ios - 如何为每条线段添加颜色？

Question

如何为每一行添加颜色？我希望所有的线条都有不同的颜色。例如，一面是蓝色，一面是红色，另一面是绿色。

override func viewDidLoad() {
    super.viewDidLoad()

    shape = CAShapeLayer()
    view.layer.addSublayer(shape)
    shape.opacity = 0.5
    shape.lineWidth = 2
    shape.lineJoin = kCALineJoinMiter
    shape.strokeColor = UIColor(hue: 0.786, saturation: 0.79, brightness: 0.53, alpha: 1.0).CGColor
    shape.fillColor = UIColor(hue: 0, saturation: 0, brightness: 0, alpha: 0).CGColor

    path = UIBezierPath()
    path.moveToPoint(CGPointMake(150, 300))
    path.addLineToPoint(CGPointMake(230, 300))
    path.addLineToPoint(CGPointMake(250, 350))
    path.addLineToPoint(CGPointMake(230, 400))
    path.addLineToPoint(CGPointMake(150, 400))
    path.addLineToPoint(CGPointMake(150, 400))
    path.addLineToPoint(CGPointMake(130, 350))
    path.addLineToPoint(CGPointMake(150, 300))
    path.closePath()
    shape.path = path.CGPath
    // Do any additional setup after loading the view, typically from a nib.
}

Answer 1

单一路径(单一形状图层)以单一颜色绘制。您可能应该为每种所需的颜色创建一个单独的形状层，并将要以相同颜色绘制的线段放入每个形状层的路径中(使用 moveToPoint/lineToPoint 创建不连续的线)。

将所有形状层作为子层添加到要包含绘图的 View 中。