import Foundation
let pattern = #"^(?:-\w+-)*linear-gradient\((?:.*?(?<=top|bottom|left|right|deg)\s*,\s*)*"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = ##"""
-webkit-linear-gradient(top , rgb(243, 231, 231), rgba(12, 0, 0, 0.48));
-moz-linear-gradient(90deg , hsl(0, 80%, 70%), #bada55)
-o-linear-gradient(bottom, hsl(0, 80%, 70%), #bada55) ;
linear-gradient(135deg , red, red 60%, blue) ;
linear-gradient(yellow, blue 20%, #0f0);
linear-gradient( to left top, blue, green 40%, red );
linear-gradient(to top left , red, orange, yellow, green, blue, indigo, violet) ;
linear-gradient(to bottom right , red, rgba(255, 0, 0, 0));
linear-gradient(right top to left bottom, red, rgb(255, 0, 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