Split String by Index Swift 4

This time I share code in swift 4 how to split your string into an index and use that in textField, try this code below maybe can help you.

	// NumberBeforeStringVC.swift
	// For Test Part 4
	//
	// Created by Jeri PM on 05/10/18.
	// Copyright © 2018 Jeri PM. All rights reserved.
	//
	class NumberStringVC: UIViewController {
	@IBOutlet weak var texField: UITextField!
	@IBOutlet weak var texField1: UITextField!
	var noPolisi = "8923ZE"
	override func viewDidLoad() {
	super.viewDidLoad()
	let strint = noPolisi.group(of: 4)
	print("\(strint[0]) Or \(strint[1])")
	self.texField.text = "\(strint[0])"
	self.texField1.text = "\(strint[1])"
	}
	}
	// Group String
	extension String {
	func group(of n: Int) -> [String] {
	let chars = Array(self)
	return stride(from: 0, to: chars.count, by: n).map {
	String(chars[$0..<min($0+n, chars.count)])
	}
	}
	}
	//-----------------------------------------------------------------------
	// or can use this, simple code
	class NumberStringVC: UIViewController {
	@IBOutlet weak var texField: UITextField!
	@IBOutlet weak var texField1: UITextField!
	var noPolisi = "8923_ZE" // use "_" to split by components
	override func viewDidLoad() {
	super.viewDidLoad()
	let strint = noPolisi.components(separatedBy: "_")
	print("\(strint[0]) Or \(strint[1])")
	self.texField.text = "\(strint[0])"
	self.texField1.text = "\(strint[1])"
	}
	}

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