Demo code of buttonStyle in SwiftUI

SwiftUI_buttonStyle.swift

struct TokenButtonStyle: ButtonStyle {
    /// Global properties
    private let styleType: StyleType
    private var iconSize: TokenButton.IconSize?
    private var backgroundColor: Color?
    private var borderStyle: StyleAlias.BorderStyle?
    private var textColor: Color?
    
    /// Circle Icon Button
    init(iconSize: TokenButton.IconSize,
         backgroundColor: BackgroundColor,
         border: BorderStyle? = .none) {
        // --snip--
    }
    
    /// Icon Button
    init(iconSize: TokenButton.IconSize) {
        // --snip--
    }
    
    /// Capsule Button
    init(backgroundColor: BackgroundColor, textColor: TextColor) {
        // --snip--
    }
    
    /// Text Button
    init(textColor: TextColor) {
        // --snip--
    }
    
    /// Rendering Button Style
    func makeBody(configuration: Self.Configuration) -> some View {
        var renderView: AnyView!
        let verticalMargin = CapsuleValue.verticalMargin.rawValue
        let horizontalMargin = CapsuleValue.horizontalMargin.rawValue
        
        switch styleType {
        case .circleIcon:
            renderView = AnyView(configuration.label
                // --snip--
            )
        case .icon:
            renderView = AnyView(configuration.label
                // --snip--
            )
        case .capsule:
            renderView = AnyView(configuration.label
                // --snip--
            )
        case .text:
            renderView = AnyView(configuration.label
                // --snip--
            )
        }
        
        return renderView.opacity(getOpacityValue(configuration.isPressed))
    }
}