Swift Language NSRegularExpression in Swift Validation
Example
Regular expressions can be used to validate inputs by counting the number of matches.
var validDate = false
let numbers = "35/12/2016"
let usPattern = "^(0[1-9]|1[012])[-/.](0[1-9]|[12][0-9]|3[01])[-/.](19|20)\\d\\d$"
let ukPattern = "^(0[1-9]|[12][0-9]|3[01])[-/](0[1-9]|1[012])[-/](19|20)\\d\\d$"
do {
let regEx = try NSRegularExpression(pattern: ukPattern, options: [])
let nsString = numbers as NSString
let matches = regEx.matches(in: numbers, options: [], range: NSMakeRange(0, nsString.length))
if matches.count > 0 {
validDate = true
}
validDate
} catch let error as NSError {
print("Matching failed")
}
//output = false
