UILabel改變行間距、字間距（swift）
阿新 • • 發佈：2019-01-10
有時候根據需求需要改變label字與字或行與行之間間距大小，但系統並沒有提供這樣的方法，下面我對label寫了一個延展來實現這一功能！
extension UILabel {
/** 改變行間距 */ func changeLineSpace(space:CGFloat) { if self.text == nil || self.text == "" { return } let text = self.text let attributedString = NSMutableAttributedString.init(string: text!) let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.lineSpacing = space attributedString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: .init(location: 0, length: (text?.length())!)) self.attributedText = attributedString self.sizeToFit() } /** 改變字間距 */ func changeWordSpace(space:CGFloat) { if self.text == nil || self.text == "" { return } let text = self.text let attributedString = NSMutableAttributedString.init(string: text!, attributes: [NSKernAttributeName:space]) let paragraphStyle = NSMutableParagraphStyle() attributedString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: .init(location: 0, length: (text?.length())!)) self.attributedText = attributedString self.sizeToFit() } /** 改變字間距和行間距 */ func changeSpace(lineSpace:CGFloat, wordSpace:CGFloat) { if self.text == nil || self.text == "" { return } let text = self.text let attributedString = NSMutableAttributedString.init(string: text!, attributes: [NSKernAttributeName:wordSpace]) let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.lineSpacing = lineSpace attributedString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: .init(location: 0, length: (text?.length())!)) self.attributedText = attributedString self.sizeToFit() } 趕快試一下吧！
}