iOS NSParagraphStyle

1: 父类

继承于: NSObject

2: 属性

//获取具有默认样式设置的NSParagraphStyle实例, 其值与 [[NSParagraphStyle alloc] init] 的结果相同
@property (class, readonly, copy, NS_NONATOMIC_IOSONLY) NSParagraphStyle *defaultParagraphStyle; 

//行间距
@property (readonly, NS_NONATOMIC_IOSONLY) CGFloat lineSpacing;

//这一段的底部和下一段的顶部之间的距离(或下一段的"页眉", 如果有的话);  类似于页脚;
@property (readonly, NS_NONATOMIC_IOSONLY) CGFloat paragraphSpacing;

//对齐方式
@property (readonly, NS_NONATOMIC_IOSONLY) NSTextAlignment alignment;

////整段缩进(首行除外)
@property (readonly, NS_NONATOMIC_IOSONLY) CGFloat headIndent;

//
@property (readonly, NS_NONATOMIC_IOSONLY) CGFloat tailIndent;

//首行缩进距离
@property (readonly, NS_NONATOMIC_IOSONLY) CGFloat firstLineHeadIndent;

//最小行高
@property (readonly, NS_NONATOMIC_IOSONLY) CGFloat minimumLineHeight;

//最大行高
@property (readonly, NS_NONATOMIC_IOSONLY) CGFloat maximumLineHeight;

//换行模式
@property (readonly, NS_NONATOMIC_IOSONLY) NSLineBreakMode lineBreakMode;

//书写方向
@property (readonly, NS_NONATOMIC_IOSONLY) NSWritingDirection baseWritingDirection;

//
@property (readonly, NS_NONATOMIC_IOSONLY) CGFloat lineHeightMultiple;

//前一段的底部(或前一段的 "页脚", 如果有的话)和这段顶部之间的距离;  类似于页眉;
@property (readonly, NS_NONATOMIC_IOSONLY) CGFloat paragraphSpacingBefore;

//
@property (readonly, NS_NONATOMIC_IOSONLY) float hyphenationFactor;

//
@property (readonly,copy, NS_NONATOMIC_IOSONLY) NSArray<NSTextTab *> *tabStops;

//
@property (readonly, NS_NONATOMIC_IOSONLY) CGFloat defaultTabInterval;

//
@property (readonly, NS_NONATOMIC_IOSONLY) BOOL allowsDefaultTighteningForTruncation;

3: 方法

/**
 返回指定语言的默认写入方向

 *ISO语言区域格式指定的语言. 可以为nil, 返回从用户的默认数据库中派生的默认写入方向
 */
+ (NSWritingDirection)defaultWritingDirectionForLanguage:(nullable NSString *)languageName;