Change UIButton border color on highlight

Question

I\'ve got a simple custom UIButton, to which I added:

button.layer.bordercolor = [[UIColor blueColor]CGColor];

However, I want to change the .b

Answer 1

For a solution that doesn't involve subclassing, you could always add an extension method to UIButton. E.g.

func setBackgroundColor(_ backgroundColor: UIColor,
                        borderColor: UIColor,
                        borderWidth: CGFloat,
                        cornerRadius: CGFloat,
                        forState state: UIControlState) {

    UIGraphicsBeginImageContext(bounds.size)
    guard let context = UIGraphicsGetCurrentContext() else { return }

    if borderWidth > 0 {
        layer.borderWidth = 0 // hide the layer's border if we're going to draw a border
    }

    context.addPath(UIBezierPath(roundedRect: bounds.insetBy(dx: borderWidth, dy: borderWidth), cornerRadius: cornerRadius).cgPath)
    context.setStrokeColor(borderColor.cgColor)
    context.setFillColor(backgroundColor.cgColor)
    context.setLineWidth(borderWidth)

    context.closePath()
    context.strokePath()
    context.fillPath()

    let buttonImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    setBackgroundImage(buttonImage, for: state)
}