Calculator20200130

20200130calcTest.swift

import SwiftUI

struct ContentView: View {
  
        @State var display = 0
        @State var currentValue = 0
        @State var useIsInTheMiddleOfTyping = false
        @State var first = 0
        @State var second = 0
        @State var operand = "+"
        @State var typingNow = false
  

      var body: some View {
          VStack{

            Text(String(display))
            .padding()

           Button("数字ボタン1"){
            self.first = 9
            self.display = self.first

             }.padding()
            
            Button("演算子[＋]ボタン"){
                     self.operand = "-"
               

                      }.padding()
            
            Button("数字ボタン2"){
                       self.second = 5
                      self.display = self.second
                        }.padding()
            
            Button("演算子[=]ボタン"){
                
                switch self.operand{
                case "+":
                     self.display = self.first + self.second
                    
                case "-":
                    self.display = self.first - self.second
                default:
                    print("演算子なし！")
                }
                
                
                
//                if self.operand == "+"{
//                  self.display = self.first + self.second
//                }

                               }.padding()
            
            
            
            Button("AC"){
                          self.display = 0

            }.padding()
                
            }
        
        }

}

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