Swift 正则匹配 [英] Swift Regex Matching

问题描述

模式不是问题

我有一个正则表达式

var elementRegex = "([A-Z][a-z]?)(\\d*)?"

我想将其与文本匹配.示例将它与 Al3Br3 匹配，我希望结果是

I want to match that to text. Example would be matching it to Al3Br3, where I would expect the result to be

Al,3 和 Br,3

我该怎么做?

推荐答案

这不是一个 Swift 特定的问题，而是一个 Cocoa 问题.您没有指定是为 OS X 还是 iOS 开发，但两者都通过 NSRegularExpression 和 NSString 提供出色的正则表达式支持.

This is not a Swift specific question but more a Cocoa question. You don't specify wether you are developing for OS X or iOS but both have excellent regular expression support via NSRegularExpression and NSString.

以下是它们在 Swift 中的用法示例:

Here is and example of their usage in Swift:

let s: NSString = "Al3Br3"
if let r = NSRegularExpression(pattern: "([A-Z][a-z]?)(\\d*)?", options: NSRegularExpressionOptions.allZeros, error: nil) {
    for match in r.matchesInString(s, options: NSMatchingOptions.allZeros, range: NSMakeRange(0, s.length)) as [NSTextCheckingResult] {
        println("Match:")
        for i in 0..<match.numberOfRanges {
            println("\(i): \(s.substringWithRange(match.rangeAtIndex(i)))")
        }
    }
}

这导致:

Match:
0: Al3
1: Al
2: 3
Match:
0: Br3
1: Br
2: 3

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