Created
June 14, 2017 07:07
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| // | |
| // SpacingLabel.swift | |
| // SpacingLabel | |
| // | |
| // Created by Viet Nguyen Tran on 6/13/17. | |
| // Copyright © 2017 iossimple. All rights reserved. | |
| // | |
| import UIKit | |
| @IBDesignable | |
| class SpacingLabel: UILabel { | |
| @IBInspectable var lineHeight: CGFloat = 0 { | |
| didSet { | |
| updateSpacing() | |
| } | |
| } | |
| @IBInspectable var letterSpacing: CGFloat = 0 { | |
| didSet { | |
| updateSpacing() | |
| } | |
| } | |
| override var text: String? { | |
| didSet { | |
| updateSpacing() | |
| } | |
| } | |
| func updateSpacing() { | |
| if let text = self.text, text.characters.count != 0 { | |
| let attributedString = NSMutableAttributedString(string: text) | |
| let range = NSMakeRange(0, text.characters.count) | |
| // default attributes | |
| attributedString.addAttribute(NSFontAttributeName, value: self.font, range: range) | |
| attributedString.addAttribute(NSForegroundColorAttributeName, value: self.textColor, range: range) | |
| // lineHeight attribute | |
| if lineHeight != 0 { | |
| let paragraphStyle = NSMutableParagraphStyle() | |
| paragraphStyle.minimumLineHeight = lineHeight | |
| paragraphStyle.maximumLineHeight = lineHeight | |
| paragraphStyle.alignment = self.textAlignment // alignment from UILabel | |
| attributedString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: range) | |
| } | |
| // letter Spacing | |
| if letterSpacing != 0 { | |
| attributedString.addAttribute(NSKernAttributeName, value: letterSpacing, range: range) | |
| } | |
| // show label | |
| self.attributedText = attributedString | |
| } else { | |
| self.attributedText = nil | |
| } | |
| } | |
| } |
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