SwiftUI from entry to actual combat Chapter 2 Section 12: Shape-Path

Related courses: http://hdjc8.com/hdjc/swiftUI/

Use Path with move and addLine to draw custom graphics. This lesson demonstrates the drawing of a path. You can draw extremely complex graphics through the Path. In Chapter 8, we used the path to draw a beautiful polyline chart, but this section only explains the drawing of the basic path.

Sample code:

//首先添加一个路径，在闭包语句里进行路径形状的定义。
Path { path in
    //将路径的起点移到此处的坐标位置，也就是水平坐标为30，垂直坐标为0的位置。
   path.move(to: CGPoint(x: 30, y: 0))
    //然后通过addLine方法，从路径的起点，绘制一条直线，直线的终点坐标为{30, 200}。
   path.addLine(to: CGPoint(x: 30, y: 200))
    //接着从点{30, 200}开始，向右侧绘制一条直线，直线的终点坐标为{230, 200}。
   path.addLine(to: CGPoint(x: 230, y: 200))
    //继续向上方绘制一条直线，直线的终点坐标为{230, 0}。
    path.addLine(to: CGPoint(x: 230, y: 0))
}

Path { path in
    path.addEllipse(in: CGRect(x: 100, y: 30, width: 200, height: 200))

    path.addRoundedRect(in: CGRect(x: 100, y: 120, width: 200, height: 200), cornerSize: CGSize(width: 10, height: 10))

    path.addEllipse(in: CGRect(x: 100, y: 210, width: 200, height: 200))
}

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