Ich habe eine benutzerdefinierte Ansicht mit dem Hinzufügen von @ implementieCALayer als Unterschicht fürUIView. Wenn ich die Ansicht mit folgendem animiere:UIView.animateWithDuration(2.0) { self.slider.bounds.size *= 2.0}, die Skalierungsanimation ist irgendwie falsch. DasCALayer Beginnen Sie an der falschen Position mit der skalierten Größe und bewegen Sie sich zur endgültigen Position, anstatt mit der Ansicht zu skalieren.

Der CustomeView-Code:

import UIKit

class GridMaskView: UIView {
    private let cornerLayer: CAShapeLayer
    private let borderLayer: CAShapeLayer
    private let gridLayer: CAShapeLayer

    private let gridSize: (horizontal: UInt, vertical: UInt) = (3, 3)
    private let cornerThickness: CGFloat = 3.0
    private let cornerLength: CGFloat = 20.0
    private let borderThickness: CGFloat = 2.0
    private let gridThickness: CGFloat = 1.0
    private let lineColor: UIColor = UIColor(r: 120, g: 179, b: 193, a: 1)

    var showGridLines: Bool = true {
        didSet {
            gridLayer.hidden = !showGridLines
        }
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override init(frame: CGRect) {
        cornerLayer = CAShapeLayer()
        cornerLayer.fillColor = lineColor.CGColor

        borderLayer = CAShapeLayer()
        borderLayer.fillColor = UIColor.clearColor().CGColor
        borderLayer.strokeColor = lineColor.CGColor
        borderLayer.lineWidth = borderThickness

        gridLayer = CAShapeLayer()
        gridLayer.strokeColor = lineColor.CGColor
        gridLayer.lineWidth = gridThickness

        super.init(frame: frame)
        layer.addSublayer(cornerLayer)
        layer.addSublayer(borderLayer)
        layer.addSublayer(gridLayer)
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        layoutLayers()
    }

    private func layoutLayers() {
        drawCorner()
        drawBorder()
        drawGrid()
    }

    private func drawCorner() {
        cornerLayer.frame = bounds.insetBy(dx: -cornerThickness, dy: -cornerThickness)
        cornerLayer.path = cornerPath(forBounds: cornerLayer.bounds)
    }

    private func cornerPath(forBounds bounds: CGRect) -> CGPathRef {
        let horizontalSize = CGSize(width: cornerLength, height: cornerThickness)
        let verticalSize = CGSize(width: cornerThickness, height: cornerLength)

        let corners: [(CGRectEdge, CGRectEdge)] = [(.MinXEdge, .MinYEdge), (.MinXEdge, .MaxYEdge), (.MaxXEdge, .MinYEdge), (.MaxXEdge, .MaxYEdge)]

        var cornerRects = [CGRect]()
        for corner in corners {
            cornerRects.append(bounds.align(horizontalSize, corner: corner.0, corner.1))
            cornerRects.append(bounds.align(verticalSize, corner: corner.0, corner.1))
        }

        let cornerPath = CGPathCreateMutable()
        CGPathAddRects(cornerPath, nil, cornerRects, cornerRects.count)

        return cornerPath
    }

    private func drawBorder() {
        borderLayer.frame = bounds
        borderLayer.path = borderPath(forBounds: borderLayer.bounds)
    }

    private func borderPath(forBounds bounds: CGRect) -> CGPathRef {
        let borderPath = CGPathCreateMutable()
        let borderCornerPoints = [bounds.topLeft, bounds.topRight, bounds.bottomRight, bounds.bottomLeft, bounds.topLeft]
        CGPathAddLines(borderPath, nil, borderCornerPoints, borderCornerPoints.count)

        return borderPath
    }

    private func drawGrid() {
        gridLayer.frame = bounds
        gridLayer.path = gridPath(forBounds: gridLayer.bounds)
    }

    private func gridPath(forBounds bounds: CGRect) -> CGPathRef {
        let stepSize = bounds.size / (CGFloat(gridSize.horizontal), CGFloat(gridSize.vertical))

        let gridPath = CGPathCreateMutable()
        for i in (1...gridSize.vertical) {
            let x = CGFloat(i) * stepSize.width
            CGPathMoveToPoint(gridPath, nil, x, 0)
            CGPathAddLineToPoint(gridPath, nil, x, bounds.size.height)
        }

        for i in (1...gridSize.horizontal) {
            let y = CGFloat(i) * stepSize.height
            CGPathMoveToPoint(gridPath, nil, 0, y)
            CGPathAddLineToPoint(gridPath, nil, bounds.size.width, y)
        }
        return gridPath
    }

    override func intrinsicContentSize() -> CGSize {
        return CGSize(width: cornerLength * 2, height: cornerLength * 2)
    }
}

Weiß jemand, wie man das anpasst?