【iOS】PaddingがあるUILabel

PaddingLabel.swift

import UIKit

final class PaddingLabel: UILabel {

    private let height: CGFloat = 16

    private let contentInsets: UIEdgeInsets = {
        let hPadding: CGFloat = 6, vPadding: CGFloat = 2
        let contentInsets = UIEdgeInsets(top: vPadding, left: hPadding, bottom: vPadding, right: hPadding)
        return contentInsets
    }()


    override func awakeFromNib() {
        super.awakeFromNib()

        textColor = .white
        font = UIFont.boldSystemFont(ofSize: 10)
        numberOfLines = 1
        layer.cornerRadius = height / 2
        clipsToBounds = true
    }

    override func layoutSubviews() {
        super.layoutSubviews()

        sizeToFit()
    }

    override func draw(_ rect: CGRect) {
        let insetsInsetRect = UIEdgeInsetsInsetRect(rect, contentInsets)

        return super.drawText(in: insetsInsetRect)
    }

    override func sizeThatFits(_ size: CGSize) -> CGSize {
        var contentSize = size
        let hOffset = contentInsets.left + contentInsets.right
        let vOffset = contentInsets.top + contentInsets.bottom

        contentSize.width -= hOffset
        contentSize.height -= vOffset

        var baseSize = super.sizeThatFits(contentSize)
        baseSize.width += hOffset
        baseSize.height += vOffset

        return baseSize
    }

}