Aiur3908

import UIKit
import AVFoundation

class ViewController: UIViewController {

    private var player: AVPlayer!
    private var playerLayer: AVPlayerLayer!

    override func viewDidLoad() {
        super.viewDidLoad()

Aiur3908

scrollView.flashScrollIndicators()

Aiur3908

func start() {
    let userInfo = ["name": "Jerry"]
    timer = Timer.scheduledTimer(timeInterval: 1,
                                 target: self,
                                 selector: #selector(update(timer:)),
                                 userInfo: userInfo,
                                 repeats: true)
}

@objc func update(timer: Timer) {

Aiur3908

var timer: Timer?
var timerCount = 0

func start() {
    timer = Timer.scheduledTimer(timeInterval: 1,
                                 target: self,
                                 selector: #selector(update(timer:)),
                                 userInfo: nil,
                                 repeats: true)
}

Aiur3908

func stop() {
    timer?.invalidate()
}

Aiur3908

var timer: Timer?

func start() {
    timer = Timer.scheduledTimer(timeInterval: 1,
                                 target: self,
                                 selector: #selector(update(timer:)),
                                 userInfo: nil,
                                 repeats: true)
}

Aiur3908

func update(timer: Timer) {
    print("更新")
}

Aiur3908

import UIKit
import Kingfisher

class ViewController: UIViewController {
    
    @IBOutlet weak var imageView: UIImageView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        let url = URL(string: "https://i.imgur.com/aMMk5ri.jpg")

Aiur3908

let synthesizer = AVSpeechSynthesizer()
let utterance = AVSpeechUtterance(string: "This is a book")
utterance.voice = AVSpeechSynthesisVoice(language: "en-US")
synthesizer.speak(utterance)

Aiur3908

func makeInt() -> some Equatable {
    return Int.random(in: 0...10)
}

func makeString() -> some Equatable {
    return "HAHA"
}