InsetLabel.swift

import UIKit

class InsetLabel: UILabel {
    
    private let topInset: CGFloat
    private let leftInset: CGFloat
    private let bottomInset: CGFloat
    private let rightInset: CGFloat
    
    init(top: CGFloat, left: CGFloat, bottom: CGFloat, right: CGFloat) {
        self.topInset = top
        self.leftInset = left
        self.bottomInset = bottom
        self.rightInset = right
        
        super.init(frame: .zero)
    }
    
    convenience override init(frame: CGRect) {
        self.init(top: 0, left: 0, bottom: 0, right: 0)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    var insets: UIEdgeInsets {
        return UIEdgeInsets(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
    }
    
    override func drawText(in rect: CGRect) {
        super.drawText(in: UIEdgeInsetsInsetRect(rect, insets))
    }
    
    override func sizeThatFits(_ size: CGSize) -> CGSize {
        var adjSize = super.sizeThatFits(size)
        adjSize.width += leftInset + rightInset
        adjSize.height += topInset + bottomInset
        
        return adjSize
    }
    
    override var intrinsicContentSize: CGSize {
        var contentSize = super.intrinsicContentSize
        contentSize.width += leftInset + rightInset
        contentSize.height += topInset + bottomInset
        
        return contentSize
    }
}