ppth0608

import UIKit

protocol Paper {}

class APaper: Paper {

    var a: String
    var text: String

    init(a: String, text: String) {

ppth0608

func collectionViewSize(flowLayout: UICollectionViewFlowLayout, numberOfItemsInRow count: Int) -> CGSize {
    let itemSpacing = flowLayout.minimumInteritemSpacing
    let leftInset = flowLayout.sectionInset.left
    let rightInset = flowLayout.sectionInset.right
    let size = (collectionView.bounds.width - (leftInset + rightInset) - (itemSpacing * CGFloat(count - 1))) / CGFloat(count)
    return CGSize(width: size, height: size)
}

ppth0608

import UIKit

protocol Reusable { }

extension UITableViewCell: Reusable { }
extension UICollectionViewCell: Reusable { }

extension UITableView {
    
    func register<T: Reusable>(_ type: T.Type) {

ppth0608

import Foundation
import CommonCrypto

//Reference : https://stackoverflow.com/questions/55356220/get-string-md5-in-swift-5
extension String {

    var md5: String {
        let data = Data(self.utf8)
        let hash = data.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) -> [UInt8] in
            var hash = [UInt8](repeating: 0, count: Int(CC_MD5_DIGEST_LENGTH))

ppth0608

import UIKit

extension UIViewController {
    
    class var rootTabBarController: TabBarController? {
        guard let keyWindow = UIApplication.shared.keyWindow else { return nil }
        return keyWindow.rootViewController as? TabBarController
    }
    
    class var topMost: UIViewController? {

ppth0608

import UIKit

extension UIPanGestureRecognizer {
    
    enum Direction: String {
        case up
        case down
        case left
        case right
        

ppth0608

import UIKit

public class ISImageView: UIImageView {
    
    @IBInspectable public var isInteractable: Bool = false {
        didSet {
            guard oldValue != isInteractable else { return }
            if isInteractable {
                setupGesture()
                cellForTarget(superview: superview)?.clipsToBounds = false

ppth0608

protocol URLSchemeConvertible {
    var url: URL? { get }
    var urlString: String { get }
}

extension URLSchemeConvertible {
    var queryItems: [URLQueryItem]? {
        return URLComponents(string: urlString)?.queryItems
    }

ppth0608

extension ObservableType {

    func postNotification(_ name: Notification.Name) -> Observable<E> {
        return self.do(onNext: { element in
            NotificationCenter.default.post(name: name, object: element)
        })
    }
}

/////////

ppth0608

import RxSwift
import UIKit

extension UIAlertController {

    struct AlertAction {
        var title: String?
        var style: UIAlertAction.Style

        static func action(title: String?, style: UIAlertAction.Style = .default) -> AlertAction {