I want to modify the size of SKScene but I have figure out how to do it. I have figure out how change the size but it square taking the smallest size of the screen:
func makeScene() -> SKScene {
let minimumDimension = min(view.frame.width, view.frame.height)
let size = CGSize(width: minimumDimension, height: minimumDimension)
let scene = SKScene(size: size)
scene.backgroundColor = .white
return scene
}
Any of you knows how can I modify SKScene size (frame) programmatically ?
I'll really appreciate your help.
To modify the GameScene screen size, you can set go to GameScene.swift, and set the values.
self.size = CGSize(width: 100, height: 100)
Over here I have set the GameScene size to be 100 X 100. You can also change these values in the GameScene.sks, but the value stated in the code would over write it.
Related
I'm stuck at the Consolidation IV challenge from hackingwithswift.com.
Right now I'm trying to create a hangman game. I thought to place placeholder labels based on the length of the answer word. These placeholder labels would be placed inside a frame, which then would be placed in the center of the main view.
Unfortunately, the leading edge of the frame is placed centered. In my opinion, this is not a problem of constraints, but rather a problem of me creating the frame wrong.
My current code is
import UIKit
class ViewController: UIViewController {
var answer: String!
override func viewDidLoad() {
super.viewDidLoad()
// MARK: - declare all the labels here
let letterView = UIView()
letterView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(letterView)
// MARK: - set constraints to all labels, buttons etc.
NSLayoutConstraint.activate([
letterView.topAnchor.constraint(equalTo: view.layoutMarginsGuide.topAnchor),
letterView.centerXAnchor.constraint(equalTo: view.layoutMarginsGuide.centerXAnchor)
])
// MARK: - populate the letterView
// set the size of the placeholder
answer = "Atmosphäre"
let height = 60
let width = 25
// var width: Int
for placeholder in 0..<answer.count {
// create new label and give it a big font size
let placeholderLabel = UILabel()
placeholderLabel.text = "_"
placeholderLabel.font = UIFont.systemFont(ofSize: 36)
// calculate frame of this label
let frame = CGRect(x: placeholder * width, y: height, width: width, height: height)
placeholderLabel.frame = frame
// add label to the label view
letterView.addSubview(placeholderLabel)
}
}
}
The simulator screen looks just like this:
I already searched for answers on stackoverflow, but wasn't successful. I think I don't know what I'm exactly looking for.
The main problem, is that the letterView has no size, because no width or height constraints are applied to it.
To fix your code make the letterView big enough to contain the labels you've added as subviews by adding height and width constraints after the for loop:
for placeholder in 0..<answer.count {
...
}
NSLayoutConstraint.activate([
letterView.widthAnchor.constraint(equalToConstant: CGFloat(width * answer.count)),
letterView.heightAnchor.constraint(equalToConstant: CGFloat(height))
])
I'm not sure if you've covered this in your course yet, but a better way to go about this (which would take much less code), is to use a UIStackView as your letterView instead.
An extra thing to consider:
If you give the letterView a background color, you'll see that the labels are actually aligned outside of its bounds:
That's because you're setting each label's y position to be height, when it should probably be zero:
let frame = CGRect(x: placeholder * width, y: 0, width: width, height: height)
Correcting this places the labels within the bounds of the letterView:
So far, I have written the following code. Right now, it fills the screen because I set the width and height to specific values. This method, however, will not make the image the correct size on every other device. I am wondering if there is any way to change the size of an image so it automatically fills up the screen every time, on whatever device.
func backgroundScene() {
let constructionSite = SKSpriteNode(imageNamed: "Background Image")
constructionSite.size = CGSize(width: 425, height: 900)
constructionSite.position = CGPoint(x: frame.midX, y: frame.midY)
constructionSite.zPosition = -1
addChild(constructionSite)
}
I have the problem that the images I add are distorted. I have created a pixel accurate background for the iPhone X at (1125 x 2436), so I don't have to use .aspectFill and .aspectFit because I want a screen without black borders.
