swift basics
String Interpolation
var name = "Eric"
println("Hello, \(name)")
// "Hello, Eric"
Dictionaries
var response = ["id":14,"email":"test@email.com"]
let id = response["id"]
// 14
let email = response["email"]
// "test@email.com"
Tuples
Unnamed Tuples
var coordinates = (100, 999)
let (lat, lon) = coordinates
println("Latitude is \(lat)")
// "Latitude is 100"
println("Longtitude is \(lon)")
// Longitude is 999
Named Tuples
var response = (code: 200, message: "All good")
response.0
// 200
response.1
// "All good"
response.code
// 200
respsonse.message
// "All good"
Swift Classes
Creating a class
class Person: NSObject {
var name: String
var email: String
var zip: Int
init(name: String, email: String, zip: Int) {
self.name = name
self.email = email
self.zip = zip
super.init()
}
}
Create data for Person Class
let personData = [
Person(name: "Eric", email: "eric.iacutone@gmail.com", zip: 12345)
]
Instantiating Person Class
var person:Array = personData
Now, if you copy and paste the the files into a XCode Playground, you can call methods on your person object.
person.count
// 1
person.first?.zip
// 12345
Enums
An enumeration defines a common type for a group of related values and enables you to work with those values in a type-safe way within your code. - Swift docs
Use an enum when you need a consistent data value.
enum CountryType:String {
case UnitedStates = "United States"
case Spain = "Spain"
init() {
self = .UnitedStates
}
}
var type = CountryType.UnitedStates.rawValue
// "United States"
Structs
A struct allows you to create a structured data type which provides storage of data using properties and extending its functionality via methods. -Tree House
struct Person {
var name: String
var email: String
var country: CountryType
}
var person = Person(name: "Eric", email: "eric.iacutone@gmail.com", country: CountryType.UnitedStates)
person.name
// "Eric"
person.country.rawValue
// "United States"