KrauserHuang

    func checkPassword() {
        if typePassword == correctPassword {
            let controller = UIAlertController(title: "Correct", message: "Welcome back!", preferredStyle: .alert)
            let action = UIAlertAction(title: "OK", style: .default) { (_) in
                self.reset()
            }
            controller.addAction(action)
            present(controller, animated: true, completion: nil)
        } else {
            let controller = UIAlertController(title: "Wrong", message: "Please try again!", preferredStyle: .alert)

KrauserHuang

    func checkAnswer() {
        if typeTextField.text == String(questionNumber) {
            let controller = UIAlertController(title: "答對了", message: "正確答案是\(questionNumber)", preferredStyle: .alert)
            let action = UIAlertAction(title: "Re-Play", style: .default) { (_) in
                self.playAgain()
            }
            controller.addAction(action)
            present(controller, animated: true, completion: nil)
        } else if typeTextField.text! > String(questionNumber) {
            if typeTextField.text! >= String(upperBound) {

KrauserHuang

    @IBAction func go(_ sender: UIButton) {
        if typeTextField.text == "" {
            let controller = UIAlertController(title: "請給我一個數字", message: "輸入數字才可以繼續喔！", preferredStyle: .alert)
            let action = UIAlertAction(title: "了解", style: .default, handler: nil)
            controller.addAction(action)
            present(controller, animated: true, completion: nil)
        } else if chanceNumber > 1 {
            checkAnswer()
        } else {
            let controller = UIAlertController(title: "遊戲結束", message: "正確答案是\(questionNumber)", preferredStyle: .alert)

KrauserHuang

import UIKit

class RandomImageViewController: UIViewController {

    @IBOutlet weak var imageView: UIImageView!
    @IBOutlet weak var segmentControl: UISegmentedControl!
    
    var urlStr = ""
    
    override func viewDidLoad() {

KrauserHuang

import UIKit

class CustomeImageViewController: UIViewController {

    @IBOutlet weak var imageView: UIImageView!
    
    var urlStr = ""
    
    override func viewDidLoad() {
        super.viewDidLoad()

KrauserHuang

func fetchUserData() {
        let urlStr = "https://randomuser.me/api/"
        if let url = URL(string: urlStr) {
            URLSession.shared.dataTask(with: url) { (data, response, error) in
                if let data = data,
                   let content = String(data: data, encoding: .utf8) {
                    print(content)
                    let decoder = JSONDecoder()
                    do {
                        let result = try decoder.decode(UserData.self, from: data)

KrauserHuang

        fullScreenSize = UIScreen.main.bounds.size
        view.backgroundColor = .white
        // 建立UICollectionViewFloatLayout
        let layout = UICollectionViewFlowLayout()
        layout.sectionInset = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
        // 設定cell上下間距
        layout.minimumLineSpacing = 5
        // 設定cell尺寸
        layout.itemSize = CGSize(width: fullScreenSize.width / 3 - 10, height: fullScreenSize.width / 3 - 10)
        // 設定header/footer大小

KrauserHuang

        // 建立UICollectionView
        let myCollectionView = UICollectionView(frame: CGRect(x: 0, y: 20, width: fullScreenSize.width, height: fullScreenSize.height - 20), collectionViewLayout: layout)
        // 註冊cell來重複利用
        myCollectionView.register(MyCollectionViewCell.self, forCellWithReuseIdentifier: "Cell")
        // 註冊section的header/footer來重複使用
        myCollectionView.register(UICollectionReusableView.self, forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader, withReuseIdentifier: "Header")
        myCollectionView.register(UICollectionReusableView.self, forSupplementaryViewOfKind: UICollectionView.elementKindSectionFooter, withReuseIdentifier: "Footer")
        // 設置委任對象
        myCollectionView.delegate = self
        myCollectionView.dataSource = self

KrauserHuang

    // 每一組collectionView有幾個cell
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 7
    }
    // 每個cell要顯示的內容
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! MyCollectionViewCell
        cell.imageView.image = UIImage(named: "photo\(indexPath.item)")
        cell.titleLabel.text = "\(indexPath.item)"
        return cell

KrauserHuang

// 點選cell後的動作
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        print("你選擇了第\(indexPath.section)組的")
        print("第\(indexPath.item)張圖片")
    }