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import SwiftUI
struct GreenButtonStyle: ViewModifier {
func body(content: Content) -> some View {
return content
.foregroundColor(.white)
.background(Color.green)
.border(Color(red: 7/255,
green: 171/255,
blue: 67/255),
width: 5)
}
}
struct BlueButtonStyle: ViewModifier {
func body(content: Content) -> some View {
return content
.foregroundColor(.white)
.background(Color.blue)
.border(Color(red: 7/255,
green: 42/255,
blue: 171/255),
width: 5)
}
}
struct StyledButton: ViewModifier {
enum ButtonColor {
case green
case blue
func backgroundColor() -> Color {
switch self {
case .green:
return Color.green
case .blue:
return Color.blue
}
}
func borderColor() -> Color {
switch self {
case .green:
return Color(red: 7/255,
green: 171/255,
blue: 67/255)
case .blue:
return Color(red: 7/255,
green: 42/255,
blue: 171/255)
}
}
}
let buttonColor: ButtonColor
func body(content: Content) -> some View {
return content
.foregroundColor(.white)
.background(buttonColor.backgroundColor())
.border(buttonColor.borderColor(),
width: 5)
}
}
struct Track: ViewModifier {
let eventName: String
func body(content: Content) -> some View {
return content.simultaneousGesture(TapGesture().onEnded({
print(self.eventName)
}))
}
}
struct BorderChange: ViewModifier {
enum BorderColor: CaseIterable {
case black
case blue
case red
func color() -> Color {
switch self {
case .black:
return .black
case .blue:
return .blue
case .red:
return .red
}
}
func next() -> BorderColor {
// 1
let allColors = BorderColor.allCases
// 2
if let lastIndex = allColors.lastIndex(of: self) {
// 3
if lastIndex + 1 == allColors.count {
return allColors[0]
}
// 4
return allColors[lastIndex + 1]
}
// 5
return self
}
}
@State var currentState = BorderColor.black
func body(content: Content) -> some View {
return content.border(self.currentState.color(),
width: 5).simultaneousGesture(TapGesture().onEnded({
self.currentState = self.currentState.next()
}))
}
}
struct ContentView: View {
var body: some View {
Button(action: {
print("Button Pressed")
}, label: {
Text("Button").padding()
})
.modifier(BorderChange())
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
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