Find screen resolution in Swift [duplicate]

Question

I am writing an iOS game in Swift using Spritekit and want to find the screen resolution to properly place my sprites. I found multiple ways on internet, but none of them is giving me a correct resolution that help me to place my sprites. The one that works fine for an iPhone 13 Pro is the following

screenSize=self.size
screenSize.width /= (UIScreen.main.bounds.height/screenSize.height) / (UIScreen.main.bounds.width/screenSize.width)

let background = SKSpriteNode(imageNamed: "Landscape.jpg")
background.position = CGPoint(x: 0, y: 0)
background.size = screenSize

If I use the recommended UIScreen.main.bounds, this is the outcome on an iPhone: But on an iPad for example, the dimensions are too big. Is there a unique way of finding screen resolution on all devices ? Or is there a scene scaling that enters in the equation ?

Answer 1

Try this:

// Get main screen bounds
let screenSize: CGRect = UIScreen.main.bounds

let screenWidth = screenSize.width
let screenHeight = screenSize.height

print("Screen width = \(screenWidth), screen height = \(screenHeight)")

this is output of iPone 13 pro simulator:

Screen width = 390.0, screen height = 844.0