在Swift 3中使用带有竖线分隔符的regex来过滤匹配项

import Foundation

let inputString = "Hello | World | Swift"
let pattern = "\\b(Hello|Swift)\\b"

do {
    let regex = try NSRegularExpression(pattern: pattern, options: [])
    let matches = regex.matches(in: inputString, options: [], range: NSRange(location: 0, length: inputString.utf16.count))

    for match in matches {
        let matchRange = match.range
        if let range = Range(matchRange, in: inputString) {
            let matchedString = inputString[range]
            print(matchedString)
        }
    }
} catch {
    print("Invalid regex pattern: \(error.localizedDescription)")
}