I am developing a sample game using SceneKit and Swift in Xcode, I added a ship node (default) and add some animations. The problem is that the sceneView does not fit the screen because the aspect ratio does not seems to bee 16:9 as the screen of an average iPhone screen size. How can I scale the sceneView to fit the screen?
I found out that the best way of solving this issue was to set the Launch Screen File = Main
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I am creating an iOS game using sprite kit scene. My sprite kit scenes are sit to a scale value of x = 1136 by y = 640, creating a horizontal game play. This resolution adjusts to all iPhones up to iPhone 8. However iPhone X and iPhone 11 have a different aspect ratio for their screen resolutions than the other iPhones. I was wondering if there is a setting or something that can be done programmatically to adjust the set game cg points and image sizes to adjust to the iPhone X and iPhone 11 without individually changing cg points of all images and image scales in code.
I figured it out. You can manually change the aspect ration to adjust to the device being used. To figure out the right aspect ratio you need use this link https://developer.apple.com/reference/spritekit/skscenescalemode
When creating my game in spriteKit I used the game size 1080x1920. Now however If I am to run it on Ipad it looks bizarre. Is there an easy fix? I am simply worried that my app will get rejected. Thank you in advance?
Its quite a commonly asked question.
What we usually do in SpriteKt is to give the SKScene a fixed size and let SpriteKit do the scaling for you on different devices.
So basically we have 2 ways to do it correctly
1) Set scene size to iPad (e.g 1024x768 -landscape, 768x1024 - portrait). This was the default setting in Xcode 7.
You than usually just have/show some extra background at the top/bottom (landscape) or left/right (portrait) on iPads which gets cropped on iPhones.
Examples of games that show more on iPads / crop on iPhones:
Altos Adventure, Leos Fortune, Limbo, The Line Zen, Modern Combat 5.
2) Apple changed the default scene size in xCode 8 to iPhone 6/7 (750*1334-Portait, 1334*750-Landscape). This setting will crop your game on iPads.
Examples of games that show less on iPads:
Lumino City, Robot Unicorn Attack
Choosing between those 2 options is up to you and depends what game you are making.
Regardless of scene size scale mode is usually best left at .aspectFill or .aspectFit, again depending on what you prefer and need (e.g cropping with aspectFill or black bars with aspectFit)
You would use the Universal asset slot and/or device specific images. This way you will have a consistent experience on all devices
Spritekit scale full game to iPad
How to make SKScene have fixed width?
Hope this helps
When you present the scene's you also set the aspect ratio.
example :
if let scene = SKScene(fileNamed: "GameScene") {
// Set the scale mode to scale to fit the window
scene.scaleMode = .aspectFill
// Present the scene
view.presentScene(scene)
}
There are 4 different aspect radios you can set
aspectFit
aspectFill
fill
resizeFill
You can find out about the 4 different types here in the apple documents.
It looks to me that you currently have it set to aspectFill but you would be better off using aspectFit. This will create a black bar on the top and bottom on some devices but it will keep the aspect ratio the same.
If you want it to look good on all devices(no black bar) you would need to check which device it is running on then update the size and position of your sprites accordingly.
Whenever scenes are hard coded, (not made within the editor) using .resizeFill will ensure that the width AND height of the scene ALWAYS conform to the view. So your game will scale correctly on any device. For scenes that are made within the editor, this is not the case.
Personally, I hardcoded all the levels in my game "Astro Path" (it's on the app store for reference) and used .resizeFill so it would scale correctly on any device without any cropping or black bars. (who wants that stuff yuck) For my title screens, I used:
.aspectFill on iPhone
.fill on iPad
because they were designed within the editor. I checked for the current device using: if UIDevice.current.userInterfaceIdiom == .pad { do w/e }
I am making a spriteKit based game and wonder if I can make the SKScene fixed width (to make it easier to layout the sprites), and let it resize to the actual screen width while keeping the aspect ratio. Is it possible to achieve this goal and is it recommended (will sprites not be rendered clearly due to resizing)?
Giving the scene a fixed size is actually what we want to do in SpriteKit games. SpriteKit will than scale the game for each device using the scaleMode settings (defaults to .aspectFill). Its not a good idea to make the scene the size of the device or use .resizeFill for scale mode as that will lead to massive inconsistencies on different devices. I have been there before with 1 game and it was an absolute nightmare.
