NSAttributedString/NSMutableAttributedString

• 返回給定索引處字符的屬性

    //range:返回有多少個連續(xù)的字符有相同的屬性,不需要的話填寫 null
    - (NSDictionary *)attributesAtIndex:(NSUInteger)index effectiveRange:(NSRangePointer)range;
  

• 把NSAttributedString(屬性字符串)轉(zhuǎn)換為 NSString
  - (NSString *)string

• 在指定范圍內(nèi)添加屬性
  - (void)addAttribute:(NSString *)name value:(id)value range:(NSRange)aRange

• 在指定范圍內(nèi)設(shè)置屬性
  - (void)setAttributes:(NSDictionary<NSString *,id> *)attributes range:(NSRange)aRange

• 在指定范圍內(nèi)刪除屬性
  - (void)removeAttribute:(NSString *)name range:(NSRange)aRange

• 屬性字典

    NSFontAttributeName: - 字體(UIFont *)
    NSParagraphStyleAttributeName: - 段落(NSParagraphStyle * / NSMutableParagraphStyle *)
    NSForegroundColorAttributeName - 前景顏色(UIColor *)
    NSBackgroundColorAttributeName:- 背景顏色(UIColor *)
    NSLigatureAttributeName;
    NSKernAttributeName;
    NSStrikethroughStyleAttributeName;
    NSUnderlineStyleAttributeName: - 下劃線樣式屬性名(NSUnderlineStyle,結(jié)構(gòu)體)
    NSStrokeColorAttributeName: - 邊框顏色(UIColor *)
    NSStrokeWidthAttributeName: - 邊寬(NSNumber *)
    NSShadowAttributeName;
    NSTextEffectAttributeName;
    NSAttachmentAttributeName;
    NSLinkAttributeName;
    NSBaselineOffsetAttributeName;
    NSUnderlineColorAttributeName: - 下劃線顏色
    NSStrikethroughColorAttributeName;
    NSObliquenessAttributeName;
    NSExpansionAttributeName;
    NSWritingDirectionAttributeName;
    NSVerticalGlyphFormAttributeName;
  

• 在哪兒使用 NSAttributedString ?

  • UIButton
    - (void)setAttributedTitle:(NSAttributedString *)title forState: ;

  • UILabel
    - @property (nonatomic,strong) NSAttributedString *attributedText;

  • UITextView
    - @property (nonatomic,readonly) NSTextStorage *textStorage;