NSMutableParagraphStyle文档

open class NSMutableParagraphStyle : NSParagraphStyle {

open var lineSpacing: CGFloat                  ///    文字行间距

open var paragraphSpacing: CGFloat      ///    文字段间距

open var alignment: NSTextAlignment     ///    文字对齐方式

open var firstLineHeadIndent: CGFloat    ///    文字首行缩进

open var headIndent: CGFloat                   ///    头缩进

open var tailIndent: CGFloat                       ///    尾缩进

open var lineBreakMode: NSLineBreakMode  ///   超出部分显示模式

open var minimumLineHeight: CGFloat      ///    最小行高

open var maximumLineHeight: CGFloat      ///    最大行高

open var baseWritingDirection: NSWritingDirection

open var lineHeightMultiple: CGFloat          ///    可变行高

open var paragraphSpacingBefore: CGFloat  ///   段前间距

open var hyphenationFactor: Float          ///    连字符

@available(iOS 7.0, *)
open var tabStops: [NSTextTab]!

@available(iOS 7.0, *)
open var defaultTabInterval: CGFloat

@available(iOS 9.0, *)
open var allowsDefaultTighteningForTruncation: Bool


@available(iOS 9.0, *)
open func addTabStop(_ anObject: NSTextTab)

@available(iOS 9.0, *)
open func removeTabStop(_ anObject: NSTextTab)


@available(iOS 9.0, *)
open func setParagraphStyle(_ obj: NSParagraphStyle)

}