SwiftIOSLearning/README.md

SwiftIOSLearning

* CODE POUR CHANGEMENT DE COULEUR

import SwiftUI import Combine

struct ContentView: View { @State private var color: Color = .white

var body: some View {
    ZStack {
        color
        VStack {
            Image("Image1")
                .resizable()
                .aspectRatio(contentMode: .fit)
                .frame(height: 200)
                .onReceive(Just(UIImage(named: "Image1"))) { uiImage in
                    if let averageColor = uiImage?.averageColor {
                        self.color = Color(averageColor)
                    }
                }
                .scaledToFit()
                .clipShape(RoundedRectangle(cornerRadius: 20))
                .overlay(RoundedRectangle(cornerRadius: 20)
                            .stroke(Color.gray, lineWidth: 2))
            Spacer()
        }
        .padding(EdgeInsets.init(top: 32, leading: 12, bottom: 12, trailing: 12))
    }
}
struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

}

extension UIImage { var averageColor: UIColor? { guard let inputImage = CIImage(image: self) else { return nil } let extent = inputImage.extent let context = CIContext(options: nil) let ciFilter = CIFilter(name: "CIAreaAverage", parameters: [kCIInputImageKey: inputImage, kCIInputExtentKey: CIVector(cgRect: extent)])! var bitmap = [UInt8](repeating: 0, count: 4) context.render(ciFilter.outputImage!, toBitmap: &bitmap, rowBytes: 4, bounds: CGRect(x: 0, y: 0, width: 1, height: 1), format: .RGBA8, colorSpace: nil) return UIColor(red: CGFloat(bitmap[0]) / 255, green: CGFloat(bitmap[1]) / 255, blue: CGFloat(bitmap[2]) / 255, alpha: 1.0) }