Hey there! This is a super common pitfall when building SpriteKit games for multiple iOS devices—let’s break down why your borders (and even the default Hello World label) are looking stretched/magnified on iPads or iPhone X-style devices, and fix it step by step.

Why This Happens #

Your current code relies on frame (the scene’s rendered size in the view) and hardcoded values like 30 or 20, plus inconsistent use of self.frame vs self.size. Combine that with a default SpriteKit scale mode that doesn’t preserve your game’s aspect ratio, and you get the wonky display across different screens. The Hello World label is affected because it’s tied to the same scaling issue.

Step-by-Step Fixes #

1. Set the Right Scene Scale Mode #

First, make sure your SKScene uses a scale mode that keeps your game’s aspect ratio consistent. In your view controller where you present the scene, add:

// Define a fixed logical scene size (e.g., iPhone 8's resolution for consistency)
let sceneSize = CGSize(width: 750, height: 1334)
let scene = YourScene(size: sceneSize)

// Choose a scale mode that fits your needs
scene.scaleMode = .aspectFill // Fills the screen, crops edges if needed (great for full-screen games)
// OR scene.scaleMode = .aspectFit // Fits the scene in the view, adds letterboxing if ratios don't match

Using a fixed logical size ensures your layout calculations work the same across every device.

2. Refactor Your Border Code for Device Agnosticism #

Replace hardcoded values and frame references with relative calculations based on the scene’s size (not frame). Here’s the adjusted crwalls() function:

func crwalls() {
    let wallThickness: CGFloat = 20
    let horizontalPadding = size.width * 0.04 // Replace hardcoded 30 with relative padding
    
    // Left Wall
    let leftWall = SKSpriteNode(imageNamed: "liiine")
    leftWall.size = CGSize(width: wallThickness, height: size.height * 0.67) // 1/1.5 = ~0.67 for consistent height
    leftWall.position = CGPoint(x: size.minX + horizontalPadding + wallThickness/2, 
                                y: size.midY)
    leftWall.physicsBody = SKPhysicsBody(rectangleOf: leftWall.size)
    leftWall.physicsBody?.isDynamic = false
    addChild(leftWall)
    
    // Right Wall
    let rightWall = SKSpriteNode(imageNamed: "liiine")
    rightWall.size = CGSize(width: wallThickness, height: size.height * 0.67)
    rightWall.position = CGPoint(x: size.maxX - horizontalPadding - wallThickness/2, 
                                 y: size.midY)
    rightWall.physicsBody = SKPhysicsBody(rectangleOf: rightWall.size)
    rightWall.physicsBody?.isDynamic = false
    addChild(rightWall)
    
    // Top Wall
    let topWall = SKSpriteNode(imageNamed: "liiine")
    let topWallWidth = size.width - (horizontalPadding * 2)
    topWall.size = CGSize(width: topWallWidth, height: wallThickness)
    topWall.position = CGPoint(x: size.midX, 
                               y: size.maxY - horizontalPadding - wallThickness/2)
    topWall.physicsBody = SKPhysicsBody(rectangleOf: topWall.size)
    topWall.physicsBody?.isDynamic = false
    addChild(topWall)
    
    print("Borders added successfully!")
}

Key improvements:

• Uses size (the scene’s logical size) instead of frame for all calculations
• Replaces hardcoded padding with a relative value (size.width * 0.04) that scales with screen size
• Removes the confusing self.size.width/4 offset on vertical walls (this was throwing off positioning on wider screens like iPads)
• Centers walls properly relative to the scene’s edges

3. Handle Notch Devices (iPhone X+) #

To make sure your top wall doesn’t get hidden under the notch, pass the safe area inset from your view controller to the scene:

// In your view controller
scene.safeAreaTopInset = view.safeAreaInsets.top

// Add this property to your scene class
var safeAreaTopInset: CGFloat = 0

// Then adjust the top wall position in crwalls()
topWall.position = CGPoint(x: size.midX, 
                           y: size.maxY - horizontalPadding - wallThickness/2 - safeAreaTopInset)

Final Checks #

• Update your Hello World label to use position relative to size.midX and size.midY instead of frame coordinates
• Test on multiple simulators (iPhone 8, iPhone 14, iPad) to confirm the layout stays consistent

内容的提问来源于stack exchange，提问作者Heyguyz