CODEWITHSUNDEEP
swiftuitextfieldswift5
Rick H
Rick H

Reputation: 11

Swift5 Text Field Integers from User Input

Using Swift5. UI (not storyboard), being new to Xcode, after retrieving Text Field STRING from user, 1) how do I CONVERT the string to an integer so that I can perform math calculations from user responses to multiple text fields?.. and 2) where does the code go?

Upvotes: 0

Views: 446

Answers (3)

Rick H
Rick H

Reputation: 11

Sorry, (I'm really new at this) for not including my code earlier. Hope this helps.

import SwiftUI

struct ContentView: View {
    @State var xUSERNAME: String = ""
    @State var xUSERNAME2: String = ""
    @State var xMATH: Int = 2

    var body: some View {
        VStack(alignment: .leading) {
            Text("Hello World!")
            TextField("Enter User Name...", text: $xUSERNAME)
                .foregroundColor(.black)
                .textFieldStyle(RoundedBorderTextFieldStyle())
            Text("YOUR USER NAME: \(xUSERNAME)")
                .fontWeight(.bold)
        
            TextField("Enter User Name...", text: $xUSERNAME2)
                .foregroundColor(.black)
                .textFieldStyle(RoundedBorderTextFieldStyle())
            Text("YOUR USER NAME: \(xUSERNAME2)")
                .fontWeight(.bold)
            Text("YOUR USER NAME: \(xUSERNAME)\(xUSERNAME2)")
            Text("\(xUSERNAME)")
        }.padding()   
    }
}

Upvotes: 1

Kuhlemann
Kuhlemann

Reputation: 3396

1)

    @State private var textfieldInput = ""
    var Int1: Int {
    return Int(textfieldInput) ?? 0 // String to Int conversion is always return optional.
    }

    //some code
    TextField("Text", text: $textfieldInput)

2) How shall wie tell, if we don't know your code? But I tried my best above to show the concept.

Upvotes: 1

NikzJon
NikzJon

Reputation: 954

In the following app, resultString is the computed property that convert string to Int. This expression is an Optional since String can be anything when we try. 

import SwiftUI

struct ContentView: View {
    @State private var num: Int = 0
    @State private var text: String = "0"
    private var resultInt: Int {
        return self.num*self.num
    }
    private var resultString: String {
        if let num = Int(self.text) { // Here it convert the string to an integer
            return String(num*num)
        }
        return "0"
    }
    var body: some View {
        VStack {
            TextField("String Number",text: self.$text)
            .textFieldStyle(RoundedBorderTextFieldStyle())
            TextField("Int Number", value: self.$num, formatter: NumberFormatter())
            .textFieldStyle(RoundedBorderTextFieldStyle())
            Spacer()
            Text("Square is \(self.resultInt)").font(.title)
            Text("Square is \(self.resultString)").font(.title)
            Spacer()
        }.padding()
    }
}

@rick-h comment down if you need clarification

Upvotes: 1

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