我使用 NSRegularExpression 在 HTML 中查找包含 40 个字符的 ID 的出现
这是我的代码:
- (NSString *)stripOutHttp:(NSString *)string {
NSLog(@"the page content :: %@", string);
// Setup an NSError object to catch any failures
NSError *error = NULL;
// create the NSRegularExpression object and initialize it with a pattern
// the pattern will match any http or https url, with option case insensitive
//search for:: <input type="hidden" name="XID" value="f3f3fbafe552358d9312d1fe30670add09adc36c" />
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"<input type=\"hidden\" name=\"XID\" value\"?" options:NSRegularExpressionCaseInsensitive error:&error]; // ultimo funcional
// try /\b([a-f0-9]{40})\b/
// create an NSRange object using our regex object for the first match in the string
NSRange rangeOfFirstMatch = [regex rangeOfFirstMatchInString:string options:0 range:NSMakeRange(0, [string length])];
// check that our NSRange object is not equal to range of NSNotFound
if (!NSEqualRanges(rangeOfFirstMatch, NSMakeRange(NSNotFound, 0))) {
// Since we know that we found a match, get the substring from the parent string by using our NSRange object
NSString *substringForFirstMatch = [string substringWithRange:rangeOfFirstMatch];
NSLog(@"Extracted data : %@",substringForFirstMatch);
// return the matching string
return substringForFirstMatch;
}
return NULL;
}
所以用我目前的正则表达式:
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"<input type=\"hidden\" name=\"XID\" value\"?" options:NSRegularExpressionCaseInsensitive error:&error]; // ultimo funcional
我得到了我需要的一部分:
Extracted data : <input type="hidden" name="XID" value
现在如何获得任何 40 个字符值的响应?
我试过了
// try /\b([a-f0-9]{40})\b/
不过好像还没看懂怎么用
这是我之后的回应::
<input type="hidden" name="XID" value="f3f3fbafe552358d9312d1fe30670add09adc36c" />
多谢