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51 lines
1.8 KiB
51 lines
1.8 KiB
# SwiftIOSLearning
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## * CODE POUR CHANGEMENT DE COULEUR
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<code>
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import SwiftUI
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import Combine
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struct ContentView: View {
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@State private var color: Color = .white
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var body: some View {
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ZStack {
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color
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VStack {
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Image("Image1")
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.resizable()
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.aspectRatio(contentMode: .fit)
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.frame(height: 200)
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.onReceive(Just(UIImage(named: "Image1"))) { uiImage in
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if let averageColor = uiImage?.averageColor {
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self.color = Color(averageColor)
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}
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}
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.scaledToFit()
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.clipShape(RoundedRectangle(cornerRadius: 20))
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.overlay(RoundedRectangle(cornerRadius: 20)
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.stroke(Color.gray, lineWidth: 2))
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Spacer()
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}
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.padding(EdgeInsets.init(top: 32, leading: 12, bottom: 12, trailing: 12))
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}
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}
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struct ContentView_Previews: PreviewProvider {
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static var previews: some View {
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ContentView()
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}
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}
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}
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extension UIImage {
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var averageColor: UIColor? {
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guard let inputImage = CIImage(image: self) else { return nil }
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let extent = inputImage.extent
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let context = CIContext(options: nil)
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let ciFilter = CIFilter(name: "CIAreaAverage", parameters: [kCIInputImageKey: inputImage, kCIInputExtentKey: CIVector(cgRect: extent)])!
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var bitmap = [UInt8](repeating: 0, count: 4)
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context.render(ciFilter.outputImage!, toBitmap: &bitmap, rowBytes: 4, bounds: CGRect(x: 0, y: 0, width: 1, height: 1), format: .RGBA8, colorSpace: nil)
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return UIColor(red: CGFloat(bitmap[0]) / 255, green: CGFloat(bitmap[1]) / 255, blue: CGFloat(bitmap[2]) / 255, alpha: 1.0)
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}
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</code>
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