I'm using a simple SKCropNode with a standard XCode Swift Game Template.
Everything works fine in an emulator, but on a real iPhone 4S with iOS 8.3 I see just a green mask (although my shape is red) - no texture sprite is being displayed.
The funny thing is that on iPhone 5S with iOS 9 everything works fine too. So the problem is with iPhone 4S or iOS 8.3
Here's a Screenshot of a problem
I've could update my device to iOS 9, but I was thinking about supporting iOS 8 users too.
Is that fixable, or is that an Apple bug?
Here's the code to reproduce, it's based on a standard SpriteKit Game Template from XCode:
let center = CGPoint(x: self.frame.width*0.5, y: self.frame.height*0.5)
let sprite = SKSpriteNode(imageNamed:"Spaceship")
sprite.position = center
let mask = SKShapeNode(rectOfSize: CGSize(width: 200, height: 200))
mask.fillColor = SKColor.redColor()
mask.position = center
let crop = SKCropNode()
crop.maskNode = mask
crop.addChild(sprite)
self.addChild(crop)
Related
I want to program a simple Sprite Kit game in which I have to place some nodes randomly somewhere in the scene.
To ensure that these nodes are not placed outside the safe area I programmed this function:
func updatesafearea() {
let frame = self.size
let sets = view!.safeAreaInsets
let rect = CGRect(x: -(frame.width/2)-sets.left,
y: -(frame.height/2)-sets.top,
width: frame.width-sets.right-sets.left,
height: frame.height-sets.top-sets.bottom)
//Visualize the area
let node = SKShapeNode(rect: rect)
node.fillColor = .red
addChild(node)
}
This should be a rect in which all nodes should be presented safely, but unfortunately this doesn't work on iPhone X (Simulator):
iPhone 8 and iPhone X simulator screenshot below:
Ok, so I've been trying to position a line on my iPhone 6s+ and my iPad 2. The line was added in an SKCamera (I don't know if that effects it or not). Here is the code for the line:
var leftWall = SKSpriteNode()
leftWall.size = CGSize(width: 1, height: 10000)
leftWall.position = CGPoint(x: 0, y: 0)
leftWall.color = UIColor.red
leftWall.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: leftWall.size.width, height: leftWall.size.height))
leftWall.physicsBody?.affectedByGravity = false
leftWall.physicsBody?.isDynamic = false
leftWall.physicsBody?.categoryBitMask = groundGroup
leftWall.physicsBody?.collisionBitMask = ballGroup
leftWall.physicsBody?.contactTestBitMask = 0
theCamera.addChild(leftWall)
Okay, so the x position is 0,0 right? Here is how it looks on my iPhone 6s+:
As you see, the line is in the middle?
Here is how it looks on my iPad 2:
I just don't understand why the position of the line is completely different.. Please help me!
You are not taking into account the cropping that happens on the iPad, or your scaleMode is all wrong
What you need to do is set all nodes anchor points (Including the scene) to (0.5,0.5), make sure your GameScene has a static size and not based on view.frame (750,1334 is a good one) and that your scale mode is set to .aspectFill. This makes (0,0) the center of the screen, and you will notice everything line up on all devices
I am a complete beginner at Swift 3 and programming in general so this will be an incredibly basic question.
I have been following tutorials and am currently positioning a SpriteNode using CGPoint. The tutorial recommends the following to position the Node centrally at the bottom of the screen:
Ground.position = CGPoint(x: self.frame.width / 2, y: 0)
However, that causes it to stick to the top-right of the screen.
When I use the following code:
Ground.position = CGPoint(x: 0 - self.frame.width / 2, y: 0 - self.frame.height / 2)
It positions at the bottom-centre as intended.
I do not understand why this happens as there is very little else done in the tutorial at this point to cause the error.
Set the anchorPoint of the scene to the bottom left corner at the beginning of your didMove(toView: SKView) (or in GameViewController):
scene.anchorPoint = CGPoint(x: 0, y: 0)
Keep in mind that everything you place on the scene is placed based on the anchorPoint. So with this anchorPoint, the origin of your scene is the bottom left corner.
Also note that if you're using .AspectFill as your sceneScaleMode, you don't have to use self.frame and instead set the scene size to 768x1024 (portrait)/ 1024x768 (landscape) then just use number values within the scene size.
Additionally, there are advantages of setting your scenes anchorPoint to the centre:
scene.anchorPoint = CGPoint(x: 0.5, y: 0.5)
This makes it easier to fit the scene into iPad size as well as iPhone, and also simplifies centering nodes.
See this link for more info on making your app universal: iOS Universal Device App with SpriteKit, how to scale nodes for all views?
