Mise à jour de 'README.md'

README.md

@@ -1,2 +1,50 @@
 # SwiftIOSLearning
 
+## * CODE POUR CHANGEMENT DE COULEUR
+<code>
+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)
+    }
+</code>