Alert

gistfile1.txt

// Default alert
let alert = UIAlertController(title: "Did you bring your towel?", message: "It's recommended you bring your towel before continuing.", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Yes", style: .default, handler: { action in
    print("Yay! You brought your towel!")
}))
alert.addAction(UIAlertAction(title: "No", style: .cancel, handler: nil))
self.present(alert, animated: true)



// Alert with text fields
let alert = UIAlertController(title: "What's your name?", message: nil, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
alert.addTextField(configurationHandler: { textField in
    textField.placeholder = "Input your name here..."
})
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { action in
    if let name = alert.textFields?.first?.text {
        print("Your name: \(name)")
    }
}))
self.present(alert, animated: true)