Swift Regex Tester & Builder

// Swift 5.7+ Regex Literal
let regex = /[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,64}/

let text = """
Contact us at support@thorous.com or alex.dev@example.org for details.
"""

for match in text.matches(of: regex) {
    print("Matched: \(match.output)")
}

// Foundation NSRegularExpression
let pattern = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let regex = try NSRegularExpression(
    pattern: pattern,
    options: [.caseInsensitive]
)

let nsString = text as NSString
let results = regex.matches(in: text, range: NSRange(location: 0, length: nsString.length))
let matches = results.map { nsString.substring(with: $0.range) }