Question

我是编程的新手，在我的Tic-tac-toe游戏中遇到此错误：属性self.circle1未在super.init来电时初始化。

我已经控制拖动并连接了我的UIImage和按钮以及所有这些并且我也尝试从这些声明中取出strong（以使插座变弱）和我我仍然无法运行我的应用程序。这是怎么回事？我的代码：

import UIKit

class ViewController: UIViewController {

//Initializing all imgs as variables:


@IBOutlet strong var circle1: UIImageView
@IBOutlet strong var circle2: UIImageView
@IBOutlet strong var circle3: UIImageView
@IBOutlet strong var circle4: UIImageView
@IBOutlet strong var circle5: UIImageView
@IBOutlet strong var circle6: UIImageView
@IBOutlet strong var circle7: UIImageView
@IBOutlet strong var circle8: UIImageView
@IBOutlet strong var circle9: UIImageView

@IBOutlet strong var circleBtn1: UIButton
@IBOutlet strong var circleBtn2: UIButton
@IBOutlet strong var circleBtn3: UIButton
@IBOutlet strong var circleBtn4: UIButton
@IBOutlet strong var circleBtn5: UIButton
@IBOutlet strong var circleBtn6: UIButton
@IBOutlet strong var circleBtn7: UIButton
@IBOutlet strong var circleBtn8: UIButton
@IBOutlet strong var circleBtn9: UIButton

@IBOutlet strong var resetBtn: UIButton
@IBOutlet strong var ResultsLabel: UILabel

//Creating variables:

var plays = Dictionary<Int,Int>()
var done = false
var aiDeciding = false

//Function that says what to do if a UIButton is clicked:

@IBAction func UIbuttonClicked(sender:UIButton) {
    ResultsLabel.hidden = true
    if !plays[sender.tag] && !aiDeciding && !done {
    setImgforCircle(sender.tag, player:1)

    }

//Executing these functions:

    checkforWin()
    aiTurn()

}

//Function that says sets an X or O in the proper circle depending on player:

func setImgforCircle(spot:Int, player:Int) {
    var playerMark = player == 1 ? "x" : "o"
    plays[spot] = player
    switch spot {
    case 1:
        circle1.image = UIImage(named: playerMark)
    case 2:
        circle2.image = UIImage(named: playerMark)
    case 3:
        circle3.image = UIImage(named: playerMark)
    case 4:
        circle4.image = UIImage(named: playerMark)
    case 5:
        circle5.image = UIImage(named: playerMark)
    case 6:
        circle6.image = UIImage(named: playerMark)
    case 7:
        circle7.image = UIImage(named: playerMark)
    case 8:
        circle8.image = UIImage(named: playerMark)
    case 9:
        circle9.image = UIImage(named: playerMark)

    default:
        circle2.image = UIImage(named: playerMark)
    }

}

//Function that sees if certain paths of circles have the same mark

func checkforWin() {
var whoWon = ["Lost":0, "Won":1]
    for (key,value) in whoWon {
        if ((plays[1] == value && plays[2] == value && plays[3] == value) || //across top row
        (plays[4] == value && plays[5] == value && plays[6] == value) || //across middle row
        (plays[7] == value && plays[8] == value && plays[9] == value) || //across bottom row
        (plays[1] == value && plays[4] == value && plays[7] == value) || //down left column
        (plays[2] == value && plays[5] == value && plays[8] == value) || //down middle column
        (plays[3] == value && plays[6] == value && plays[9] == value) || //down right column
        (plays[1] == value && plays[5] == value && plays[9] == value) || //diagonal going right
        (plays[7] == value && plays[5] == value && plays[3] == value)) { //diagonal going left

            ResultsLabel.hidden = false
            ResultsLabel.text = "You \(key)!"
        }

    }

}
func aiTurn() {

}


override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

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

Answer 1

首先，没有理由拥有所有strong个。删除它们。所有

然后，如果您不想在init（）方法中初始化它们，那么您应该将所有这些选项都设置为可选项。所以采取这样的方式：

@IBOutlet strong var circle1: UIImageView

将其改为：

@IBOutlet var circle1: UIImageView!

More information on the exclamation mark in Swift

Swift出错，需要帮助：属性'self.circle1'未在super.init调用时初始化

1 个答案: