dashed border UIImageView swift

Question

I'm trying to add a dashed border using CALayer on a UIImageView. I've found a method, but is that working in swift and how can i convert it to swift? o have another imageView which has a border so would be the best solution to use CALayer, so they look similar? How can i obtain this

obj-c code to swift?

- (CAShapeLayer *) addDashedBorderWithColor: (CGColorRef) color {
    CAShapeLayer *shapeLayer = [CAShapeLayer layer];

    CGSize frameSize = self.size;

    CGRect shapeRect = CGRectMake(0.0f, 0.0f, frameSize.width, frameSize.height);
    [shapeLayer setBounds:shapeRect];
    [shapeLayer setPosition:CGPointMake( frameSize.width/2,frameSize.height/2)];

    [shapeLayer setFillColor:[[UIColor clearColor] CGColor]];
    [shapeLayer setStrokeColor:color];
    [shapeLayer setLineWidth:5.0f];
    [shapeLayer setLineJoin:kCALineJoinRound];
    [shapeLayer setLineDashPattern:
    [NSArray arrayWithObjects:[NSNumber numberWithInt:10],
    [NSNumber numberWithInt:5],
  nil]];
    UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:shapeRect cornerRadius:15.0];
    [shapeLayer setPath:path.CGPath];

    return shapeLayer;
}

Answer 1

Ok, I would do simply like this in the custom view class:

Updated for Swift 4

class DashedBorderView: UIView {

    let _border = CAShapeLayer()

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        setup()
    }

    init() {
        super.init(frame: .zero)
        setup()
    }

    func setup() {
        _border.strokeColor = UIColor.black.cgColor
        _border.fillColor = nil
        _border.lineDashPattern = [4, 4]
        self.layer.addSublayer(_border)
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        _border.path = UIBezierPath(roundedRect: self.bounds, cornerRadius:10).cgPath
        _border.frame = self.bounds
    }
}