SwiftUI Fundamentals

Feb 28 2023 · Swift 5.7, macOS Venture 13.1, Xcode 14.2

Part 1: SwiftUI Views

05. State & Binding

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Previous episode: 04. Challenge: Views & Modifiers Next episode: 06. Challenge: State & Binding

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So far you’ve been working with views that don’t really do anything. They aren’t interactive. They don’t affect anything else and nothing affects them. Let’s try out something a little more complicated. Like, using a color picker to update the color of an image.

ColorPicker(/*@START_MENU_TOKEN@*/"Title"/*@END_MENU_TOKEN@*/, selection: /*@START_MENU_TOKEN@*/.constant(.red)/*@END_MENU_TOKEN@*/)
ColorPicker("Swifty Color", ...
struct ContentView: View {
  var swiftyColor: Color = .red
struct ContentView: View {
  @State var swiftyColor: Color = .red
selection: swiftyColor
@State var swiftyOpacity: Double = 0.7
Slider(value: $swiftyOpacity, in: 0...1)
@State var swiftyOpacity: Double = 0.7
@State var swiftyColor: Color = .red
@Binding var swiftyOpacity: Double
@Binding var swiftyColor: Color
@State 🟢private var swiftyOp
@State 🟢private var swiftyCo
  swiftyOpacity: $swiftyOpacity,
  swiftyColor: $swiftyColor