swift - 在 Swift 中更改 UIBezierPath 的颜色

Question

我试图更改 UIBezierPath 的颜色，所以我从 Internet 上复制了一些可靠的代码，但出现了一个我似乎无法理解的错误。下面是代码和错误。请帮忙。

 override func draw(_ rect: CGRect) {
    let skullRadius = min(bounds.width, bounds.height)
    let skullCenter = CGPoint(x: bounds.midX, y: bounds.midY)
    let skull = UIBezierPath(arcCenter: skullCenter, radius: skullRadius, startAngle: 0.0, endAngle: CGFloat(2*M_PI), clockwise: false)
    skull.lineWidth = 3
    UIColor.blueColor().setFill()
    skull.stroke()
}

Answer 1

你应该这样的代码:

 override func draw(_ rect: CGRect) {
    let skullRadius = min(bounds.width, bounds.height)
    let skullCenter = CGPoint(x: bounds.midX, y: bounds.midY)
    let skull = UIBezierPath(arcCenter: skullCenter, radius: skullRadius, startAngle: 0.0, endAngle: CGFloat(2*M_PI), clockwise: false)
    skull.lineWidth = 3
    UIColor.blue.setFill()
    skull.stroke()
}