UILabel实现左右对齐 以及 String去掉空格

UILabel实现左右对齐 

static func getJustFieldLabelAttributetext(_ text:String)->NSMutableAttributedString {
        let paragraphStyle = NSMutableParagraphStyle.init()
        paragraphStyle.alignment = .justified
        let attriButting:NSMutableAttributedString = NSMutableAttributedString.init(string: text)
        attriButting.addAttribute(NSAttributedStringKey.font, value:UIFont.systemFont(ofSize: 17), range:NSMakeRange(0,text.count))
        paragraphStyle.lineSpacing = 5
        attriButting.addAttribute(NSAttributedStringKey.paragraphStyle, value: paragraphStyle, range: NSMakeRange(0,text.count))
        attriButting.addAttribute(NSAttributedStringKey.underlineStyle, value:NSNumber.init(value:Int8(NSUnderlineStyle.styleNone.rawValue)), range: NSMakeRange(0,text.count))
       return attriButting
    }

*String 去除头尾空格

static func getCraftMaterials(_ crafting: String) -> String{
         let whitespace =  NSCharacterSet.whitespacesAndNewlines
         return crafting.trimmingCharacters(in: whitespace)
    }

 *去掉首尾空格 包括后面的换行 \n

    var removeHeadAndTailSpacePro:String {
        let whitespace = NSCharacterSet.whitespacesAndNewlines
        return self.trimmingCharacters(in: whitespace)
    }

 *去掉所有空格

    var removeAllSapce: String {
        return self.replacingOccurrences(of: " ", with: "", options: .literal, range: nil)
    }

 *去掉首尾空格 后 指定开头空格数

    func beginSpaceNum(num: Int) -> String {
        var beginSpace = ""
        for _ in 0..<num {
            beginSpace += " "
        }
        return beginSpace + self.removeHeadAndTailSpacePro
    }