Swift

Overview

Remember that SwiftUI code from the previous article?

struct ContentView: View {
    var body: some View {
        Text("Hello, world!")
        .foregroundColor(Color.blue)
    }
}

That’s actually swift code. Pretty advanced swift code, but it’s still swift.

• View is a protocol
• The brackets {} are closures
• "Hello, world!" is a string
• .blue is a variable

But for now, let’s start simpler and first learn the basics.

Creating variables

Simple syntax like python.

let string: String = "Hello"
let string = "Hello" /// this also works

Defining functions

func function1() {
  print("Hi")
}

/// This has 1 parameter
func function2(string: String) {
  print(string)
}

/// This has 1 parameter with an external name
func function3(stringToOutput string: String) {
  print(string)
}

/// This has 1 parameter with an external name
func function4(stringToOutput string: String) {
  print(string)
}

Calling functions

function1() /// Result: Hi
function2(string: "Hi") /// Result: Hi
function3(stringToOutput: "Hi") /// Result: Hi