import Foundation
let pattern = #"(?<!^\h)(?<!^\h\h)(?<!^\h\h\h)(?<!\h\h\h\h)\b(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\b"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
1.blah
1.1 blah blah
1.1.1 blah blah blah my ip address is 192.168.1.1
1.1.1.1 blah blah blah blah (DLP thinks this is an IP Address and block the document)
On the 1. January the profit rate was 3.5 %, and by article 3.1.4. in the agreement we sent that information to 127.0.0.1
"""#
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