I use the following code to create the images:
func animateDeck() {
let chip = SKSpriteNode(imageNamed: "Chip")
chip.position = CGPoint(x: 300, y: 400)
chip.zPosition = 2
chip.setScale(1)
gameScene2.addChild(chip)
print("test")
}
Is there a way to display the images in their correct size without using .aspectFit or .aspectFill?
now (left) and how it should be (right)
Thank you in advance!
Check out this project I just made to show you how to create a texture and apply it to a node. All you need should be in GameScene.swift.
Also, in your ViewController, make sure that your GameScene is initialised properly as shown in my project, or how you did it with this:
gameScene2 = GameScene(size: view, bounds: size)
I'm trying to add a label to an ARKit project, but it's rendering extremely blurry. See image below:
Here's my code:
let shapeNode = SKShapeNode(rectOf: CGSize(width: 30, height: 30))
shapeNode.name = "bar"
shapeNode.fillColor = UIColor.white
let labelNode = SKLabelNode(text: "Hello world")
labelNode.horizontalAlignmentMode = .left
labelNode.verticalAlignmentMode = .top
labelNode.fontColor = UIColor.black
labelNode.fontSize = 3
When you create a SKScene for display, you have to give it a size. This is the resolution of what will be rendered. It will then be scaled to the SKSceneView it appears in, according to how you set its scaleMode property. If the resolution of your SKScene is lower than the point size of the view it appears in, the output will be adjusted to fit using a standard scaling algorithm and will therefore be blurry.
Try increasing the size of your SKScene by a little bit and see if that helps. Note that you will likely also have to adjust the size and position of your nodes as these will appear to shrink as the scene gets larger.
I found this extension online, it allows me to have images adhere to aspect fit/fill even when drawn inside dynamically growing/shrinking image views (currently when image is saved to camera roll after my draw function the image reverts to "scale fill" regardless of what the content mode of the image view is. I suspect the reasoning for this is because I have it drawing the image to size/bounds of the image view, but since the image view is dynamic, i don't see any way around this without using this extension):
// MARK: - Image Scaling.
extension UIImage {
/// Scales an image to fit within a bounds with a size governed by the passed size. Also keeps the aspect ratio.
/// Switch MIN to MAX for aspect fill instead of fit.
///
/// - parameter newSize: newSize the size of the bounds the image must fit within.
///
/// - returns: a new scaled image.
func scaleImageToSize(newSize: CGSize) -> UIImage {
var scaledImageRect = CGRect.zero
let aspectWidth = newSize.width/size.width
let aspectheight = newSize.height/size.height
let aspectRatio = max(aspectWidth, aspectheight)
scaledImageRect.size.width = size.width * aspectRatio;
scaledImageRect.size.height = size.height * aspectRatio;
scaledImageRect.origin.x = (newSize.width - scaledImageRect.size.width) / 2.0;
scaledImageRect.origin.y = (newSize.height - scaledImageRect.size.height) / 2.0;
UIGraphicsBeginImageContext(newSize)
draw(in: scaledImageRect)
let scaledImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return scaledImage!
}
}
This is my current function I'm using for drawing the image on screen to be able to save it to camera roll (this function combines two images, a frame and an image from camera roll:
func drawImagesAndText() {
let renderer = UIGraphicsImageRenderer(size: CGSize(width: imageView.bounds.size.width, height: imageView.bounds.size.height))
img = renderer.image { ctx in
// var newSize = currentImage.scaleImageToSize
let bgImage = currentImage
bgImage?.draw(in: CGRect(x: 0, y: 0, width: imageView.bounds.size.width, height: imageView.bounds.size.height))
frames = UIImage(named: framesAr)
frames?.draw(in: CGRect(x: 0, y: 0, width: imageView.bounds.size.width, height: imageView.bounds.size.height))
}
}
All the tutorials I've found on how to use extensions don't cover how to pass in and out variables like this one requires. Any insight would be greatly appreciated.
I understand that you don't know how to use the extension, is that correct? Since it just adds a function to every UIImage, you can simply call it on your image like this: currentImage.scaleImageToSize(newSize: someSize) and pass the size you want the image to fit into.
Dorian Roy was telling me to use that call in place of using just "currentImage", and that's what worked!
(I commented on his initial answer saying I was having issues because I was trying to use the return value from the extension itself in place of "currentImage")