5

我在解析器中使用正则表达式,但是,它似乎给出了一个结果,这是我的代码:正则表达式:

self.seatSelectRegex = [NSRegularExpression regularExpressionWithPattern:@"Seat ([0-9]{1,2}): (.*) \\([$£€]?([0-9.]+) in chips\\).*$" options:NSRegularExpressionAnchorsMatchLines error:&error];

代码:

NSMutableDictionary *players = [[NSMutableDictionary alloc] init];
[self.seatSelectRegex enumerateMatchesInString:input options:NSMatchingCompleted range:NSMakeRange(0, input.length) usingBlock:
 ^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) 
{

    NSLog(@"%lu", result.range.length);
    Player *p = [[Player alloc] init];

    p.name = [input substringWithRange:[result rangeAtIndex:2]];
    p.seatNumber = [input substringWithRange:[result rangeAtIndex:1]].intValue;
    p.stack = [input substringWithRange:[result rangeAtIndex:3]].doubleValue;

    [players setValue:p forKey:p.name];
}];

我期望我的输入有 3 个结果,但是,我得到 4,其中最后一个结果的范围是 location = 0 和 length = 0(前三个都是正确的)。这是常见的行为,我应该只检查范围的位置和长度,还是某处有错误?

对于它的价值,这是我的输入:

PokerStars Hand #81669312371:  Hold'em No Limit ($0.01/$0.02 USD) - 2012/06/08 16:57:33 CET [2012/06/08 10:57:33 ET]
Table 'Icarus III' 6-max Seat #2 is the button
Seat 2: SanderDecler ($2 in chips) 
Seat 3: ehrli87 ($0.90 in chips) 
Seat 4: umar.11 ($1.60 in chips) 
ehrli87: posts small blind $0.01
umar.11: posts big blind $0.02
*** HOLE CARDS ***
Dealt to SanderDecler [Kh 7d]
SanderDecler: raises $0.04 to $0.06
ehrli87: folds 
umar.11: calls $0.04
*** FLOP *** [Jc Tc Jh]
umar.11: checks 
SanderDecler: bets $0.08
umar.11: raises $0.24 to $0.32
SanderDecler: folds 
Uncalled bet ($0.24) returned to umar.11
umar.11 collected $0.28 from pot
*** SUMMARY ***
Total pot $0.29 | Rake $0.01 
Board [Jc Tc Jh]
Seat 2: SanderDecler (button) folded on the Flop
Seat 3: ehrli87 (small blind) folded before Flop
Seat 4: umar.11 (big blind) collected ($0.28)
4

1 回答 1

8

这是因为您将NSMatchingReportCompletion选项与enumerateMatchesInString:options:range:usingBlock:. 从苹果文档

如果指定了 NSMatchingReportCompletion 匹配选项,则在匹配完成后将调用 Block 对象一次,结果为零,并且在传递给 Block 的标志中设置 NSMatchingCompleted 匹配标志,以及 NSMatchingHitEnd、NSMatchingRequiredEnd 中的任何其他相关“NSMatchingFlags” ,或 NSmatchingInternalError。

您将最后一个块调用视为位置和长度设置为 0 的范围的原因是因为您发送的消息nil将返回nil(即整数 0)。

于 2012-06-09T15:07:27.907 回答