按钮仅在两次敲击时起作用

Question

我有两个按钮，每个按钮与另一个视图控制器都有不同的选择，只有在满足某些条件时才触发。由于某种原因，其中一个按钮可以正常工作，另一个按钮必须敲击两次，才能将其转移到下一个视图控制器上。奇怪的部分是，如果复制和粘贴条件并稍作修改以转到各自的VC，则两个按钮和SEGUE的代码。我如何在第一个点击中获得两个按钮？

到目前为止，我已经尝试过：

1. 重新排序按钮函数
2. 重新排序segue函数
3. 删除/重新连接按钮
4. 删除/重新连接按钮，

我相信它与以下代码有关该应用程序中的类似功能几乎具有相同的代码（减去下面的部分）效果很好。我确实需要它，但是由于测试了零/错误：

override func shouldPerformSegue(withIdentifier identifier: String, sender: Any?) -> Bool {
    return nextButton
}

这是代码

import UIKit

class bathShowerMeasurementViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()
 
    self.hideKeyboardWhenTappedAround()

    
}


var nextButton = false

@IBOutlet weak var inchesButton: UIButton!
@IBAction func inches(_ sender: UIButton) {
    if sender.isSelected {
        sender.isSelected = false
    } else {
        sender.isSelected = true
    }
}

@IBOutlet weak var unitError: UILabel!
@IBOutlet weak var centimeterButton: UIButton!
@IBAction func centimeter(_ sender: UIButton) {
    if sender.isSelected {
        sender.isSelected = false
    } else {
        sender.isSelected = true
    }
}
@IBOutlet weak var length: UITextField!
@IBOutlet weak var lenghtError: UILabel!
@IBOutlet weak var width: UITextField!
@IBOutlet weak var widthError: UILabel!
@IBOutlet weak var height: UITextField!
@IBOutlet weak var heightError: UILabel!


@IBAction func showerCalc(_ sender: UIButton) {
    
    let widthTub = Double(width.text!)
    let lengthTub = Double(length.text!)
    let heightTub = Double(height.text!)

    var enableNextButton = true

    if widthTub == nil || widthTub == 0.0 {
        widthError.text = "Enter Width"
        enableNextButton = false
    }
    if heightTub == nil || heightTub == 0.0 {
        heightError.text = "Enter Height"
        enableNextButton = false
    }
    if lengthTub == nil || lengthTub == 0.0 {
        lenghtError.text = "Enter Length"
        enableNextButton = false
    }
    switch (inchesButton.isSelected, centimeterButton.isSelected) {
        case (false, false):
            unitError.text = "Please Select A Unit"
            enableNextButton = false
        case (true, true):
            unitError.text = "Only Select One Unit"
            enableNextButton = false
        default: break
    }
    nextButton = enableNextButton
    
}


@IBAction func goToShower(_ sender: UIButton) {
  
    let widthTub = Double(width.text!)
    let lengthTub = Double(length.text!)
    let heightTub = Double(height.text!)

    var enableNextButton = true

    if widthTub == nil || widthTub == 0.0 {
        widthError.text = "Enter Width"
        enableNextButton = false
    }
    if heightTub == nil || heightTub == 0.0 {
        heightError.text = "Enter Height"
        enableNextButton = false
    }
    if lengthTub == nil || lengthTub == 0.0 {
        lenghtError.text = "Enter Length"
        enableNextButton = false
    }
    switch (inchesButton.isSelected, centimeterButton.isSelected) {
        case (false, false):
            unitError.text = "Please Select A Unit"
            enableNextButton = false
        case (true, true):
            unitError.text = "Only Select One Unit"
            enableNextButton = false
        default: break
    }
    nextButton = enableNextButton
    
}
  

override func shouldPerformSegue(withIdentifier identifier: String, sender: Any?) -> Bool {
    return nextButton
}


override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    let bathLength = Double(length.text!)
    let bathWidth = Double(width.text!)
    let bathHeight = Double(height.text!)
    let water = Double(bathLength! *  bathWidth! * bathHeight!)
    
    if (segue.identifier == "showerCalc") {
        
        if inchesButton.isSelected == true{
        let bathWater = water / 231
        let destinationVC = segue.destination as! showerFillMethodViewController
        destinationVC.bathFlow = String(bathWater)
        }
        
        if centimeterButton.isSelected == true{
        let bathWater = water / 3785.41
        let destinationVC = segue.destination as! showerFillMethodViewController
        destinationVC.bathFlow = String(bathWater)
                    
            }
           
    }
    
    if (segue.identifier == "showerTool") {
     
       if inchesButton.isSelected == true{
       let bathWater = water / 231
       let destinationVC = segue.destination as! showerFlowMainViewController
           destinationVC.bathFlow = String(bathWater)
           
       }
       
       if centimeterButton.isSelected == true{
       let bathWater = water / 3785.41
           let destinationVC = segue.destination as! showerFlowMainViewController
               destinationVC.bathFlow = String(bathWater)
       
        }
   } 
}
}