oc 正则图片<img /> 标签

-(NSString *)getImageAttributeValue:(NSString *)content attributeKey:(NSString *)key {

NSString *regexString = [NSString stringWithFormat:@"%@=\\\"(.*?)\\\"", key];

NSRange range = [content rangeOfString:regexString options:NSRegularExpressionSearch];

if (range.location != NSNotFound) {

return [[content substringWithRange:range] componentsSeparatedByString:@"\""][1];

} else {

return nil;

}

}

-(NSString *)filterFormularCodeTag:(NSMutableString *)htmlString

{

NSString *content = htmlString;

NSString *regexString = [NSString stringWithFormat:@"<img(.*?)code=(.*?)[^>]*?>"];

NSError *error = nil;

NSRegularExpression *regular = [NSRegularExpression regularExpressionWithPattern:regexString options:NSRegularExpressionCaseInsensitive error:&error];

NSArray *resultArray = [regular matchesInString:htmlString options:0 range:NSMakeRange(0, [htmlString length])];

for (NSTextCheckingResult *result in resultArray)

{

NSString *subString = [htmlString substringWithRange:result.range];

NSString *codeContent = [self getImageAttributeValue:subString attributeKey:@"code"];

content = [content stringByReplacingOccurrencesOfString:subString withString:codeContent];

}

return content;

}