Ciphers/Extensions.swift at main · balkarjun/Ciphers · GitHub

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//
//  View+Extensions.swift
//  Ciphers
//
//  Created by Arjun B on 03/04/23.
//

import SwiftUI

import Foundation
import SwiftUI

extension View {
    func measureSize(perform action: @escaping (CGSize) -> Void) -> some View {
      self.modifier(MeasureSizeModifier())
        .onPreferenceChange(SizePreferenceKey.self, perform: action)
    }
}

struct SizePreferenceKey: PreferenceKey {
  static var defaultValue: CGSize = .zero

  static func reduce(value: inout CGSize, nextValue: () -> CGSize) {
    value = nextValue()
  }
}

struct MeasureSizeModifier: ViewModifier {
  func body(content: Content) -> some View {
    content.background(GeometryReader { geometry in
        Color.clear.preference(key: SizePreferenceKey.self, value: geometry.size)
    })
  }
}