Created
July 3, 2020 10:43
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| // | |
| // ContentView.swift | |
| // AngularDemo | |
| // | |
| // Created by MC on 2020/7/1. | |
| // | |
| import SwiftUI | |
| struct ContentView: View { | |
| var body: some View { | |
| Example1() | |
| } | |
| } | |
| struct Example1: View { | |
| var body: some View { | |
| HStack { | |
| Spacer() | |
| VStack { | |
| RoundedRectangle(cornerRadius: 10) | |
| .fill(LinearGradient(gradient: Gradient(colors: [.green, .orange, .blue]), | |
| startPoint: .leading, | |
| endPoint: .trailing)) | |
| Text("LinearGradient") | |
| } | |
| Spacer() | |
| VStack { | |
| RoundedRectangle(cornerRadius: 10) | |
| .fill(RadialGradient(gradient: Gradient(colors: [.green, .orange, .blue]), | |
| center: .center, | |
| startRadius: 0, | |
| endRadius: 100)) | |
| Text("RadialGradient") | |
| } | |
| Spacer() | |
| VStack { | |
| RoundedRectangle(cornerRadius: 10) | |
| .fill(AngularGradient(gradient: Gradient(colors: [.white, .green, .white, .orange, .white, .blue, .white]), | |
| center: .center)) | |
| Text("AngularGradient") | |
| } | |
| Spacer() | |
| } | |
| .padding(.vertical, 30) | |
| } | |
| } | |
| struct Example2: View { | |
| @State private var show = false | |
| let colors: [UIColor] = [.green, .blue] | |
| var body: some View { | |
| VStack { | |
| Spacer() | |
| ZStack(alignment: .leading) { | |
| RoundedRectangle(cornerRadius: 0) | |
| .fill(LinearGradient(gradient: .init(colors: [.green, .blue]), startPoint: /*@START_MENU_TOKEN@*/ .leading/*@END_MENU_TOKEN@*/, endPoint: /*@START_MENU_TOKEN@*/ .trailing/*@END_MENU_TOKEN@*/)) | |
| .frame(width: 400, height: 150, alignment: /*@START_MENU_TOKEN@*/ .center/*@END_MENU_TOKEN@*/) | |
| RoundedRectangle(cornerRadius: 0) | |
| .modifier(MyAnimationModifier(pct: show ? 1 : 0, colors: colors)) | |
| .frame(width: 20, height: 200) | |
| .offset(x: show ? 400 : 0, y: 0) | |
| } | |
| ZStack(alignment: .leading) { | |
| RoundedRectangle(cornerRadius: 0) | |
| .stroke(Color.green, lineWidth: 3) | |
| .frame(width: 400, height: 150) | |
| RoundedRectangle(cornerRadius: 0) | |
| .fill(Color.black) | |
| .frame(width: 5, height: 200) | |
| .offset(x: show ? 400 : 0, y: 0) | |
| } | |
| ZStack(alignment: .leading) { | |
| RoundedRectangle(cornerRadius: 0) | |
| .stroke(Color.green, lineWidth: 3) | |
| .frame(width: 400, height: 150) | |
| RoundedRectangle(cornerRadius: 0) | |
| .fill(Color.black) | |
| .frame(width: 5, height: 200) | |
| .rotationEffect(.degrees(45), anchor: .center) | |
| .offset(x: show ? 500 : -100, y: 0) | |
| } | |
| // | |
| Spacer() | |
| Button("开始扫描") { | |
| withAnimation(.linear(duration: 3)) { | |
| self.show.toggle() | |
| } | |
| } | |
| } | |
| } | |
| } | |
| struct MyAnimationModifier: AnimatableModifier { | |
| var pct: Double | |
| let colors: [UIColor] | |
| var animatableData: Double { | |
| get { | |
| pct | |
| } | |
| set { | |
| pct = newValue | |
| } | |
| } | |
| func body(content: Content) -> some View { | |
| RoundedRectangle(cornerRadius: 0) | |
| .fill(color(pct)) | |
| } | |
| func color(_ pct: Double) -> Color { | |
| let tmpPct = 1.0 / Double(colors.count - 1) | |
| let index = Int(pct / tmpPct) | |
| let percent = (pct - Double(index) * tmpPct) / tmpPct | |
| let color2Index = ((index + 1) >= colors.count) ? (colors.count - 1) : (index + 1) | |
| return colorMixer(c1: colors[index], c2: colors[color2Index], pct: CGFloat(percent)) | |
| } | |
| func colorMixer(c1: UIColor, c2: UIColor, pct: CGFloat) -> Color { | |
| let rgbSpace = CGColorSpaceCreateDeviceRGB() | |
| guard let cc1 = c1.cgColor.converted(to: rgbSpace, intent: .defaultIntent, options: nil)?.components else { | |
| return Color(c1) | |
| } | |
| guard let cc2 = c2.cgColor.converted(to: rgbSpace, intent: .defaultIntent, options: nil)?.components else { | |
| return Color(c2) | |
| } | |
| let r = cc1[0] + (cc2[0] - cc1[0]) * pct | |
| let g = cc1[1] + (cc2[1] - cc1[1]) * pct | |
| let b = cc1[2] + (cc2[2] - cc1[2]) * pct | |
| return Color(red: Double(r), green: Double(g), blue: Double(b)) | |
| } | |
| } | |
| struct ContentView_Previews: PreviewProvider { | |
| static var previews: some View { | |
| ContentView() | |
| } | |
| } |
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