ios – What’s the distinction for CGContext between the playground and the iPhone simulator?

XCode 13.4.1
Swift 5
Examined towards iPhone simulators 11,13

I am making an attempt to grasp why within the following operate ctx.makeImage() returns a sound picture within the playground however a 0 within the simulator. I am assuming it is one thing within the arguments to makeImage() however I am darned if I can determine what it’s. Any recommendations shall be gratefully acquired.

func loadImage() -> CGImage? {
    var srgbArray = [UInt32](repeating: 0xFF204080, rely: 512*512)
    _ = srgbArray.withUnsafeMutableBytes { (ptr) -> CGImage? in
        let ctx = CGContext(
            knowledge: ptr.baseAddress,
            width: 512,
            peak: 512,
            bitsPerComponent: 8,
            bytesPerRow: 4*512,
            house: CGColorSpace(identify: CGColorSpace.sRGB)!,
            bitmapInfo: CGBitmapInfo.byteOrder32Little.rawValue +
                CGImageAlphaInfo.premultipliedFirst.rawValue
            )!
        let cgImage = ctx.makeImage()
        print("cgImage", cgImage)
        return(nil)
    }
    return(nil)
}