SwiftUI 的路径不必是连续的，孤立的形状，而可以是多个矩形，椭圆形等等，它们可以组合成一个整体。
作为演示此问题的简便方法，我们可以编写一个形状，通过构建一系列具有一定数量的行和列的矩形来创建棋盘格图案，如下所示：
struct Checkerboard: Shape {
let rows: Int
let columns: Int
func path(in rect: CGRect) -> Path {
var path = Path()
// figure out how big each row/column needs to be
let rowSize = rect.height / CGFloat(rows)
let columnSize = rect.width / CGFloat(columns)
// loop over all rows and columns, making alternating squares colored
for row in 0 ..< rows {
for column in 0 ..< columns {
if (row + column).isMultiple(of: 2) {
// this square should be colored; add a rectangle here
let startX = columnSize * CGFloat(column)
let startY = rowSize * CGFloat(row)
let rect = CGRect(x: startX, y: startY, width: columnSize, height: rowSize)
path.addRect(rect)
}
}
}
return path
}
}
// Create a checkerboard in a view
struct ContentView: View {
var body: some View {
Checkerboard(rows: 16, columns: 16)
.fill(Color.red)
.frame(width: 200, height: 200)
}
}