iOS 富文本NSAttributedString

NSAttributedString样式Demo

 self.view.backgroundColor = [UIColor grayColor];
 [self.view addSubview:self.attTV];
 //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 
//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

 NSParagraphStyle *paragraph = [[NSParagraphStyle alloc]init]; 
NSMutableParagraphStyle *muParagraph = [[NSMutableParagraphStyle alloc]init]; 
muParagraph.lineSpacing = 10; // 行距 
muParagraph.paragraphSpacing = 20; // 段距 muParagraph.firstLineHeadIndent = 30; // 首行缩进 
NSMutableAttributedString * attrStr = [[NSMutableAttributedString alloc] initWithData:[@"asdasdflhjlfsaiollzislooa" dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];
 NSRange range = NSMakeRange(0, attrStr.length); 

// 设置字体大小
 [attrStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:30] range:range];

 //字间距 
[attrStr addAttribute:NSKernAttributeName value:@(2) range:range]; 

// 字体倾斜
 [attrStr addAttribute:NSObliquenessAttributeName value:@(1) range:range];

 // 字体加粗
 [attrStr addAttribute:NSExpansionAttributeName value:@(0.5) range:range];

 // 下划线 
[attrStr addAttribute:NSUnderlineStyleAttributeName value:@(1) range:range]; [attrStr addAttribute:NSUnderlineColorAttributeName value:[UIColor blueColor] range:range];

 // 删除线
 [attrStr addAttribute:NSStrikethroughStyleAttributeName value:@(1) range:range]; [attrStr addAttribute:NSStrikethroughColorAttributeName value:[UIColor greenColor] range:range];

 // 连体字 
[attrStr addAttribute:NSLigatureAttributeName value:@(1) range:range]; 

// 设置颜色
 [attrStr addAttribute:NSForegroundColorAttributeName value:[UIColor colorWithRed:0.942 green:0.611 blue:0.771 alpha:1.000] range:range]; 

// 背景色 
[attrStr addAttribute:NSBackgroundColorAttributeName value:[UIColor colorWithRed:0.475 green:0.482 blue:0.942 alpha:1.000] range:range]; 
// stroke 
[attrStr addAttribute:NSStrokeColorAttributeName value:[UIColor blueColor] range:range]; [attrStr addAttribute:NSStrokeWidthAttributeName value:@(2) range:range]; 

// 设置段落样式
 [attrStr addAttribute:NSParagraphStyleAttributeName value:muParagraph range:range]; 

// 文本方向 
[attrStr addAttribute:NSVerticalGlyphFormAttributeName value:@(1) range:range];
 [attrStr addAttribute:NSWritingDirectionAttributeName value:@[@(2),@(3)] range:range]; 

// 阴影 
NSShadow *shadow = [[NSShadow alloc]init]; shadow.shadowOffset = CGSizeMake(2, 2);
 shadow.shadowColor = [UIColor orangeColor]; shadow.shadowBlurRadius = 1; [attrStr addAttribute:NSShadowAttributeName value:shadow range:range]; 

// 链接
 [attrStr addAttribute:NSLinkAttributeName value:[NSURL URLWithString:@"http://www.jianshu.com/p/8f49c9c99b21"] range:range]; 

// 文字中加图片
 NSTextAttachment *attachment=[[NSTextAttachment alloc] initWithData:nil ofType:nil]; 
UIImage *img=[UIImage imageNamed:@"test.png"]; 
attachment.image=img;
 attachment.bounds=CGRectMake(0, 0, 20, 20);
 [attrStr addAttribute:NSAttachmentAttributeName value:attachment range:range]; 

// 基准线偏移 
[attrStr addAttribute:NSBaselineOffsetAttributeName value:@(50) range:range]; 

self.label.attributedText = attrStr;

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
/*
文档类型NSDocumentTypeDocumentAttribute
 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

*/