UITextField with left icon for Swift 3

HATextField

import UIKit

@IBDesignable
class HATextField: UITextField {
   
    override func textRect(forBounds bounds: CGRect) -> CGRect {
        return CGRect(x: bounds.origin.x + iconWidth*2, y: bounds.origin.y, width: bounds.width, height: bounds.height)
    }
    
    override func editingRect(forBounds bounds: CGRect) -> CGRect {
        return CGRect(x: bounds.origin.x + iconWidth*2, y: bounds.origin.y, width: bounds.width, height: bounds.height)
    }

    // Provides left padding for images
    override func leftViewRect(forBounds bounds: CGRect) -> CGRect {
        var textRect = super.leftViewRect(forBounds: bounds)
        textRect.origin.x += leftPadding
        layer.cornerRadius = radius
        return textRect
    }
    
    @IBInspectable var leftImage: UIImage? {
        didSet {
            updateView()
        }
    }
    
    var iconWidth: CGFloat = 20
    
    @IBInspectable var leftPadding: CGFloat = 0
    
    @IBInspectable var radius: CGFloat = 0
    
    @IBInspectable var color: UIColor = UIColor.lightGray {
        didSet {
            updateView()
        }
    }
    
    func updateView() {
        if let image = leftImage {
            leftViewMode = UITextFieldViewMode.always
            let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: iconWidth, height: iconWidth))
            imageView.image = image
            // Note: In order for your image to use the tint color, you have to select the image in the Assets.xcassets and change the "Render As" property to "Template Image".
            imageView.tintColor = color
            leftView = imageView
        } else {
            leftViewMode = UITextFieldViewMode.never
            leftView = nil
        }
        
        // Placeholder text color
        attributedPlaceholder = NSAttributedString(string: placeholder != nil ?  placeholder! : "", attributes:[NSForegroundColorAttributeName: color])
    }
}