import Foundation
let pattern = #"started(.*?(?:stored\s+(\d+)\s+)?)finished"#
let regex = try! NSRegularExpression(pattern: pattern, options: .dotMatchesLineSeparators)
let testString = #"""
started xx xxxxxxx xxxxx xxxxxx xx xxxxxxxxx xxxxxxx xxxx xx
xx xxx xxxxx xxxx xxxxxxxx xxxx xxxxxx found 9999 xxxxx xxxxx
xxx xx xxxx xxxx xxxxxxxxxxx xxxxxxx xxx stored 9999 finished
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let matches = regex.matches(in: testString, range: stringRange)
var result: [[String]] = []
for match in matches {
var groups: [String] = []
for rangeIndex in 1 ..< match.numberOfRanges {
let nsRange = match.range(at: rangeIndex)
guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue }
let string = (testString as NSString).substring(with: nsRange)
groups.append(string)
}
if !groups.isEmpty {
result.append(groups)
}
}
print(result)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression