Your First iOS & SwiftUI App: An App from Scratch

Feb 13 2023 Swift 5.7, iOS 16, Xcode 14

Part 3: Coding in Swift

28. Type Inference

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Previous episode: 27. Variables & Constants Next episode: 29. Conclusion

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This video Type Inference was last updated on Feb 13 2023

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We’ve now reduced our points(sliderValue:) method to just a few lines of code.

  let difference = abs(target - sliderValue)
  let awardedPoints = 100 - difference
var target = Int.random(in: 1...100)
var score = 0
var round = 1

ContentView.swift

Let’s go to ContentView.swift, and we can clean up some of these as well.

@State private var alertIsVisible = false
@State private var sliderValue = 50.0
@State private var game = Game()
let roundedValue = Int(sliderValue.rounded())
return 100 - difference
return 100 - abs(target - sliderValue)
100 - abs(target - sliderValue)