customize UIPageControl dots

问题

I'm currently trying to customize the UIPageControl so it will fit my needs. However I seem to be having a problem when implementing some logic in the draw

What I want to do is to be able to user IBInspectable variables to draw out the UIPageControl however those seem to still be nil when the draw method is being called and when I try to implement my logic in the awakeFromNib for instance it won't work.

What I did so far is the following

class BoardingPager: UIPageControl {
    @IBInspectable var size: CGSize!
    @IBInspectable var borderColor: UIColor!
    @IBInspectable var borderWidth: CGFloat! = 1

    override init(frame: CGRect) {
        super.init(frame: frame)
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        self.pageIndicatorTintColor = UIColor.clear
    }

    override func draw(_ rect: CGRect) {
        super.draw(rect)
        setDots()
    }

    func setDots() {
        for i in (0..<self.numberOfPages) {
            let dot = self.subviews[i]
            if size != nil {
                let dotFrame = CGRect(x: size.width/2, y: size.height/2, width: size.width, height: size.height)
                dot.frame = dotFrame
            }

            if i != self.currentPage {
                dot.layer.cornerRadius = dot.frame.size.height / 2
                dot.layer.borderColor = borderColor.cgColor
                dot.layer.borderWidth = borderWidth
            }
        }

    }
}

Another problem I'm facing is that I want to remove/add a border when the current page changes.

I'm hoping someone will be able to help me out

来源：https://stackoverflow.com/questions/42783598/customize-uipagecontrol-dots

标签

swift

xcode

draw

uipagecontrol