How To Change UIView's Border Color And Thickness in Cocoa Touch?

In this article we'll learn how to change a View's border color and thickness.

This can be done in two ways as mentioned below.

Method 1 − Writing the code

Let's suppose we have a view name backView, then to add a border color and thickness we can write

backView.layer.borderWidth = 5 // Or any integer value

backView.layer.bordercolor = colorLiteral(red: 0.09019608051, green: 0, blue: 0.3019607961, alpha: 1) this code will add a border of 5 width and a dark blue color. Below is the output is produces.

Method 2 − Creating an extension of UIView with designable and inspectable

@IBDesignable
class DesignableView: UIView {
}
extension UIView {
   @IBInspectable
   var borderWidth: CGFloat {
      get {
         return layer.borderWidth
      }
      set {
         layer.borderWidth = newValue
      }
   }
   @IBInspectable
   var borderColor: UIColor? {
     get {
         if let color = layer.borderColor {
            return UIColor(cgColor: color)
         }
         return nil
      }
      set {
         if let color = newValue {
            layer.borderColor = color.cgColor
         }
          else {
            layer.borderColor = nil
         }
      }
   }
}

The above will create an editable Storyboard, which will render live changes on the storyboard when edited from the attribute inspector.

Below is the output for method 2 showing how it renders live on storyboard.