I want to constrain and position a game center button to the top left and make it constrained for every device, how do I do this. I am really new to sprite kit.
let gameCenterBtn = SKSpriteNode(imageNamed: "Game-Center-icon.png")
gameCenterBtn.size = CGSize(width: 60, height: 60)
gameCenterBtn.name = "gameCenterButton"
gameCenterBtn.position = CGPointMake(320, 730)
gameCenterBtn.position = CGPoint(x: self.frame.width , y: self.frame.height )
For example how do I make a position a node and make it work for any device?
I figured it out. The code below works.
gameCenterBtn.position = CGPoint(x: CGRectGetMidX(self.frame) - 188 , y: CGRectGetMaxY(self.frame) - 25)
Scene cropping is still happening as I said in my old answer I deleted.
Open a brand new Xcode game template and paste your code with a position like this
gameCenterBtn.position = CGPoint(x: CGRectGetMaxX(self.frame) - (gameCenterButton.size.width / 2) , y: CGRectGetMidY(self.frame))
and run on all the simulators to see what happens.
On iPads you see half the image on the right and on iPhones you only see 1/4.
Now go the the GameViewController and change the scene scale mode to ResizeFill and see what happens. You sprits will be at the same spot on all devices but you will have to readjust the image size.
This is how you set the scene size.
How to change SKscene size
I originally created my game with iOS 8 and tested on my iPhone 6S. The game looks fine in the 5, 5S, 6, 6 Plus, 6S, and 6S Plus (since all devices have the same ratio of 16:9). As you can see from the image, the music button is offset from the top right corner. The image is offset by this code:
muteButton.position = CGPoint(x: CGRectGetMidX(self.frame) + 920, y: CGRectGetMidY(self.frame) + 480)
The problem I have is if someone tried this game on an iPad, it will display this. As you can see, the bottom graphic and the mute button are offset from the sides by a lot.
I want to make it so that the objects will always stay close to the sides of the frame/view. Making the app "universal" on xCode does not fix it either. Or do I just make a completely new project built for the iPad?
Don't forget about the 4s, you will get the same problems as iPad. SpriteKit does not have constraints like in the UI builder, so you are going to have to accommodate for the 4:3 and the 16:9 devices by applying some math, or force the 4:3 to be 16:9 with black borders using the .AspectFit scaling method.
Now I am not sure where 920, and 480 are coming from, but those numbers may have to be tweaked in this code when detecting the device. Simplest way to determine your aspect ration is to do UIScreen.mainScreen().bounds.width/UIScreen.mainScreen().bounds.height, then work from there.
Solution! I figured it out! For those who come from the future and also might need help with this. This works with landscape orientation and portrait orientation.
Note: You must have your scene.scaleMode set to .AspectFill for this to work on all scenes and the scene size has to be 2048x1536 or 1536x2048. This will make it scaleable for iPad too.
I have declared the following variable on the top of my class.
class StartScene: SKScene {
let playableArea: CGRect
}
Then, I have the following code inside the override init() function.
override init(size: CGSize) {
//1. Get the aspect ratio of the device
let deviceWidth = UIScreen.mainScreen().bounds.width
let deviceHeight = UIScreen.mainScreen().bounds.height
let maxAspectRatio: CGFloat = deviceWidth / deviceHeight
//2. For landscape orientation, use this*****
let playableHeight = size.width / maxAspectRatio
let playableMargin = (size.height - playableHeight) / 2.0
playableArea = CGRect(x: 0, y: playableMargin, width: size.width, height: playableHeight)
//3. For portrait orientation, use this*****
let playableWidth = size.height / maxAspectRatio
let playableMargin = (size.width - playableWidth) / 2.0
playableArea = CGRect(x: playableMargin, y: 0, width: playableWidth, height: size.height)
super.init(size: size)
}
From here, I then use the variable playableArea to position my objects.
titleChild.position = CGPoint(x: CGRectGetMidX(playableArea), y: CGRectGetMaxY(playableArea) - (titleChild.size.height * 0.90))
Works amazing. Looks good in the iPhone 4S, 5, 5S, 6, 6 Plus, 6S, 6S Plus, and iPads.
If you want to see the box in the app to make sure you did it right, use the following function.
func drawPlayableArea() {
let shape = SKShapeNode()
let path = CGPathCreateMutable()
CGPathAddRect(path, nil, playableArea)
shape.path = path
shape.strokeColor = SKColor.redColor()
shape.lineWidth = 8
addChild(shape)
}
Then just call the function in the didMoveToView() function to view the red frame to make sure you did the code right. This will create a red frame the size of the view that is viewable to the user. Now that you have playableArea to hold the frame that the user can see, you can use it for other things such as making sure objects don't or can't leave the bounds, etc. For this screenshot, I use it to prevent the user from moving the spaceship outside the device.