import Foundation
let pattern = ##"(?:rgb(?:a|)\s*|#)(?:\(|)\s*(25[0-5]|2[0-4][0-9]|1[0-9]?[0-9]?|[1-9][0-9]?|[0-9]|[A-Fa-f0-9]{2}|[A-Fa-f0-9]{2})(?:\,|)\s*(25[0-5]|2[0-4][0-9]|1[0-9]?[0-9]?|[1-9][0-9]?|[0-9]|[A-Fa-f0-9]{2}|[A-Fa-f0-9]{2})(?:\,|)(?:\,|)\s*(25[0-5]|2[0-4][0-9]|1[0-9]?[0-9]?|[1-9][0-9]?|[0-9]|[A-Fa-f0-9]{2}|[A-Fa-f0-9]{2}).+"##
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = ##"""
#3498db
rgb(231, 76, 60)
rgb(155, 89, 182)
rgba(46, 204, 113,1.0)
rgba ( 52, 152, 219,1.0)
"""##
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