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    func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
        if text == "\n" {
            let nsString = textView.text as NSString?
            let newString = nsString?.replacingCharacters(in: range,
                                                          with: "\n• ")
            textView.text = newString
            
            textView.sizeToFit()
            tableView.beginUpdates()
            tableView.endUpdates()

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 func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {

     guard textField == self.exportAmountTextField else { return true }

     let oldString: NSString = (textField.text ?? "") as NSString
     let resultString = oldString.replacingCharacters(in: range, with: string)

     let doubleString = Double(resultString) ?? 0

     if (string.trimmingCharacters(in: CharacterSet.decimalDigits).count == 0 || string == "" || string == ".") == false {

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How to Create a Popover on iPhone

Storyboard set up

Add your view controllers in storyboard. In the Size Inspector, change the simulated size of the popover view controller to "Freeform". This doesn't change the popover's size when you run the app, but it does make it easier to lay out subviews correctly.

When adding the segue between view controllers, select "Present as Popover".

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    // TextField
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        guard let textFieldText = textField.text,
              let rangeOfTextToReplace = Range(range, in: textFieldText) else {
                  return false
              }
        let substringToReplace = textFieldText[rangeOfTextToReplace]
        let count = textFieldText.count - substringToReplace.count + string.count
        
        return count <= 10

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//
//  Bundle-AppLocale.swift
//  Radiant Tap Essentials
//
//  Copyright © 2016 Aleksandar Vacić, Radiant Tap
//  MIT License · http://choosealicense.com/licenses/mit/
//

import Foundation
import Lokalise

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let maxInt = 9
let randomFrom0ToMaxInt = arc4random_uniform(maxInt)

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protocol TransparentNavProtocol {
    func setTransparentNav()
    func resetTransparentNav()
}

extension TransparentNavProtocol where Self: UIViewController {
    func setTransparentNav() {
        self.navigationController?.navigationBar.subviews[0].alpha = 0
        self.navigationController?.navigationBar.tintColor = UIColor.white
        self.navigationController?.navigationBar.isTranslucent = true

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import UIKit

protocol RedBackNavProtocol {
    func setRedNavBar()
}

extension RedBackNavProtocol where Self : UIViewController {
    func setRedNavBar() {
        self.navigationController?.navigationBar.barTintColor = UIColor.navigation_bar_red
        self.navigationController?.navigationBar.tintColor = UIColor.white

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import UIKit

protocol RedBackNavProtocol {
    func setRedNavBar()
}

extension RedBackNavProtocol where Self : UIViewController {
    func setRedNavBar() {
        self.navigationController?.navigationBar.barTintColor = UIColor.navigation_bar_red
        self.navigationController?.navigationBar.tintColor = UIColor.white

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yourTextField.valueForKey("textInputTraits")?.setValue(UIColor.clearColor(), forKey: "insertionPointColor")