am currently using the following action to make it run around:

SKAction *actionMove = [SKAction moveTo:actualDistance duration:time];
        [self runAction:actionMove completion:^ {
            _currentState = SVGMonsterStateIdle;
        }];

I am wondering if its possible to make it so the monsterNode actually STOPS running the action if it hits the boundary of the iOS device screen. I currently have SKSpriteNode boundaries on the edges of the screen, linked with a contact delegate to notify if the monster and walls make contact. However, that means nothing if I can't actually stop the monster's actionMove action from going to completion. The monster needs to stop at the boundaries of the screen. If it is not possible to stop an SKAction mid-execution, is there a roundabout way to do so?

Change texture on SKSpriteNode

I have an SKSpriteNode and I want to change the texture on it when the user touches the screen. But cannot work out how to do so.

Creating and adding the head. (Declared in header).

    head = [SKSpriteNode spriteNodeWithImageNamed:[NSString stringWithFormat:@"%@",face]];
    head.position = CGPointMake(size.width / 2, size.height / 2);
    [self addChild:head];

When a touch is detected, the below is run, but I cannot work out how to apply it to the SKSpritenode?!

            SKAction* changeFace = [SKAction setTexture:[SKTexture textureWithImageNamed:[NSString stringWithFormat:@"%@",face]]];
            [self runAction:changeFace];

I have tried the below also, but it does not seem to work...

            head.texture = [SKTexture textureWithImageNamed:[NSString stringWithFormat:@"%@",face]];

Hope somebody is able to point me in the correct direction!

SKSpriteNode - create a round corner node?

Is there a way to make a SKSpriteNode round cornered? I am trying to create a Tile likesqaure blocks with color filled SKSpriteNode:

SKSpriteNode *tile = [SKSpriteNode spriteNodeWithColor:[UIColor colorWithRed:0.0/255.0
                                                                           green:128.0/255.0
                                                                            blue:255.0/255.0
                                                                           alpha:1.0] size:CGSizeMake(30, 30)];

How can I make it round cornered?

Thanks!

Setting up buttons in SKScene

I'm discovering that UIButtons don't work very well with SKScene, So I'm attempting to subclass SKNode to make a button in SpriteKit.

The way I would like it to work is that if I initialize a button in SKScene and enable touch events, then the button will call a method in my SKScene when it is pressed.

I'd appreciate any advice that would lead me to finding the solution to this problem. Thanks.

How to bring a SKSpriteNode to front?

How can I bring a SKSpriteNode to the front of all other node?

With UIView, I can use bringSubviewToFront to bring an uiview in front of other views.

SKNode convertPoint toNode & fromNode confusion?

I am a little confused by how the SKNode methods convertPoint:fromNode: and convertPoint:ToNode: are working, I have looked at the docs but its not that obvious what they do. For example, this (see diagram below) is a small test I did using convertPoint:fromNode: The black area is the SKScene background, the blue area is an SKSpriteNode parented to the SKScene, the red area is another SKSpriteNode parented to the blue sprite. The anchor points for both sprites are shown by the small green dots. What I wanted to do was get the scene position for the red sprite, which I did using the following code:

CGPoint positionInScene = [self convertPoint:[self position] 
                                    fromNode:[self redSprite]];

The result from this is

positionInScene = [105, 205]

Which is what I expected, as that would be the origin of the red square in scene space. What I am confused about is the arguments. From what I can guess:

[SKNode_A convertPoint: CGPoint_B toNode: SKScene_C]

• SKNode_A = The node coordinate space to convert to ...
• CGPoint_B = The point to convert (not sure why its [self position] above)
• SKNode_C = The node coordinate space to convert from ...

My initial try at this was [self convertPoint:[redSprite position] fromNode:redSprite] because I was wanting to convert the red sprites origin to the scene. It just seems a bit clunky to get your head round, if anyone can cast a little light & logic on both this and its friend convertPoint:toNode: it would be very much appreciated.

Insert line break using SKLabelNode in SpriteKit

Simple question on how to insert a line break using SKLabelNode class in SpriteKit. I have the following code but it does not work -

 SKLabelNode *nerdText = [SKLabelNode labelNodeWithFontNamed:@"Times"];
    NSString *st1 = @"Test break";
    NSString *st2 = @"I want it to break";
    NSString *test = [NSString stringWithFormat:@"%@,\r%@",st1,st2]; //Even tried \n
    nerdText.text = test;
    nerdText.fontSize = 11;
    nerdText.fontColor = [SKColor colorWithRed:0.15 green:0.15 blue:0.3 alpha:1.0];
    nerdText.position = CGPointMake(150.0, 250.0);
    [self addChild:nerdText];

Please help me out!

Background image size Sprite Kit Game

i just started a new Sprite Kit project to learn how to use it. I watched and read a lot of tutorials but no tutorial has a answer for my question/problem.

I want to create an application just for my iPhone 5S. So the screen size is 1136x640. I created a 1136x640 background image for my application. But when i add the image to my app, its waaay to big! The iOS Simulator just displays the middle of the image.

Can someone tell me what screen size i have to use and why?

Thanks a lot!

Here is the code which i copied from a tutorial. The code is in the myScene.m file in the initWithSize method

        SKSpriteNode *background = [SKSpriteNode spriteNodeWithImageNamed:@"myBackground"];
    background.position = CGPointMake(CGRectGetMidX(self.frame),CGRectGetMidY(self.frame));

    [self addChild:background];

EDIT:

I searched on google and found this:

The viewDidLoad method has to be changed with "viewWillLayoutSubviews".

Here is this method:

    - (void)viewWillLayoutSubviews
    {
    [super viewWillLayoutSubviews];

    // Configure the view.
    SKView * skView = (SKView *)self.view;
    skView.showsFPS = YES;
    skView.showsNodeCount = YES;

    // Create and configure the scene.
    SKScene * scene = [MyScene sceneWithSize:CGSizeMake(skView.bounds.size.width*2,skView.bounds.size.height*2)];
    scene.scaleMode = SKSceneScaleModeAspectFill;

    // Present the scene.
    [skView presentScene:scene];
}

At first the scene = MySceneWithSize line was:

SKScene * scene = [MyScene sceneWithSize:skView.bounds.size];

But then it was just the half of the iPhone 5 screen size (568x320). So i had to double the size. Does somebody know why?

Dealing with different iOS device resolutions in SpriteKit

I'm playing around with SpriteKit in Xcode 6, iOS 8 beta 5. Everything is all laid out and working perfectly on the iPhone 4S simulator, however when switching to the 5S, the elements at the bottom of the screen are cut off.

It was to my understanding that the bottom left corner of the iPhone screen should be CGPoint(0, 0) but after checking the location by printing the coordinates to the console that the lowest point of the left corner I could click was around (5, 44). Is there something wrong in my scene setup thats causing this?

No changes have been made to the GameViewController file and even after I strip the GameScene file the problem persists.

Can anyone at least point me in the right direction with this?