So we basically have 2 ways to do it correctly
1) Set scene size to iPad (e.g 1024x768 -landscape, 768x1024 - portrait. This was the default setting in Xcode 7.
You than usually just show some extra background at the top/bottom (landscape) or left/right (portrait) on iPads.
Examples of games that show more on iPads:
Altos Adventure, Leos Fortune, Limbo, The Line Zen, Modern Combat 5.
2) Apple changed the default scene size in xCode 8 to iPhone 6/7 (750*1334-Portait, 1337*750-Landscape). This setting will crop your game on iPads.
Examples of games that show less on iPads:
Lumino City, Robot Unicorn Attack
Choosing between those 2 options is up to you and depends what game you are making. I usually prefer to use option 1 and show more background on iPads.
Regardless of scene size scale mode is usually best left at the default setting of .aspectFill. This way you will have a consistent experience on all devices.
I would not try to do some random hacks where you manually change scene or node sizes/scales on difference devices, you should let xCode/SpriteKit do it for you.
In code you would initialise a SKScene with your preferred size like so
let gameScene = GameScene(size: CGSize(width: 1024, height: 768))
If you use the visual scene editor you set the scene size directly in the inspector panel on the right.
Hope this helps
Any resizing comes with a performance penalty and resizing artifacts such as blurred edges or others.
Scene size is defined by the ViewController when it instantiates the scene before presenting it. Isn't it better to create the scene with the same size as the actual screen size and don't resize it any further?
Is there a bug in SKCameraNode when used with .AspectFill on devices where the aspect ratio of the SKScene does not match that of the devices view?
I have a minimal demo of the issue I see: an SKScene created in an SKS file, to be 768w x 1024h, filled with an image (also 768w x 1024h). It's loaded with .AspectFill. An SKLabel is positioned in the middle of the scene programmatically. The demo is simply the out-of-the-box iOS template for a SpriteKit game, with a background image added.
An iPad in Portrait (so 768w x 1024h) displays this fine. An iPhone 6+ in Portrait (414w x 736h) displays fine. An iPhone 5S (320w x 568h) displays fine.
If I add a camera to the scene, position it in the middle by setting its coordinates to (384, 512) in the SKS file and set the scene to use it, the iPad is fine but now the iPhones (and any other device with a aspect ratio other than 3:4) does NOT work. It displays the right-hand side of the scene. It is not centered. Screen shot from the iPhone below.
The camera being in the middle of the scene, should ALWAYS work.
I am currently using a work-around. When you use .AspectFill the sides of the scene are cropped by an amount - let's call it cropAmount - to fit on the narrower screen. The work-around is to move the camera left, so it is off-center by cropAmount, then the scene displays correctly.
The background image here is an #3x of a 768w x 1024h background for my game. I've put in green the cropAmount corresponding to the SKView for 9:16, and in red the scene bounds. Given the camera is set in the middle of the scene, same as the label and the pink dot in the middle of the image, why is the center of the view not also there?
If this is a bug, and I leave in my "fix" where I offset the camera by cropAmount, later updates could break production code running on devices.
Also I am not using .ResizeFill as it doesn't fix the camera node issue, and would also mean that the assets are incorrectly sized and positioned in the scene for the thousands of lines of code and dozens of SKS files I already have over 6 months of work.
Question has been edited. Originally I had my "fix" added as an extension but this just caused confusion so I have removed it.
I am trying to make a game using sprite kit that works on both iPhone and iPad.
For iPhones I can set the scene size to 320x568 and scale it for all resolutions it works fine.
For iPads too this works fine. But as the point resolution on iPad is 768x1024 I can see scaling artifacts and also images are not sharp.
So I want to set the scene size to 768x1024 for iPads. Most of my game images are drawn using sprite kit instead of loading images. So when I set the new scene size the images look smaller.
What would be the best way to specify the correct dimensions for the images while drawing it? Would I have to convert each and every dimensions and points used based on the device type?
You can draw your images using the largest screen size and scale them down to fit smaller screen sizes. This works well if the aspect ratio is the same for devices like iPhone 5, 6 and 6+. You do have to create separate images and/or screen layouts for the iPad and iPhone 4 which have a different aspect ratio.