Question

我试图更快地完成项目的编译时间。我已阅读here和其他在线资源我的项目构建设置似乎是正确的：

优化无（仅调试）
仅针对活动架构构建是
编译DWARF

当需要在非常链接的方法中推断类型时，例如string.characters.split{}.map{}以及需要使用+运算符添加数组时，编译器似乎会变慢。使用这些建议我减少了编译时间，但这种方法在我的机器MBP 15＆＃39;上花了大约6秒钟。最后一个模型，我真的无法弄清楚原因。
这里有一条痕迹：

6102.4ms /../Views/CakeView.swift:221:10 func   changeArrowDirection（方向：ArrowDirection，动画：Bool =   默认）
  2463.5ms /../Views/CakeView.swift:71:9 final   didSet {}
  2189.8ms /../UIComponents/GradientView.swift:47:9 final   didSet {}

func changeArrowDirection(direction: ArrowDirection, animated: Bool = false) {
        let radius: CGFloat = min(bounds.size.width / 2.0, bounds.size.height / 2.0)
        let arrowBackgroundLayerRadius: CGFloat = radius / 2.0
        let tailWidth: CGFloat = arrowBackgroundLayerRadius / 4.0
        let headWidth: CGFloat = arrowBackgroundLayerRadius / 1.75
        let headlength: CGFloat = arrowBackgroundLayerRadius / 2.0
        let subArc: CGFloat = cos(asin(1.0 / (2.0 * arrowBackgroundLayerRadius)))

        let startPoint: CGPoint
        let endPoint: CGPoint

        switch direction {
        case .Up:
            startPoint = CGPoint(x: bounds.size.width / 2.0, y: bounds.size.height / 2.5 + arrowBackgroundLayerRadius - arrowBorderWidth - subArc - arrowCircleBorderWidth)
            endPoint = CGPoint(x: bounds.size.width / 2.0, y: bounds.size.height / 1.75  - arrowBackgroundLayerRadius + arrowCircleBorderWidth + arrowBorderWidth)
        case .Down:
            startPoint = CGPoint(x: bounds.size.width / 2.0, y: bounds.size.height / 1.75 - arrowBackgroundLayerRadius + arrowBorderWidth + subArc + arrowCircleBorderWidth)
            endPoint = CGPoint(x: bounds.size.width / 2.0, y: bounds.size.height / 2.5 + arrowBackgroundLayerRadius - arrowCircleBorderWidth - arrowBorderWidth)
        case .Left:
            startPoint = CGPoint(x: bounds.size.width / 2.0 - arrowBackgroundLayerRadius + arrowBorderWidth + subArc + arrowCircleBorderWidth, y: bounds.size.height / 2.0)
            endPoint = CGPoint(x: bounds.size.width / 2.0 + arrowBackgroundLayerRadius - arrowCircleBorderWidth - arrowBorderWidth,y: bounds.size.height / 2.0)
        case .Right:
            startPoint = CGPoint(x: bounds.size.width / 2.0 + arrowBackgroundLayerRadius - arrowBorderWidth - subArc - arrowCircleBorderWidth, y: bounds.size.height / 2.0)
            endPoint = CGPoint(x: bounds.size.width / 2.0 - arrowBackgroundLayerRadius + arrowCircleBorderWidth + arrowBorderWidth,y: bounds.size.height / 2.0)

        }

        arrowLayer.path = UIBezierPath.bezierPathWithArrowFromPoint(startPoint, endPoint: endPoint, tailWidth: tailWidth, headWidth: headWidth, headLength: headlength).CGPath
    }

有人能发现原因吗？

SWIFT Xcode 7.3构建特定方法的编译时间确实很慢

0 个答案: