参考
iOS中关于AttributedString的那些事儿
iOS 7中文字排版和渲染引擎——Text Kit
富文本的所有属性
//NSFontAttributeName 字号 UIFont 默认12
//NSParagraphStyleAttributeName 段落样式 NSParagraphStyle
//NSForegroundColorAttributeName 前景色 UIColor
//NSBackgroundColorAttributeName 背景色 UIColor
//NSObliquenessAttributeName 字体倾斜 NSNumber
//NSExpansionAttributeName 字体加粗 NSNumber 比例 0就是不变 1增加一倍
//NSKernAttributeName 字间距 CGFloat
//NSUnderlineStyleAttributeName 下划线 1或0
//NSUnderlineColorAttributeName 下划线颜色
//NSStrikethroughStyleAttributeName 删除线 1或0
//NSStrikethroughColorAttributeName 某种颜色
//NSStrokeColorAttributeName same as ForegroundColor
//NSStrokeWidthAttributeName CGFloat
//NSLigatureAttributeName 连笔字 1或0 没看出效果
// NSStrokeWidthAttributeName 设置笔画宽度，取值为 NSNumber 对象（整数），负值填充效果，正值中空效果
//NSShadowAttributeName 阴影 NSShawdow
//NSTextEffectAttributeName 设置文本特殊效果，取值为 NSString 对象，目前只有图版印刷效果可用：
//NSAttachmentAttributeName NSTextAttachment 设置文本附件,常用插入图片
//NSLinkAttributeName 链接 NSURL (preferred) or NSString
//NSBaselineOffsetAttributeName 基准线偏移 NSNumber
//NSWritingDirectionAttributeName 文字方向 @[@(1),@(2)] 分别代表不同的文字出现方向等等，我想你一定用不到它 - -
//NSVerticalGlyphFormAttributeName 水平或者竖直文本 1竖直 0水平 在iOS没卵用，不支持竖版
NSAttributedString
@property (readonly, copy) NSString *string;
- (NSDictionary<NSString *, id> *)attributesAtIndex:(NSUInteger)location effectiveRange:(nullable NSRangePointer)range;
@property (readonly) NSUInteger length;
- (nullable id)attribute:(NSString *)attrName atIndex:(NSUInteger)location effectiveRange:(nullable NSRangePointer)range;
- (NSAttributedString *)attributedSubstringFromRange:(NSRange)range;
- (NSDictionary<NSString *, id> *)attributesAtIndex:(NSUInteger)location longestEffectiveRange:(nullable NSRangePointer)range inRange:(NSRange)rangeLimit;
- (nullable id)attribute:(NSString *)attrName atIndex:(NSUInteger)location longestEffectiveRange:(nullable NSRangePointer)range inRange:(NSRange)rangeLimit;
- (BOOL)isEqualToAttributedString:(NSAttributedString *)other;
- (instancetype)initWithString:(NSString *)str;
- (instancetype)initWithString:(NSString *)str attributes:(nullable NSDictionary<NSString *, id> *)attrs;
- (instancetype)initWithAttributedString:(NSAttributedString *)attrStr;
typedef NS_OPTIONS(NSUInteger, NSAttributedStringEnumerationOptions) {
NSAttributedStringEnumerationReverse = (1UL << 1),
NSAttributedStringEnumerationLongestEffectiveRangeNotRequired = (1UL << 20)
};
- (void)enumerateAttributesInRange:(NSRange)enumerationRange options:(NSAttributedStringEnumerationOptions)opts usingBlock:(void (NS_NOESCAPE ^)(NSDictionary<NSString *, id> *attrs, NSRange range, BOOL *stop))block NS_AVAILABLE(10_6, 4_0);
- (void)enumerateAttribute:(NSString *)attrName inRange:(NSRange)enumerationRange options:(NSAttributedStringEnumerationOptions)opts usingBlock:(void (NS_NOESCAPE ^)(id _Nullable value, NSRange range, BOOL *stop))block NS_AVAILABLE(10_6, 4_0);
@interface NSMutableAttributedString : NSAttributedString
- (void)replaceCharactersInRange:(NSRange)range withString:(NSString *)str;
- (void)setAttributes:(nullable NSDictionary<NSString *, id> *)attrs range:(NSRange)range;
@end
@interface NSMutableAttributedString (NSExtendedMutableAttributedString)
@property (readonly, retain) NSMutableString *mutableString;
- (void)addAttribute:(NSString *)name value:(id)value range:(NSRange)range;
- (void)addAttributes:(NSDictionary<NSString *, id> *)attrs range:(NSRange)range;
- (void)removeAttribute:(NSString *)name range:(NSRange)range;
- (void)replaceCharactersInRange:(NSRange)range withAttributedString:(NSAttributedString *)attrString;
- (void)insertAttributedString:(NSAttributedString *)attrString atIndex:(NSUInteger)loc;
- (void)appendAttributedString:(NSAttributedString *)attrString;
- (void)deleteCharactersInRange:(NSRange)range;
- (void)setAttributedString:(NSAttributedString *)attrString;
- (void)beginEditing;
- (void)endEditing;
@end
段落样式
段落样式主要改行距、段距、首行缩进、最大最小行高、多倍行距等十几个属性，把这些总结了你就比我更全..
