iOS开发Swift-6-深色模式,类与对象,MVC模式,弹出框,闭包-趣味问答App

1.创建趣味问答App项目

 2.创建一个问题文本，水平居中约束。

创建蓝、红两个按钮，放入Stack View中，给StackView水平居中约束，下边约束，设置两按钮间距为20.

 设置进度条view与safe View关系为equal width。设置他们的比例为1：13.

 3.为系统增加深色模式适配(仅限iOS13以上版本)

为Assets中新增新的颜色配置。

 分别为浅色和深色设置颜色。

 选中所有文字，设置为名叫Color的颜色。

 效果：

 4.利用MVC思想编码。

创建新.swift文件，Question.swift:

import Foundationclass Question {var text: Stringvar answer: Boolinit(text: String, answer: Bool){self.text = textself.answer = answer}
}let queastions = [Question(text: "马云是世界首富", answer: false),Question(text: "刘强东最早是在中关村卖光盘的", answer: true),Question(text: "苹果可以吃", answer: true),Question(text: "只要坚持下去就能学好代码", answer: true),Question(text: "王思聪是80后", answer: true),Question(text: "在国内可以正常访问google", answer: false),Question(text: "敲完一万行代码可以变身编程高手", answer: true),Question(text: "撒贝宁说清华还行", answer: false),Question(text: "一直学习变大牛", answer: true),Question(text: "安卓也很好使", answer: true),Question(text: "优酷比b站牛", answer: false),Question(text: "上班可以摸鱼吗", answer: false),Question(text: "这狗iOS系统真的没windows好用啊", answer: true)
]

ViewController.swift:

import UIKitclass ViewController: UIViewController {var questionIndex = 0@IBOutlet weak var questionLabel: UILabel!override func viewDidLoad() {super.viewDidLoad()// Do any additional setup after loading the view, typically from a nib.questionLabel.text = queastions[0].text}@IBAction func answerPressed(_ sender: UIButton) {if sender.tag == 1 {if queastions[questionIndex].answer == true{print("huidazhengque")}else{print("huidacuowu")}}else{if queastions[questionIndex].answer == true{print("huidacuowu")}else{print("huidazhengque")}}questionIndex += 1if questionIndex <= 12{questionLabel.text = queastions[questionIndex].text}else{questionIndex = 0}}override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated.}
}

 5.创建弹窗

ViewController.swift:

import UIKitclass ViewController: UIViewController {var questionIndex = 0@IBOutlet weak var questionLabel: UILabel!override func viewDidLoad() {super.viewDidLoad()// Do any additional setup after loading the view, typically from a nib.questionLabel.text = queastions[0].text}@IBAction func answerPressed(_ sender: UIButton) {if sender.tag == 1 {if queastions[questionIndex].answer == true{print("huidazhengque")}else{print("huidacuowu")}}else{if queastions[questionIndex].answer == true{print("huidacuowu")}else{print("huidazhengque")}}questionIndex += 1if questionIndex <= 12{questionLabel.text = queastions[questionIndex].text}else{let alert = UIAlertController(title: "漂亮！", message: "您已经完成了所有问题，要再来一遍吗？", preferredStyle: .alert)alert.addAction(UIAlertAction(title: "再来一遍", style: .default, handler: { _ in}))self.present(alert, animated: true)}}override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated.}
}

 6.启动测试

 7.完善再来一遍，整理代码。

ViewController.swift:

import UIKitclass ViewController: UIViewController {var questionIndex = 0@IBOutlet weak var questionLabel: UILabel!override func viewDidLoad() {super.viewDidLoad()// Do any additional setup after loading the view, typically from a nib.questionLabel.text = queastions[0].text}@IBAction func answerPressed(_ sender: UIButton) {if sender.tag == 1 {if queastions[questionIndex].answer == true{print("huidazhengque")}else{print("huidacuowu")}}else{if queastions[questionIndex].answer == true{print("huidacuowu")}else{print("huidazhengque")}}questionIndex += 1nextQuestion()}func nextQuestion(){if questionIndex <= 12{questionLabel.text = queastions[questionIndex].text}else{questionIndex = 0let alert = UIAlertController(title: "漂亮！", message: "您已经完成了所有问题，要再来一遍吗？", preferredStyle: .alert)let action = UIAlertAction(title: "再来一遍", style: .default, handler: { _ inself.questionLabel.text = queastions[0].text})alert.addAction(action)//present(alert, animated: true)}}override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated.}}