ios - Swift - 预期声明在 'View Controller' 的声明中

Question

注意:我是自学的。最近几天我一直在使用 Swift。我有一个可以教我基础知识的应用程序。

好的，所以我一直在阅读，我发现了这个错误的 2 个可能原因。1.是我没有方法/函数中的代码吗2.我是不是少了一个

所以它只是突出了:

class ViewController: UIViewController, UIPickerViewDelegate

它还在 ViewController 中的 V 下方放置了一个红色小箭头。然后错误状态:

In Declaration of 'View Controller'

我不确定还有什么可能。唯一不属于函数的代码是数组声明。我把它们放在 @IBOutlets 之后和 override func 之前。其他一切都在覆盖函数或函数中。

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate
{
    // connects the text fields
    @IBOutlet var raceViewer: UITextField!
    @IBOutlet var strStat: UITextField!
    @IBOutlet var dexStat: UITextField!
    @IBOutlet var conStat: UITextField!
    @IBOutlet var intStat: UITextField!
    @IBOutlet var wisStat: UITextField!
    @IBOutlet var chrStat: UITextField!

    // connects stats for human, half-elf, half-orc
    @IBOutlet var singleStat: UITextField!

    // connects the picker views
    @IBOutlet var racePicker: UIPickerView!
    @IBOutlet var statPicker: UIPickerView!
    @IBOutlet var singleStatPicker: UIPickerView!

    // connects the labels for the race modifications
    @IBOutlet var raceStr: UILabel!
    @IBOutlet var raceDex: UILabel!
    @IBOutlet var raceCon: UILabel!
    @IBOutlet var raceInt: UILabel!
    @IBOutlet var raceWis: UILabel!
    @IBOutlet var raceChr: UILabel!

    // connects the labels for final modification


    // connects the labels for mod



    // defines the arrays
    var races = ["","Dwarf","Elf","Gnome","Half-Elf","Half-Orc","Halfling","Human","Ifrit","Oread","Sylph","Tengu","Undine","Kitsune","Nagaji","Wayang"]
    var abilStats = ["","7","8","9","10","11","12","13","14","15","16","17","18"]
    var single = ["Strength","Dexterity","Constitution","Intelligence","Wisdom","Charisma"]

    override func viewDidLoad()
    {
        super.viewDidLoad()
        racePicker = UIPickerView()
        statPicker = UIPickerView()
        singleStatPicker = UIPickerView()

        racePicker.delegate = self
        statPicker.delegate = self
        singleStatPicker.delegate = self

        self.raceViewer.inputView = self.racePicker
        self.singleStat.inputView = self.singleStatPicker
        self.strStat.inputView = self.statPicker
        self.dexStat.inputView = self.statPicker
        self.conStat.inputView = self.statPicker
        self.intStat.inputView = self.statPicker
        self.wisStat.inputView = self.statPicker
        self.chrStat.inputView = self.statPicker

        // set the tags for the pickerview
        racePicker.tag = 0
        statPicker.tag = 1
        singleStatPicker.tag = 2

        // Do any additional setup after loading the view, typically from a nib.
        //let racePickerView = UIPickerView()
        //racePickerView.delegate = self
        //raceViewer.inputView = racePicker

        singleStat.isHidden = true
    }

    override func didReceiveMemoryWarning()
    {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    func numberOfComponentsInPickerView(_ pickerView: UIPickerView) -> Int
    {
        return 1
    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int
    {
        if pickerView.tag == 0
        {
            return races.count
        }
        else if pickerView.tag == 1
        {
            return abilStats.count
        }
        else if pickerView.tag == 2
        {
            return single.count
        }
        return 1
    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String?
    {
        if pickerView.tag == 0
        {
            return races[row]
        }
        else if pickerView.tag == 1
        {
            return abilStats[row]
        }
        else if pickerView.tag == 2
        {
           return single[row]
        }

        return ""
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)
    {
        if pickerView.tag == 0
        {
            raceViewer.text = races[row]

            // Dwarf
            if raceViewer.text == races[1]
            {
                // values changed
                raceCon.text = "2"
                raceWis.text = "2"
                raceChr.text = "-2"

                // values reset
                raceStr.text = "0"
                raceDex.text = "0"
                raceInt.text = "0"

                // hides the singleStat text field
                singleStat.isHidden = true
            }

            // Elf
            else if raceViewer.text == races[2]
            {
                // values changed
                raceDex.text = "2"
                raceCon.text = "-2"
                raceInt.text = "2"

                // values reset
                raceStr.text = "0"
                raceWis.text = "0"
                raceChr.text = "0"

                // hides the singleStat text field
                singleStat.isHidden = true
            }

            // Gnome
            else if raceViewer.text == races[3]
            {
                // values changed
                raceStr.text = "-2"
                raceCon.text = "2"
                raceChr.text = "2"

