import Foundation
let pattern = #"^(.*\/thumb\/[0-9a-f]\/[0-9a-f]{2})\/([^\/]+\.(jpg|jpeg|png|gif))\/\d+px-(\2)"#
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .caseInsensitive])
let testString = #"""
https://upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Royal_tyrrell_entrance.JPG/800px-Royal_tyrrell_entrance.JPG
https://upload.wikimedia.org/wikipedia/commons/6/6d/Royal_tyrrell_entrance.JPG
https://upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Royal_tyrrell_entrance.jpg/800px-Royal_tyrrell_entrance.jpg
https://upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Royal1000tyrrell_entrance.jpeg/800px-Royal1000tyrrell_entrance.jpeg
https://upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Royal_tyrrell_entrance.png/800px-Royal_tyrrell_entrance.png
https://upload.wikimedia.org/wikipedia/commons/thumb/6/6d/Royal_tyrrell_entrance.gif/800px-Royal_tyrrell_entrance.gif
//upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Flag_of_Canada.svg/30px-Flag_of_Canada.svg.png 1.5x
//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Royal_Tyrrell_Museum.JPG/220px-Royal_Tyrrell_Museum.JPG
//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Royal_Tyrrell_Museum.JPG/330px-Royal_Tyrrell_Museum.JPG 1.5x
//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Royal_Tyrrell_Museum.JPG/440px-Royal_Tyrrell_Museum.JPG 2x
//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png"
//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x
//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x
//upload.wikimedia.org/wikipedia/commons/thumb/9/91/Joseph_Burr_Tyrrell_bust.jpg/220px-Joseph_Burr_Tyrrell_bust.jpg
//upload.wikimedia.org/wikipedia/commons/thumb/9/91/Joseph_Burr_Tyrrell_bust.jpg/330px-Joseph_Burr_Tyrrell_bust.jpg 1.5x,
//upload.wikimedia.org/wikipedia/commons/thumb/9/91/Joseph_Burr_Tyrrell_bust.jpg/440px-Joseph_Burr_Tyrrell_bust.jpg 2x
"""#
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