13

如何使用 CAShapeLayer 绘制同时具有边框颜色、边框宽度和填充颜色的线条？

这是我尝试过的，但它永远是蓝色的......

self.lineShape.strokeColor = [UIColor blueColor].CGColor;
self.lineShape.fillColor = [UIColor greenColor].CGColor;
self.lineShape.lineWidth = 100;
self.lineShape.lineCap = kCALineCapRound;
self.lineShape.lineJoin = kCALineJoinRound;
UIBezierPath* path = [UIBezierPath bezierPath];
[path moveToPoint:self.lineStart];
[path addLineToPoint:self.lineEnd];
self.lineShape.path = path.CGPath;
4

3 回答 3

15

Swift 3+ 扩展方法（结合下面的 AechoLiu 答案）：

// Usage:
self.btnGroup.roundCorner([.topRight, .bottomRight], radius: 4.0, borderColor: UIColor.red, borderWidth: 1.0)

// Apply round corner and border. An extension method of UIView.
public func roundCorner(_ corners: UIRectCorner, radius: CGFloat, borderColor: UIColor, borderWidth: CGFloat) {

let path = UIBezierPath.init(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))

let mask = CAShapeLayer()
mask.path = path.cgPath
self.layer.mask = mask

let borderPath = UIBezierPath.init(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
let borderLayer = CAShapeLayer()
borderLayer.path = borderPath.cgPath
borderLayer.lineWidth = borderWidth
borderLayer.strokeColor = borderColor.cgColor
borderLayer.fillColor = UIColor.clear.cgColor
borderLayer.frame = self.bounds
self.layer.addSublayer(borderLayer)

}

目标-C：

self.lineShapeBorder = [[CAShapeLayer alloc] init];
self.lineShapeBorder.zPosition = 0.0f;
self.lineShapeBorder.strokeColor = [UIColor blueColor].CGColor;
self.lineShapeBorder.lineWidth = 25;
self.lineShapeBorder.lineCap = kCALineCapRound;
self.lineShapeBorder.lineJoin = kCALineJoinRound;
     
self.lineShapeFill = [[CAShapeLayer alloc] init];
[self.lineShapeBorder addSublayer:self.lineShapeFill];
self.lineShapeFill.zPosition = 0.0f;
self.lineShapeFill.strokeColor = [UIColor greenColor].CGColor;
self.lineShapeFill.lineWidth = 20.0f;
self.lineShapeFill.lineCap = kCALineCapRound;
self.lineShapeFill.lineJoin = kCALineJoinRound;
  
// ...
    
UIBezierPath* path = [UIBezierPath bezierPath];
[path moveToPoint:self.lineStart];
[path addLineToPoint:self.lineEnd];
// call addLineToPoint over and over to create the outline for the shape
self.lineShapeBorder.path = self.lineShapeFill.path = path.CGPath;

还喊出@FarrasDoko 评论以尝试更改borderWidth为lineWidth和。borderColorstrokeColor

于 2012-10-06T05:45:18.303 回答
9

如果您将图层的fillColor属性设置为非nil透明或透明，则图层将填充其路径。

如果将图层设置为lineWidth大于零的数字，并且将其设置strokeColor为非nil透明或透明，则图层将描边其路径。

如果您设置了所有这些属性，图层将填充并描边其路径。它在填充后绘制笔画。

图层的路径实际上必须包围一些区域才能填充任何东西。在您的帖子中，您将路径设置为：

UIBezierPath* path = [UIBezierPath bezierPath];
[path moveToPoint:self.lineStart];
[path addLineToPoint:self.lineEnd];
self.lineShape.path = path.CGPath;

该路径包含一条线段。它不包围任何区域，因此该层没有任何东西可以填充。

于 2012-10-06T05:13:55.880 回答
7

在 Swift 3. 中的扩展方法UIView。

// Usage:
self.btnGroup.roundCorner([.topRight, .bottomRight], radius: 4.0, borderColor: UIColor.red, borderWidth: 1.0)

// Apply round corner and border. An extension method of UIView.
public func roundCorner(_ corners: UIRectCorner, radius: CGFloat, borderColor: UIColor, borderWidth: CGFloat) {
    let path = UIBezierPath.init(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))

    let mask = CAShapeLayer()
    mask.path = path.cgPath
    self.layer.mask = mask

    let borderPath = UIBezierPath.init(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
    let borderLayer = CAShapeLayer()
    borderLayer.path = borderPath.cgPath
    borderLayer.lineWidth = borderWidth
    borderLayer.strokeColor = borderColor.cgColor
    borderLayer.fillColor = UIColor.clear.cgColor
    borderLayer.frame = self.bounds
    self.layer.addSublayer(borderLayer)
}
于 2017-11-23T03:06:05.673 回答