1
2

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?

More than 1 year has passed since last update.

【Swift】CIFilterで画像を古い写真のような見た目にする

Posted at

はじめに

CIFilterで画像をセピア色に加工するものがあったので記事にしておきます

サンプルアプリ

Simulator Screen Recording - iPhone 15 - 2023-11-02 at 22.42.44.gif

実装

import SwiftUI

struct ContentView: View {
    private let image = UIImage(named: "sample1")!

    @State private var uiImage: UIImage?

    var body: some View {
        ScrollView {
            VStack {
                if let uiImage {
                    Image(uiImage: uiImage)
                        .resizable()
                        .scaledToFit()
                } else {
                    Image(uiImage: image)
                        .resizable()
                        .scaledToFit()
                }

                HStack(spacing: 15) {
                    Button {
                        applySepiaTone()
                    } label: {
                        Text("適用")
                    }

                    Button {
                        uiImage = nil
                    } label: {
                        Text("リセット")
                    }
                }
            }
            .padding(.horizontal, 20)
        }
    }

    func applySepiaTone() {
        let context = CIContext()
        let inputImage = CIImage(image: image)!

        guard let filter = CIFilter(name: "CISepiaTone", parameters: [
            kCIInputImageKey: inputImage
        ]) else { return }
        guard let outputImage = filter.outputImage else { return }
        guard let cgImage = context.createCGImage(outputImage, from: outputImage.extent) else { return }
        self.uiImage = UIImage(cgImage: cgImage)
    }
}

おわり

めっちゃそれっぽい画像に加工することができました

1
2
0

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
1
2

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?