SmallDeskSoftware 
Start 100DaysOfSwiftUI from 2020.Mar.18th.
Day 43, 44, 45, 46: Project 9, part one/two/three/four
done with 2.5 hours
New findings: followings are new findings
- I wonder why path(in rect: CGRect) will receive rect from frame modifier, but it would come from Shape, I guess.
- ImagePaint, I’m not sure when I’ll use it, but looks nice for excellent UI
- animationData works without adding further code. super!
Here is the code except Challenge 3.
# I could not have much interest in ColorCycling…
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struct ContentView: View { @State private var thickness : CGFloat = 50.0 var body: some View { VStack(spacing: 0) { Spacer() Arrow(thickness: thickness) .stroke(Color.red, lineWidth: 1) .animation(.default) Spacer() Group { Text("arrow thickness: \(Int(thickness))") Slider(value: $thickness, in: 1...150, step: 5) .padding([.horizontal, .bottom]) } } } } struct Arrow: Shape { var thickness: CGFloat var animatableData: CGFloat { get { thickness } set { self.thickness = newValue } } func path(in rect: CGRect) -> Path { var path = Path() // triangle path.move(to: CGPoint(x: rect.midX, y: rect.minY)) path.addLine(to: CGPoint(x: rect.minX, y: rect.maxY/2)) path.addLine(to: CGPoint(x: rect.maxX, y: rect.maxY/2)) path.addLine(to: CGPoint(x: rect.midX, y: rect.minY)) let rectXstart = rect.midX - thickness / 2 let rectXend = rect.midX + thickness / 2 // rectangle path.move(to: CGPoint(x: rectXstart, y: rect.maxY/2)) path.addLine(to: CGPoint(x: rectXstart, y: rect.maxY)) path.addLine(to: CGPoint(x: rectXend, y: rect.maxY)) path.addLine(to: CGPoint(x: rectXend, y: rect.maxY/2)) path.addLine(to: CGPoint(x: rectXstart, y: rect.maxY/2)) return path } } |
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