Question

基本上我对应用程序开发和Xcode很熟悉，但我还处于学习的开始阶段，我需要一些帮助。我创建了一个情绪测验类型的用户界面，在10个问题的最后，我有一个页面，显示用户在整个测验中获得的不同情绪和分数。我需要帮助的是用户单击问题1上的按钮以使我的结果页面上的标签增加1.我到目前为止尝试了许多不同的方法，但似乎无法弄明白。我已将我的按钮链接到各自的视图控制器作为操作，并将标签链接到各自的视图控制器作为插座。

    import UIKit

class Question1: UIViewController {

@IBAction func buttonlightgreen(_ sender: UIButton) {
    print ("light green")
    sadscoreText += 1

}

@IBAction func buttonred(_ sender: Any) {
    print ("red")
    angryscoreText += 2
    happyscoreText += 1
}

@IBAction func buttonpurple(_ sender: Any) {
    print ("purple")
    annoyedscoreText += 1
    stressedscoreText += 1
}

@IBAction func buttondarkgreen(_ sender: Any) {
    print ("dark green")
    relaxedscoreText += 2
    tiredscoreText += 1
}

@IBAction func buttonyellow(_ sender: Any) {
    print ("yellow")
    happyscoreText += 1
}



override func viewDidLoad() {

    super.viewDidLoad()

}



}

这是按钮的代码，这是标签的代码。

    import UIKit

var sadscoreText = 0
var happyscoreText = 0
var relaxedscoreText = 0
var angryscoreText = 0
var annoyedscoreText = 0
var tiredscoreText = 0
var stressedscoreText = 0

class Results: UIViewController {

@IBOutlet weak var sadscore: UILabel!
@IBOutlet weak var happyscore: UILabel!
@IBOutlet weak var relaxedscore: UILabel!
@IBOutlet weak var angryscore: UILabel!
@IBOutlet weak var annoyedscore: UILabel!
@IBOutlet weak var tiredscore: UILabel!
@IBOutlet weak var stressedscore: UILabel!


var sadscoreText: Int = 0 {
    didSet {
        sadscore.text = "\(sadscoreText)"
    }
}

override func viewDidLoad() {
    super.viewDidLoad()

    sadscoreText = 0
    happyscoreText = 0
    relaxedscoreText = 0
    angryscoreText = 0
    annoyedscoreText = 0
    tiredscoreText = 0
    stressedscoreText = 0
}
}

Answer 1

我认为它不起作用的原因是因为在将修改后的值分配给viewDidLoad方法中的标签之前，您要为值赋值0。您可以像这样实现所需的行为：

修改Results视图控制器，如下所示：

import UIKit

var sadscoreText = 0
var happyscoreText = 0
var relaxedscoreText = 0
var angryscoreText = 0
var annoyedscoreText = 0
var tiredscoreText = 0
var stressedscoreText = 0

class Results: UIViewController {

@IBOutlet weak var sadscore: UILabel!
@IBOutlet weak var happyscore: UILabel!
@IBOutlet weak var relaxedscore: UILabel!
@IBOutlet weak var angryscore: UILabel!
@IBOutlet weak var annoyedscore: UILabel!
@IBOutlet weak var tiredscore: UILabel!
@IBOutlet weak var stressedscore: UILabel!


override func viewDidLoad() {
    super.viewDidLoad()

    sadscore.text = "\(sadscoreText)"
    happyscore.text = "\(happyscoreText)"
//follow the same for other labels

//you can set the values again to zero after showing the labels on the screen like this
    sadscoreText = 0
    happyscoreText = 0

}
}

如何通过按单独视图中的按钮来增加标签？

1 个答案: