import Foundation
let pattern = #"</h1>\s*(<div>)?(.*?)\s*(</div>)?</header>"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
<header><h1>A Suspenseful Movie Title</h1><div>The narrative traces the journey of three youngsters from a seaside community who inadvertently capture a homicide on camera. As they unwittingly become enmeshed with the perpetrator, it unravels a convoluted case that entangles numerous families, culminating in an unpredictable outcome.</div></header>
<header>
<h1>Movie Title</h1>
A group of extraordinary individuals, each with unconventional occupations, emerged as champions for the common people on the streets by pursuing justice. Suddenly, they gained access to supernatural abilities.
</header>
<header>
<h1>Funny Comedy Movie Title</h1>The following is a comical tale of a husband and wife's pursuit of their ambition to obtain a flat.</header>
"""#
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