Question

我有一个显示随机表情符号的标签，然后我有4个UIButtons。每一个都会显示一个随机的表情符号，其中一个将显示与标签上的表情符号相同的表情符号。它是一个匹配的游戏。

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var faceLabel: UILabel!
@IBOutlet weak var scoreLabel: UILabel!

var randomEmojiNum: UInt32 = arc4random_uniform(6) + 1

override func viewDidLoad() {
    super.viewDidLoad()
    faceLabel.text = genRanNum()
}

func genRanNum() -> String{
    switch randomEmojiNum{
    case 1:  return ""
    case 2:  return ""
    case 3:  return ""
    case 4:  return ""
    case 5:  return ""
    case 6:  return ""
    default: break
    }
    return "Default"
}

func correctAnswerGen() {
    var correct: UInt32 = arc4random_uniform(4)
    switch correct{
    case 0: topLeftAnswer.titleLabel?.text = genRanNum()
    case 1: topRightAnswer.titleLabel?.text = genRanNum()
    case 2: bottomRightAnswer.titleLabel?.text = genRanNum()
    case 3: bottomLeftAnswer.titleLabel?.text = genRanNum()
    default: break
    }
}

@IBOutlet weak var topLeftAnswer: UIButton!
@IBOutlet weak var topRightAnswer: UIButton!
@IBOutlet weak var bottomLeftAnswer: UIButton!
@IBOutlet weak var bottomRightAnswer: UIButton!
}

但是每次我运行它都没有按预期进行。现在我正在随机分配4个UIButton插座中的一个，设置为与标签上的表情符号相同的表情符号，但没有设置插座！

每当我跑步它看起来就像是被选中了。没有任何按钮被设置！我有预感它与设置的插座有关，我设置后编辑值。但是，如果我知道，我不会寻求帮助！哈哈欢呼！

Answer 1

而不是topLeftAnswer.titleLabel?.text只使用：

topLeftAnswer.setTitle("emoji", forState: UIControlState.Normal)

Answer 2

这就是我完成这个的方法：

class ViewController: UIViewController {

    @IBOutlet weak var faceLabel: UILabel!
    @IBOutlet weak var scoreLabel: UILabel!

    @IBOutlet weak var topLeftAnswer: UIButton!
    @IBOutlet weak var topRightAnswer: UIButton!
    @IBOutlet weak var bottomLeftAnswer: UIButton!
    @IBOutlet weak var bottomRightAnswer: UIButton!

    var randomEmojiNum: UInt32 = arc4random_uniform(6) + 1

    override func viewDidLoad() {
        super.viewDidLoad()
        faceLabel.text = genRanNum()
        correctAnswerGen()
    }

    func genRanNum() -> String{
        switch randomEmojiNum{
        case 1:  return ""
        case 2:  return ""
        case 3:  return ""
        case 4:  return ""
        case 5:  return ""
        case 6:  return ""
        default: break
        }
        return "Default"
    }

    func correctAnswerGen() {
        var correct: UInt32 = arc4random_uniform(4)
        switch correct{
        case 0: topLeftAnswer.setTitle(genRanNum(), forState: UIControlState.Normal)
        case 1: topRightAnswer.setTitle(genRanNum(), forState: UIControlState.Normal)
        case 2: bottomLeftAnswer.setTitle(genRanNum(), forState: UIControlState.Normal)
        case 3: bottomRightAnswer.setTitle(genRanNum(), forState: UIControlState.Normal)
        default: break
        }
    }
}

更新：根据OP要求编辑。

UIBottom文本字段未设置

2 个答案: