NSRegularExpression，选择字符串的一部分
给定这样的字符串：
Seat 2: Pet21 ($1.98 in chips)
在 php 中，您可以使用正则表达式中的括号选择正则表达式的一部分，如下所示：
Seat ([0-9]+): (.{1,12}) .[$|€|£]([0-9]+\.?[0-9]{0,2}) in chips.
这选择座位号、用户 ID 和筹码数量：
Array
(
[0] => Array
(
[0] => Seat 1: S@pphiR ($0.83 in chips)
[1] => Seat 2: Pet21 ($1.98 in chips)
[2] => Seat 3: derphurp ($2.76 in chips)
[3] => Seat 4: -M-A-R-K-qaz ($0.92 in chips)
[4] => Seat 5: Rolle55 ($2.45 in chips)
[5] => Seat 6: SanderDecler ($2 in chips)
)
[1] => Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
)
[2] => Array
(
[0] => S@pphiR
[1] => Pet21
[2] => derphurp
[3] => -M-A-R-K-qaz
[4] => Rolle55
[5] => SanderDecler
)
[3] => Array
(
[0] => 0.83
[1] => 1.98
[2] => 2.76
[3] => 0.92
[4] => 2.45
[5] => 2
)
)
有没有办法在 Objective- 中执行类似操作c 与 NSRegularExpression
编辑：到目前为止我已经得到了这个：
NSRegularExpression *regex =
[NSRegularExpression regularExpressionWithPattern:@"Seat [0-9]+: (.{1,12}) .[$|€|£][0-9]+\.?[0-9]{0,2} in chips."
options:0
error:nil];
for (NSTextCheckingResult *result in [regex matchesInString:history options:NSMatchingReportCompletion range:NSMakeRange(0, history.length)])
{
}
Given a string like this:
Seat 2: Pet21 ($1.98 in chips)
In php you can select a part of a regex using parentheses in your regex, like this:
Seat ([0-9]+): (.{1,12}) .[$|€|£]([0-9]+\.?[0-9]{0,2}) in chips.
This selects the seat number, user id and the amount of chips:
Array
(
[0] => Array
(
[0] => Seat 1: S@pphiR ($0.83 in chips)
[1] => Seat 2: Pet21 ($1.98 in chips)
[2] => Seat 3: derphurp ($2.76 in chips)
[3] => Seat 4: -M-A-R-K-qaz ($0.92 in chips)
[4] => Seat 5: Rolle55 ($2.45 in chips)
[5] => Seat 6: SanderDecler ($2 in chips)
)
[1] => Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
)
[2] => Array
(
[0] => S@pphiR
[1] => Pet21
[2] => derphurp
[3] => -M-A-R-K-qaz
[4] => Rolle55
[5] => SanderDecler
)
[3] => Array
(
[0] => 0.83
[1] => 1.98
[2] => 2.76
[3] => 0.92
[4] => 2.45
[5] => 2
)
)
Is there a way to do the similar in objective-c with NSRegularExpression
edit: So far I've got this:
NSRegularExpression *regex =
[NSRegularExpression regularExpressionWithPattern:@"Seat [0-9]+: (.{1,12}) .[$|€|£][0-9]+\.?[0-9]{0,2} in chips."
options:0
error:nil];
for (NSTextCheckingResult *result in [regex matchesInString:history options:NSMatchingReportCompletion range:NSMakeRange(0, history.length)])
{
}
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您可能想要使用
NSRegularExpression的firstMatchInString:options:range:方法，该方法返回一个NSTextCheckingResult。然后你想使用NSTextCheckingResult的rangeAtIndex:方法来获取每个子匹配的范围。您可以将范围传递给原始NSString的substringWithRange:方法来获取子匹配的文本。You probably want to use the
firstMatchInString:options:range:method ofNSRegularExpression, which returns anNSTextCheckingResult. Then you want to use therangeAtIndex:method ofNSTextCheckingResultto get the range of each submatch. You can pass a range to thesubstringWithRange:method of the originalNSStringto get the text of a submatch.