YouTipSwift for iOS
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let label = UILabel()
label.text = "Hello, iOS!"
view.addSubview(label)
}
}Swift Basics
let name = "Alice" // constant
var age = 25 // variable
var email: String? = nil // optional
if let e = email {
print(e)
}Summary
- Swift uses let for constants, var for variables
- Optionals handle nil safely