Triangle UIView - Swift

Question

So I\'m making a game in which I am dropping objects which have to be destroyed by a spike(triangle) at the bottom of the screen by a user.

I cannot work out how to

Answer 1

I've modified the previous code a bit to add margin and fill color as inspectable and it works well with Swift4:

import UIKit

@IBDesignable
class TriangleView : UIView {
    var _color: UIColor! = UIColor.blue
    var _margin: CGFloat! = 0

    @IBInspectable var margin: Double {
        get { return Double(_margin)}
        set { _margin = CGFloat(newValue)}
    }


    @IBInspectable var fillColor: UIColor? {
        get { return _color }
        set{ _color = newValue }
    }

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

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

    override func draw(_ rect: CGRect) {

        guard let context = UIGraphicsGetCurrentContext() else { return }

        context.beginPath()
        context.move(to: CGPoint(x: rect.minX + _margin, y: rect.maxY - _margin))
        context.addLine(to: CGPoint(x: rect.maxX - _margin, y: rect.maxY - _margin))
        context.addLine(to: CGPoint(x: (rect.maxX / 2.0), y: rect.minY + _margin))
        context.closePath()

        context.setFillColor(_color.cgColor)
        context.fillPath()
    }
}