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Email & Phone Validation in Swift
To validate email and phone in swift language we can use multiple conditional statements like if conditions, but that’s a long process and may contain 50-100s of if statements to validate email.
So instead of conditionals we’ll use Regular expression. Swift provides NSPredicates which we can use to evaluate a regular expression and test them.
Let’s see how we can use regular expressions to do the same.
We’ll create a function which we can use as extension of String class or UIViewController to use through out the project.
Add the following code to any class in your Project, or create a separate swift class to add extension.
extension String {
var isValidEmail: Bool {
let regularExpressionForEmail = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,64}"
let testEmail = NSPredicate(format:"SELF MATCHES %@", regularExpressionForEmail)
return testEmail.evaluate(with: self)
}
var isValidPhone: Bool {
let regularExpressionForPhone = "^\d{3}-\d{3}-\d{4}$"
let testPhone = NSPredicate(format:"SELF MATCHES %@", regularExpressionForPhone)
return testPhone.evaluate(with: self)
}
}The same can be used like
override func viewDidLoad() {
super.viewDidLoad()
print("11f".isValidEmail)
print("abc@xuyz.com".isValidEmail)
print("8892".isValidPhone)
print("998-877-2211".isValidPhone)
}When we run the above code, we get the following output.
false true false true
Updated on: 30-Jul-2019
1K+ Views
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