import Foundation
let pattern = #"(?:line(\d+)\R)?(\d{2}(?::\d{2}){2}\.\d{2,3})\s*-->\s*(\d{2}(?::\d{2}){2}\.\d{2,3})\R((?:[^\r\n]|\r?\n[^\r\n])*)(?:\r?\n\r?\n|$)"#
let regex = try! NSRegularExpression(pattern: pattern, options: .caseInsensitive)
let testString = #"""
WEBVTT FILE
line1
00:00:00.000 --> 00:00:10.000
‘Stuff’
line2
00:00:10.000 --> 00:00:20.000
Other stuff
Example with 2 lines
line3
00:00:20.00 --> 00:00:30.000
Example with only 2 digits in milliseconds
line4
00:00:30.000 --> 00:00:40.000
Different stuff
00:00:40.000 --> 00:00:50.000
Example without a head line
"""#
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