insidegui

struct ScrollViewOffsetPreferenceKey: PreferenceKey {
    static var defaultValue: CGPoint = .zero
    
    static func reduce(value: inout CGPoint, nextValue: () -> CGPoint) {
        value = nextValue()
        print("value = \(value)")
    }
    
    typealias Value = CGPoint

frankfka

import SwiftUI
import PlaygroundSupport


extension Double {
    func toRadians() -> Double {
        return self * Double.pi / 180
    }
    func toCGFloat() -> CGFloat {
        return CGFloat(self)