import Foundation
let pattern = #"EXT-ID\[(?<ext_id>[^\]]+)\]\s+FLD\[(?<fld>[^\]]+)\]\s+FRMT\[(?<frmt>[^\]]+)\]\s+LL\[(?<ll>[^\]]+)\]\s+LEN\[(?<len>[^\]]+)\]\s+DATA\[(?<data>[^\]]+)\]"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
+EXT-ID[3.1] FLD[Transaction Type] FRMT[FIXED] LL[0] LEN[2] DATA[26]
+EXT-ID[3.2] FLD[From Account Type] FRMT[FIXED] LL[0] LEN[2] DATA[00]
+EXT-ID[3.3] FLD[To Account Type] FRMT[FIXED] LL[0] LEN[2] DATA[00]
EXT-ID[19] FLD[Acquiring Institution ..] FRMT[FIXED] LL[0] LEN[3] DATA[702]
EXT-ID[43] FLD[Card Acceptor Name or ..] FRMT[FIXED-Group] LL[0] LEN[40] DATA[PAYPAL*GORTON STEPHANIE KSydney AU]
+EXT-ID[43.1] FLD[43-1 ATM Location] FRMT[FIXED] LL[0] LEN[25] DATA[PAYPAL*GORTON STEPHANIE K]
+EXT-ID[43.2] FLD[43-2 City Name] FRMT[FIXED] LL[0] LEN[13] DATA[Sydney ]
+EXT-ID[43.3] FLD[43-3 Country Code] FRMT[FIXED] LL[0] LEN[2] DATA[SG]
EXT-ID[48] FLD[Additional Data, Priva..] FRMT[LVAR-Bin] LL[1] LEN[11] DATA[OCT 0901]
EXT-ID[49] FLD[Currency Code, Transac..] FRMT[FIXED] LL[0] LEN[3] DATA[840]
"""#
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