Blog post: SwiftUI with UICollectionView - 14. Do not use @State inside of a SwiftUI View embedded in a UICollectionViewCell

swiftui-card-view-with-state.swift

import SwiftUI

struct Card: View {
    
    typealias Content = CardContent
    
    let content: Content
    
    @State var isHearted: Bool = false
    
    var body: some View {
        ZStack(alignment: .topTrailing) {
            VStack(alignment: .leading, spacing: 8) {
                Image(content.imageName)
                    .fitToAspectRatio(3/2) // https://gist.github.com/karigrooms/fdf435274f4403abd57b1ed533dcea53
                    .clipShape(RoundedRectangle(cornerRadius: 4))

                Text(content.title)
                    .font(.headline)

                Text(content.description)
                    .font(.body)
                    .lineLimit(1)
            }
            
            HeartButton(isHearted: isHearted, action: {
                self.isHearted.toggle()
            }).padding()
        }
    }
}