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正则表达式的字符匹配顺序

[英]Regex matching sequence of characters

原文 2017-08-02 00:29:59 6 1 objective-c/ regex/ nsstring/ nsregularexpression

I have a test string such as: The Sun and the Moon together, forever 我有一个测试字符串，例如： The Sun and the Moon together, forever

I want to be able to type a few characters or words and be able to match this string if the characters appear in the correct sequence together, even if there are missing words. 我希望能够键入一些字符或单词，并且即使这些字符缺少单词，如果这些字符以正确的顺序一起出现，也能够匹配该字符串。 For example, the following search word(s) should all match against this string: 例如，以下搜索词都应与此字符串匹配：

The Moon Sun tog Tsmoon The get ever The Moon Sun tog Tsmoon The get ever

What regex pattern should I be using for this? 我应该为此使用哪种正则表达式模式？ I should add that the supplied test strings are going to be dynamic within an app, and so I'd like to be able to use a pattern based on the search string. 我应该补充说，提供的测试字符串将在应用程序内是动态的，因此我希望能够使用基于搜索字符串的模式。

1 个解决方案

From your example Tsmoon you show partial words ( T ), ignoring case ( s , m ) and allow anything between each entered character. 在示例Tsmoon您将显示部分单词（ T ），忽略大小写（ s ， m ），并在每个输入的字符之间允许任何内容。 So as a first attempt you can: 因此，您可以尝试以下操作：

Set the ignore case option 设置忽略大小写选项
Between each chapter input insert the regular expression to match zero or more of anything. 在每个章节输入之间插入正则表达式以匹配零个或多个。 You can choose whether to match the shortest or longest run. 您可以选择匹配最短或最长的运行时间。

Try that, reading the documentation for NSRegularExpression if you're stuck, and see how it goes. 尝试一下，如果遇到问题，请阅读NSRegularExpression的文档，并查看其进展。 If you get stuck ask a new question showing your code and the RE constructed and explain what happens/doesn't work as expected. 如果您陷入困境，请提出一个新问题，以显示您的代码和可重构的RE，并说明会发生什么/不起作用。

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