UILabel wrapper can set padding at utility panel.

paddingLabel.swift

// source: http://www.cnblogs.com/over140/p/4837652.html

class UILabelPadding : UILabel {
    
    private var padding = UIEdgeInsets.zero
    
    @IBInspectable
    var paddingLeft: CGFloat {
        get { return padding.left }
        set { padding.left = newValue }
    }
    
    @IBInspectable
    var paddingRight: CGFloat {
        get { return padding.right }
        set { padding.right = newValue }
    }
    
    @IBInspectable
    var paddingTop: CGFloat {
        get { return padding.top }
        set { padding.top = newValue }
    }
    
    @IBInspectable
    var paddingBottom: CGFloat {
        get { return padding.bottom }
        set { padding.bottom = newValue }
    }
    
    override func drawText(in rect: CGRect) {
        super.drawText(in: UIEdgeInsetsInsetRect(rect, padding))
    }
    
    override func textRect(forBounds bounds: CGRect, limitedToNumberOfLines numberOfLines: Int) -> CGRect {
        let insets = self.padding
        var rect = super.textRect(forBounds: UIEdgeInsetsInsetRect(bounds, insets), limitedToNumberOfLines: numberOfLines)
        rect.origin.x    -= insets.left
        rect.origin.y    -= insets.top
        rect.size.width  += (insets.left + insets.right)
        rect.size.height += (insets.top + insets.bottom)
        return rect
    }
    
}