如何通过按下位于单独视图中的按钮来增加标签？

问题描述：

所以基本上我很熟悉应用程序开发和Xcode，但我仍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个问题的末尾，我有一个页面，显示用户在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上的按钮以使结果页面上的标签增加1。到目前为止，我尝试了许多不同的方法，但似乎无法完全弄明白。我已经将我的按钮连接到它们各自的视图控制器，并将它们作为操作并将其标签分配给它们各自的视图控制器。如何通过按下位于单独视图中的按钮来增加标签？

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 
} 
}

答

我相信它不工作的原因是因为你被分配修正值viewDidLoad方法标记之前分配0值。您可以实现这样的要求的行为：

修改结果视图控制器如下：

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 

} 
}

如何通过按下位于单独视图中的按钮来增加标签？

相关推荐