11

 1 - (void)setupTextView
 2 {
 3     // 富文本技术：
 4     // 1.图文混排
 5     // 2.随意修改文字样式
 6     //    self.textView.text = @"哈哈4365746875";
 7     //    self.textView.textColor = [UIColor blueColor];
 8     NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:@"哈哈123456"];
 9     // 设置“哈哈”为蓝色
10     [string addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(0, 2)];
11     [string addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:30] range:NSMakeRange(0, 2)];
12     [string addAttribute:NSBackgroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, 2)];
13     
14     // 设置“456”为红色
15     [string addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(6, 2)];
16     [string addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:24] range:NSMakeRange(6, 2)];
17     [string addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleSingle) range:NSMakeRange(6, 2)];
18     
19     // 创建图片图片附件
20     NSTextAttachment *attach = [[NSTextAttachment alloc] init];
21     attach.image = [UIImage imageNamed:@"placeholderHeader"];
22     attach.bounds = CGRectMake(0, 0, 15, 15);
23     NSAttributedString *attachString = [NSAttributedString attributedStringWithAttachment:attach];
24     
25     
26     [string appendAttributedString:attachString];
27     
28     [string appendAttributedString:[[NSAttributedString alloc] initWithString:@"789"]];
29     
30     self.textView.attributedText = string;

37 }


iOS 6之前：CoreText,纯C语言,极其蛋疼  
    
iOS 6开始：NSAttributedString,简单易用      

iOS 7开始：TextKit,功能强大,简单易用