Multi Counter - Swiftui Typing CST Test
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Multi Counter — Swiftui Code
Multiple independent counters in a single view.
import SwiftUI
struct MultiCounterView: View {
@State private var counters: [Int] = [0,0,0]
var body: some View {
VStack(spacing: 20) {
ForEach(counters.indices, id: \.self) { i in
VStack {
Text("Counter \(i+1): \(counters[i])")
HStack {
Button("+") { counters[i] += 1 }
Button("-") { counters[i] -= 1 }
}
}
}
}.padding()
}
}
@main
struct MultiCounterApp: App {
var body: some Scene {
WindowGroup {
MultiCounterView()
}
}
}Swiftui Language Guide
SwiftUI is Apple’s declarative framework for building user interfaces across iOS, macOS, watchOS, and tvOS using Swift. It allows developers to create fully native apps with less code and real-time previews.
Primary Use Cases
- ▸Native iOS apps with modern UI
- ▸macOS desktop apps
- ▸watchOS and tvOS apps
- ▸Rapid prototyping for Apple platforms
- ▸Apps leveraging Swift ecosystem and Apple frameworks
Notable Features
- ▸Declarative syntax for UI building
- ▸Live preview in Xcode
- ▸Cross-Apple-platform support
- ▸Seamless integration with Swift and Combine
- ▸Supports animations, gestures, and adaptive layouts
Origin & Creator
Created by Apple in 2019, SwiftUI was introduced to unify UI development across Apple platforms and replace UIKit/AppKit with a declarative approach.
Industrial Note
Perfect for Apple ecosystem apps where full native performance, Swift language, and declarative UI are priorities.