import Foundation
let pattern = #"(20\d{2})-(0[1-9]|1[0-2])-([01][\d]|3[01])[\sT]([01]\d|2[0-3]):([0-5]\d):([0-5]\d)(Z|[\+-](0[\d]|1[\d]|2[0-3]):([0-5]\d))?"#
let regex = try! NSRegularExpression(pattern: pattern)
let testString = #"""
2023-01-01 00:00:00Z
2023-12-31 23:59:59+00:00
2023-06-06 13:47:23-06:00
2023-06-06T13:47:23+23:45
2023-06-06T13:47:23
"""#
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