                // values reset
                raceDex.text = "0"
                raceInt.text = "0"
                raceWis.text = "0"

                // hides the singleStat text field
                singleStat.isHidden = true
            }

            // Half-Elf
            else if raceViewer.text == races[4]
            {
                // values reset
                raceStr.text = "0"
                raceDex.text = "0"
                raceCon.text = "0"
                raceInt.text = "0"
                raceWis.text = "0"
                raceChr.text = "0"

                // shows the singleStat text field
                singleStat.isHidden = false
            }

            // Half-Orc
            else if raceViewer.text == races[5]
            {
                // values reset
                raceStr.text = "0"
                raceDex.text = "0"
                raceCon.text = "0"
                raceInt.text = "0"
                raceWis.text = "0"
                raceChr.text = "0"

                // shows the singleStat text field
                singleStat.isHidden = false
            }

            // Halfling
            else if raceViewer.text == races[6]
            {
                // values changed
                raceStr.text = "-2"
                raceDex.text = "2"
                raceChr.text = "2"

                // values reset
                raceCon.text = "0"
                raceInt.text = "0"
                raceWis.text = "0"

                // hides the singleStat text field
                singleStat.isHidden = true
            }

            // Human
            else if raceViewer.text == races[7]
            {
                // values reset
                raceStr.text = "0"
                raceDex.text = "0"
                raceCon.text = "0"
                raceInt.text = "0"
                raceWis.text = "0"
                raceChr.text = "0"

                // shows the singleStat text field
                singleStat.isHidden = false
            }

            // Ifrit
            else if raceViewer.text == races[8]
            {
                // values changed
                raceDex.text = "2"
                raceWis.text = "-2"
                raceChr.text = "2"

                // values reset
                raceStr.text = "0"
                raceCon.text = "0"
                raceInt.text = "0"

                // hides the singleStat text field
                singleStat.isHidden = true
            }

            // Oread
            else if raceViewer.text == races[9]
            {
                // values changed
                raceStr.text = "2"
                raceWis.text = "2"
                raceChr.text = "-2"

                // values reset
                raceDex.text = "0"
                raceCon.text = "0"
                raceInt.text = "0"

                // hides the singleStat text field
                singleStat.isHidden = true
            }

            // Sylph
            else if raceViewer.text == races[10]
            {
                // values changed
                raceDex.text = "2"
                raceCon.text = "-2"
                raceInt.text = "2"

                // values reset
                raceStr.text = "0"
                raceWis.text = "0"
                raceChr.text = "0"

                // hides the singleStat text field
                singleStat.isHidden = true
            }

            // Tengu
            else if raceViewer.text == races[11]
            {
                // values changed
                raceStr.text = "-2"
                raceDex.text = "2"
                raceWis.text = "2"

                // values reset
                raceCon.text = "0"
                raceInt.text = "0"
                raceChr.text = "0"

                // hides the singleStat text field
                singleStat.isHidden = true
            }

            // Undine
            else if raceViewer.text == races[12]
            {
                // values changed
                raceStr.text = "-2"
                raceDex.text = "2"
                raceWis.text = "2"

                // values reset
                raceCon.text = "0"
                raceInt.text = "0"
                raceChr.text = "0"

                // hides the singleStat text field
                singleStat.isHidden = true
            }

            // Kitsune
            else if raceViewer.text == races[13]
            {
                // values changed
                raceStr.text = "-2"
                raceDex.text = "2"
                raceChr.text = "2"

                // values reset
                raceCon.text = "0"
                raceInt.text = "0"
                raceWis.text = "0"

                // hides the singleStat text field
                singleStat.isHidden = true
            }

            // Nagagi
            else if raceViewer.text == races[14]
            {
                // values changed
                raceStr.text = "2"
                raceInt.text = "-2"
                raceChr.text = "2"

                // values reset
                raceDex.text = "0"
                raceCon.text = "0"
                raceWis.text = "0"

                // hides the singleStat text field
                singleStat.isHidden = true
            }

            // Wayang
            else if raceViewer.text == races[15]
            {
                // values changed
                raceDex.text = "2"
                raceInt.text = "2"
                raceWis.text = "-2"

                // values reset
                raceStr.text = "0"
                raceCon.text = "0"
                raceChr.text = "0"

                // hides the singleStat text field
                singleStat.isHidden = true
            }
        }
    }
}

Answer 1

我测试了您的代码，就其本身而言，它没问题。

但是，如果您制作的两个文件都使用 ViewController 类名，则会收到您提供的错误消息。

在 iOS 中，您不能创建两个或多个具有相同名称的对象(类、结构和枚举)以避免命名冲突。

请重命名您遇到问题的类，看看问题是否已解决。