instance member .... cannot be used on type

Question

Created Nov ’20

Replies 3

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Views 4k

Participants 2

This code give err instance member theName cannot be used on type myClass
any suggestions?

//
// ContentView.swift
// myTest
//
// Created by N.N on 2020-11-25.
//

import SwiftUI

struct ContentView: View {
var body: some View {
Text(MyClass.theName as! String)
.padding()
}
}

struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
class MyClass {
var theName: String?
init() {
theName = "myName"
}
}

Boost

Answer 1

OOPer OP

Nov ’20

You need to create an instance when you want to access an instance property (or an instance method) of a class.

Code Block import SwiftUI
struct ContentView: View {
    let myInstance = MyClass() //<- Create an instance of `MyClass`
    
    var body: some View {
        Text(myInstance.theName ?? "") //<- Access the instance property through the instance
            .padding()
    }
}
struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}
class MyClass {
    var theName: String?
    init() {
        theName = "myName"
    }
}

1

Answer 2

larsA52 OP

Nov ’20

Thankyou
I thought I tried that to but obvisly not correct

0

Answer 3

larsA52 OP

Nov ’20

this works bu if I take away the comment before print I get
Cannot find type 'myInstance' in scope
that obvisly work in the Text statment
Why?

//
// ContentView.swift
// myTest
//
// Created by N.N on 2020-11-25.
//

import SwiftUI

struct ContentView: View {
  var myInstance = MyClass()
//  print(myInstance.theName)

  var body: some View {

    Text(myInstance.theName)
      .padding()
  }
}

struct ContentView_Previews: PreviewProvider {
  static var previews: some View {
    ContentView()
  }
}
class MyClass {
  var theName: String = "myName"
}

0