🧐 SwiftUI Previews 🧐

This package will allow you to easily incorporate SwiftUI Previews into your native UIKit & AppKit projects. Inspired by the NSHipster article found here: https://nshipster.com/swiftui-previews/

Usage:

Consider a subclass of UIButton that draws a border around itself:

final class BorderedButton: UIButton {
    var cornerRadius: CGFloat { <#...#> }
    var borderWidth: CGFloat { <#...#> }
    var borderColor: UIColor? { <#...#> }
}

#if canImport(SwiftUI) && DEBUG
import SwiftUI

@available(iOS 13.0, *)
struct BorderedButton_Preview: PreviewProvider {
  static var previews: some View {
    UIViewPreview {
      let button = BorderedButton(frame: .zero)
      button.setTitle("Follow", for: .normal)
      button.tintColor = .systemOrange
      button.setTitleColor(.systemOrange, for: .normal)
      return button
    }.previewLayout(.sizeThatFits)
     .padding(10)
  }
}
#endif

Snippets NSView & NSViewController

#if canImport(SwiftUI) && DEBUG
import SwiftUI

struct <#NSView#>Preview: PreviewProvider {
    
    static var previews: some View {
        NSViewPreview {
            <#Code#>
        }
    }
    
}

#endif

#if canImport(SwiftUI) && DEBUG
import SwiftUI

struct <#NSViewController#>Preview: PreviewProvider {
    
    static var previews: some View {
        NSViewControllerPreview {
            <#Code#>
        }
    }
    
}

#endif

Snippets UIView & UIViewController

#if canImport(SwiftUI) && DEBUG
import SwiftUI

struct <#UIiew#>Preview: PreviewProvider {
    
    static var previews: some View {
        UIViewPreview {
            <#Code#>
        }
    }
    
}

#endif

#if canImport(SwiftUI) && DEBUG
import SwiftUI

struct <#UIViewController#>Preview: PreviewProvider {
    
    static var previews: some View {
        UIViewControllerPreview {
            <#Code#>
        }
    }
    
}

#endif

Requirements

• iOS 11+ / macOS 10.15+
• Xcode 11.0+
• Swift 5.1+

Installation

🧐 SwiftUI Previews 🧐 is meant to be installed using the Swift Package Manager. To install it, simply declare it as a dependency in your Package.swift:

.package(url: "https://github.com/cfacorp/swiftui-previews")

For more information, see the Swift Package Manager documentation.