zusammengesetzte properties, newValue

Playground.swift

@@ -4,14 +4,19 @@ import Playgrounds
 struct Bike {
     var name: String
     var color: String
-    
+    // newValue ist ein special keyword
+    var description: String {
+        set { name = newValue }
+        get {"A bike called \(name) and it is \(color)." }}
     static let trek = Bike(name: "Trek", color: "red" )
 }
 
 #Playground {
     var greeting = "Hallo Playground"
-    let bike = Bike.trek
-    bike.color
+    var bike = Bike.trek
+    bike.description
+    bike.description = "Mein Rad"
+    bike.description
     
     // write code here
 }