在Swift 3中搜索正则表达式

import Foundation

func searchRegex(pattern: String, inString string: String) -> [String] {
    do {
        let regex = try NSRegularExpression(pattern: pattern, options: [])
        let nsString = string as NSString
        let results = regex.matches(in: string, options: [], range: NSRange(location: 0, length: nsString.length))
        
        var matches = [String]()
        for result in results {
            let match = nsString.substring(with: result.range)
            matches.append(match)
        }
        
        return matches
    } catch {
        print("Invalid regex pattern: \(error.localizedDescription)")
        return []
    }
}

let inputString = "Hello, Swift 3!"
let pattern = "[a-zA-Z]+"
let matches = searchRegex(pattern: pattern, inString: inputString)
print(matches) // Output: ["Hello", "Swift"]