-(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;
}