A validator for postal codes with support for 200+ regions.

import Foundation
import PostalCodeValidator

if let validator = PostalCodeValidator(locale: .current) { // United States (US)
    validator.validate(postalCode: "95014") // true
    validator.validate(postalCode: "22162-1010") // true

    validator.validate(postalCode: "1234567") // false
    validator.validate(postalCode: "INVALID") // false
}

// 248 regions supported
if let validator = PostalCodeValidator(regionCode: "JP") { // Japan (JP)
    validator.validate(postalCode: "154-0023") // true
    validator.validate(postalCode: "12345") // false
}

Note: Only the region of a locale is used to determine validation rules. To validate the postal code for a particular region, you can construct a locale using an identifier with the "und" language code.

• Swift 4.0+

Add the PostalCodeValidator package to your target dependencies in Package.swift:

import PackageDescription

let package = Package(
  name: "YourProject",
  dependencies: [
    .package(
        url: "https://github.com/FormatterKit/PostalCodeValidator",
        from: "0.1.0"
    ),
  ]
)

Then run the swift build command to build your project.

• Armed forces in Germany (and likely other countries) use special postal codes, which aren't included in the upstream data source. This will cause validation of these postal codes to fail. (Thanks for pointing this out, @timohetzel)

The CLDR previously maintained a list of postal code formats, but that information was deprecated in v27.

Following the guidance of the twitter-cldr-rb project, PostalCodeValidator sources its information from http://i18napis.appspot.com. The most recent release of this software uses information retrieved from the website on November 27, 2019.

MIT

Mattt (@mattt)