Question

我正试图找到一种方法来设置我正在创建的笔画颜色的动画

circleLayer = CAShapeLayer()
circleLayer.path = circlePath.CGPath
circleLayer.lineCap =  kCALineCapRound
circleLayer.fillColor = UIColor.clearColor().CGColor
CABasicAnimation fill = CABasicAnimation.
circleLayer.strokeColor = UIColor(red: 0.4, green: 1.0, blue: 0.2, alpha: 0.5).CGColor
circleLayer.lineWidth = 20.0;
circleLayer.lineJoin = kCALineJoinRound
// Don't draw the circle initially
circleLayer.strokeEnd = 0.0

// Add the circleLayer to the view's layer's sublayers
layer.addSublayer(circleLayer)

我想要实现的是：当它被创建时（我在1秒的时间内创建它），颜色将自动生成。

Answer 1

找到解决方案。请享用。在创建CAShapeLayer之后：

        let animcolor = CABasicAnimation(keyPath: "strokeColor")
        animcolor.fromValue         = UIColor.greenColor().CGColor
        animcolor.toValue           = UIColor.orangeColor().CGColor
        animcolor.duration          = 1.0;
        animcolor.repeatCount       = 0;
        animcolor.autoreverses      = true
        circleLayer.addAnimation(animcolor, forKey: "strokeColor")

Swift-动画CAshapeLayer笔触颜色

1 个答案: