1 #import <Foundation/Foundation.h>
 2
 3 @interface filterHTML : NSObject
 4 //过滤
 5 /**
 6  * 过滤标签
 7  */
 8 +(NSString *)filterHTML:(NSString *)str;
 9 +(NSString *)filterHTMLImage:(NSString *)str;
10 /**
11  * 替换部分标签
12  */
13 + (NSString *)filterHTMLTag:(NSString *)str;
14
15
16 @end

 1 #import "filterHTML.h"
 2
 3 @implementation filterHTML
 4
 5 /**
 6  * 过滤标签
 7  */
 8 +(NSString *)filterHTML:(NSString *)str
 9 {
10     NSScanner * scanner = [NSScanner scannerWithString:str];
11     NSString * text = nil;
12     while([scanner isAtEnd]==NO)
13     {
14         //找到标签的起始位置
15         [scanner scanUpToString:@"<" intoString:nil];
16         //找到标签的结束位置
17         [scanner scanUpToString:@">" intoString:&text];
18         //替换字符
19         str  =  [str  stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@>",text] withString:@""];
20     }
21     return str;
22 }
23 +(NSString *)filterHTMLImage:(NSString *)str{
24     NSScanner * scanner = [NSScanner scannerWithString:str];
25     NSString * text = nil;
26     while([scanner isAtEnd]==NO)
27     {
28         //找到标签的起始位置
29         [scanner scanUpToString:@"<img" intoString:nil];
30         //找到标签的结束位置
31         [scanner scanUpToString:@">" intoString:&text];
32         //替换字符
33         str  =  [str  stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@>",text] withString:@"【图片】"];
34     }
35     return str;
36 }
37
38 + (NSString *)filterHTMLTag:(NSString *)str {
39     //替换字符
40     str  =  [str  stringByReplacingOccurrencesOfString:@"&mdash;" withString:@"-"];
41     str  =  [str  stringByReplacingOccurrencesOfString:@"&ldquo;" withString:@"\""];
42     str  =  [str  stringByReplacingOccurrencesOfString:@"&rdquo;" withString:@"\""];
43     str  =  [str  stringByReplacingOccurrencesOfString:@"&nbsp;" withString:@" "];
44     str  =  [str  stringByReplacingOccurrencesOfString:@"&rsquo;" withString:@"’"];
45     str  =  [str  stringByReplacingOccurrencesOfString:@"&lsquo;" withString:@"‘"];
46     str  =  [str  stringByReplacingOccurrencesOfString:@"&middot;" withString:@"·"];
47     str  =  [str  stringByReplacingOccurrencesOfString:@"&quot;" withString:@"\""];
48     str  =  [str  stringByReplacingOccurrencesOfString:@"&amp;" withString:@"&"];
49     str  =  [str  stringByReplacingOccurrencesOfString:@"<strong>" withString:@""];
50     str  =  [str  stringByReplacingOccurrencesOfString:@"</strong>" withString:@""];
51     str  =  [str  stringByReplacingOccurrencesOfString:@"\n" withString:@" "];
52     return str;
53
54 }
55 @end