import Foundation
let pattern = #"\d{3}(?!.*?-)[\s\S]*?Download[\s\S]*?(?=\d)"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
1
00:00:39,243 --> 00:00:45,820
This line is ok
2
00:00:46,243 --> 00:00:51,820
This line with
"Ads" word should be deleted
and its next line
3
00:01:04,243 --> 00:01:05,820
This line with
"Download" word should be deleted
and its next line
4
00:01:08,664 --> 00:01:12,331
An ok 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