SwiftUI_Timer

gistfile1.txt

//
//  ContentView.swift
//  SwiftUI_PickerandTimer
//
//  Created by 永田大祐 on 2020/03/15.
//  Copyright © 2020 永田大祐. All rights reserved.
//

import SwiftUI

struct ContentView: View {
    
    var pic = PicKerView()
    @ObservedObject var vm = ViewModel()
    @State private var select = 3
    
    init() {
        self.vm.setupTimer(0.5)
    }

    var body: some View {
        ZStack {
            self.vm.color
            VStack {
                Picker(selection: $select, label: Text("Luangage")) {
                    Text("Swift").tag(1)
                    Text("Kotlin").tag(2)
                    Text("Python").tag(3)
                    Text("Java").tag(4)
                    Text("Ruby").tag(5)
                }
                .frame(width: 400)

                Text("select：\(select)")
//                pic
            }
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

final class ViewModel: ObservableObject {

    @Published var timer: Timer?
    @Published var color = Color.red
    
    func setupTimer(_ time: Double) {
        self.timer = Timer(timeInterval: time, target: self, selector: #selector(timerSet), userInfo: nil, repeats: true)
        //登録
        RunLoop.main.add(self.timer!, forMode: .common)
    }

    @objc func timerSet() {
        if self.color == Color.red {
            self.color = Color.blue
        } else {
            self.color = Color.red
        }
    }
}

struct PicKerView: UIViewRepresentable {

    private let pic = PickerKit()

    func makeUIView(context: UIViewRepresentableContext<PicKerView>) -> PickerKit {
        pic.delegate = pic
        pic.dataSource = pic
        return pic
    }
    
    func updateUIView(_ uiView: PickerKit, context: UIViewRepresentableContext<PicKerView>) {
        
    }
}

class PickerKit: UIPickerView, UIPickerViewDelegate, UIPickerViewDataSource {
    
     let list: [String] = ["Swift", "Kotlin", "Python", "Java", "Ruby"]
 
    // ドラムロールの列数
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    
    // ドラムロールの行数
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return list.count
    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return list[row]
    }
    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
//        self.textField.text = list[row]
    }
}

RunLoop.main.add(self.timer!, forMode: .common) is nonstop