mikru1688

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?
    var pageA: PageA?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        window = UIWindow(frame: UIScreen.main.bounds)
        pageA = PageA()
        let nav: UINavigationController = UINavigationController(rootViewController: pageA!)

mikru1688

    override func viewDidLoad() {
        super.viewDidLoad()
        self.navigationItem.title = "PageA"
        self.view.backgroundColor = UIColor.white
        
        // 生成切換至PageB的按鈕
        let switchBtn: UIButton = UIButton()
        switchBtn.frame = CGRect(x: self.view.frame.size.width / 2 - 100, y: self.view.frame.size.height / 2 - 25, width: 200, height: 50)
        switchBtn.titleLabel?.font = UIFont.systemFont(ofSize: 30)
        switchBtn.setTitle("切換至PageB", for: .normal)

mikru1688

class PageB: UIViewController, UITableViewDelegate, UITableViewDataSource {
    
    var delegate: PageBDelegate! // delegate
    var testDataTV: UITableView!
    var dataList: [String] = ["Apple", "Banana", "Cherry"] // 畫面上顯示的資料
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.navigationItem.title = "PageB"
        

mikru1688

    // 切換至PageB
    func onClickToPageB(_ sender: UIButton) {
        let pageB: PageB = PageB()
        pageB.delegate = self // 由我(PageA)來代理你(PageB)
        self.navigationController?.pushViewController(pageB, animated: true)
    }

mikru1688

enum Shape {
    case rectangle
    case circle
    case other
}

mikru1688

enum Shape: Int {
    case rectangle = 1
    case circle = 2
    case other = 3
}

mikru1688

enum Shape {
    case rectangle(Int)
    case circle(Int, Int)
    case other
}

mikru1688

enum Shape: Int {
    case rectangle = 1
    case circle = 2
    case other = 3
}

func chooseShape(shape: Shape) {
    switch shape {
    case .rectangle:
        print("長方形...")

mikru1688

enum Shape {
    case rectangle(Int, Int)
    case circle(Double)
    case other
}

func chooseShape(shape: Shape) {
    switch shape {
    case .rectangle(let width, let height):
        print("長方形的面積為: \(width * height)")

mikru1688

enum Shape: Int {
    case rectangle = 1
    case circle = 2
    case other = 3
}

func chooseShape(shape: Shape) {
    switch shape {
    case .rectangle:
        print("長方形")