//NSMutableParagraphStyle 同 NSParagraphStyle
NSMutableParagraphStyle *muParagraph = [[NSMutableParagraphStyle alloc]init];
muParagraph.lineSpacing = 10; // 行距
muParagraph.paragraphSpacing = 20; // 段距
muParagraph.firstLineHeadIndent = 30; // 首行缩进
paragraphStyle.alignment = NSTextAlignmentJustified;//（两端对齐的）文本对齐方式：（左，中，右，两端对齐，自然）
paragraphStyle.lineBreakMode = NSLineBreakByTruncatingTail;//结尾部分的内容以……方式省略 ( "...wxyz" ,"abcd..." ,"ab...yz")
paragraphStyle.headIndent = 20;//整体缩进(首行除外)
paragraphStyle.tailIndent = 20;//
paragraphStyle.minimumLineHeight = 10;//最低行高
paragraphStyle.maximumLineHeight = 20;//最大行高
paragraphStyle.paragraphSpacing = 15;//段与段之间的间距
paragraphStyle.paragraphSpacingBefore = 22.0f;//段首行空白空间/* Distance between the bottom of the previous paragraph (or the end of its paragraphSpacing, if any) and the top of this paragraph. */
paragraphStyle.baseWritingDirection = NSWritingDirectionLeftToRight;//从左到右的书写方向（一共➡️三种）
paragraphStyle.lineHeightMultiple = 15;/* Natural line height is multiplied by this factor (if positive) before being constrained by minimum and maximum line height. */
paragraphStyle.hyphenationFactor = 1;//连字属性 在iOS，唯一支持的值分别为0和1
附件(图片)
NSTextAttachment *attachment=[[NSTextAttachment alloc] initWithData:nil ofType:nil];
UIImage *img=[UIImage imageNamed:@"test.png"];
attachment.image=img;
attachment.bounds=CGRectMake(0, 0, 20, 20);
NSAttributedString *attachmentString = [NSAttributedString attributedStringWithAttachment:textAttachment];
加载HTML标签文本
NSMutableAttributedString * attrStr = [[NSMutableAttributedString alloc] initWithData:[str dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];
参数options里面的字典有三对key value
NSPlainTextDocumentType // 普通文本
NSRTFTextDocumentType // 富文本
NSRTFDTextDocumentType // 带附件的富文本
NSHTMLTextDocumentType // 这个可以加载HTML格式的文本
UITextView
@property(nonatomic) NSRange selectedRange;
@property(null_resettable,copy) NSAttributedString *attributedText
@property(nonatomic,copy) NSDictionary<NSString *, id> *typingAttributes NS_AVAILABLE_IOS(6_0); // automatically resets when the selection changes
- (void)scrollRangeToVisible:(NSRange)range;
@property (nullable, readwrite, strong) UIView *inputView;
@property (nullable, readwrite, strong) UIView *inputAccessoryView;
// Get the text container for the text view
@property(nonatomic,readonly) NSTextContainer *textContainer NS_AVAILABLE_IOS(7_0);
// Inset the text container's layout area within the text view's content area
@property(nonatomic, assign) UIEdgeInsets textContainerInset NS_AVAILABLE_IOS(7_0);
// Convenience accessors (access through the text container)
@property(nonatomic,readonly) NSLayoutManager *layoutManager NS_AVAILABLE_IOS(7_0);
@property(nonatomic,readonly,strong) NSTextStorage *textStorage NS_AVAILABLE_IOS(7_0);
@property(nonatomic) UIDataDetectorTypes dataDetectorTypes NS_AVAILABLE_IOS(3_0) __TVOS_PROHIBITED;
@protocol UITextViewDelegate <NSObject, UIScrollViewDelegate>
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text;
- (void)textViewDidChangeSelection:(UITextView *)textView;
