UILabel设置行间距

fileprivatefuncgetAttributeStringWithString(_string:String,font:CGFloat

) ->NSAttributedString{

letattributedString =NSMutableAttributedString(string: string)

letparagraphStye =NSMutableParagraphStyle()

//调整行间距

paragraphStye.lineSpacing= font/2

letrang =NSMakeRange(0,CFStringGetLength(stringasCFString!))

attributedString .addAttribute(NSParagraphStyleAttributeName, value: paragraphStye, range: rang)

returnattributedString

}

---

//

//String+hexa.swift

//hexa

//

//Created by郭源on 16/8/5.

//Copyright © 2016年vincross. All rights reserved.

//

importUIKit

extensionNSMutableAttributedString{

funcfont(_font:UIFont, range:NSRange? =nil) ->NSMutableAttributedString{

addAttributes([NSFontAttributeName: font], range: range ?? textRange)

returnself

}

functextColor(_textColor:UIColor, range:NSRange? =nil) ->NSMutableAttributedString{

addAttributes([NSForegroundColorAttributeName: textColor], range: range ?? textRange)

returnself

}

funclineSpace(_lineSpace:CGFloat, range:NSRange? =nil) ->NSMutableAttributedString{

guard!string.isEmptyelse{returnself}

letparagraph = (attribute(NSParagraphStyleAttributeName, at:0, effectiveRange:nil)as?NSMutableParagraphStyle) ?? (NSMutableParagraphStyle.default.mutableCopy()as!NSMutableParagraphStyle)

paragraph.lineSpacing = lineSpace

addAttributes([NSParagraphStyleAttributeName: paragraph], range: range ?? textRange)

returnself

}

funcalignment(_alignment:NSTextAlignment, range:NSRange? =nil) ->NSMutableAttributedString{

guard!string.isEmptyelse{returnself}

letparagraph = (attribute(NSParagraphStyleAttributeName, at:0, effectiveRange:nil)as?NSMutableParagraphStyle) ?? (NSMutableParagraphStyle.default.mutableCopy()as!NSMutableParagraphStyle)

paragraph.alignment = alignment

addAttributes([NSParagraphStyleAttributeName: paragraph], range: range ?? textRange)

returnself

}

funcunderlineStyle(_underlineStyle:NSUnderlineStyle, range:NSRange? =nil) ->NSMutableAttributedString{

addAttributes([NSUnderlineStyleAttributeName: underlineStyle.rawValue], range: range ?? textRange)

returnself

}

funcbaselineOffset(_offset:Int, range:NSRange? =nil) ->NSMutableAttributedString{

addAttribute(NSBaselineOffsetAttributeName, value: NSNumber(integerLiteral: offset), range: range ?? textRange)

returnself

}

fileprivatevartextRange:NSRange{

returnNSMakeRange(0, length)

}

}

extensionString{

varattr:NSMutableAttributedString{

returnNSMutableAttributedString(string:self)

}

funcstringRect(with font:UIFont= .hexa_systemFont(ofSize:12) , size:CGSize= CGSize(width: CGFloat.infinity, height: CGFloat.infinity))->CGSize{

letattrStr = attr.font(font)

returnattrStr.boundingRect(with: size, options: NSStringDrawingOptions.usesLineFragmentOrigin, context:nil).size

}

}