為什麼segues不起作用？無法切換視圖 (Why segues does not work? can not switch view)

問題描述

為什麼segues不起作用？無法切換視圖 (Why segues does not work? can not switch view)

**不太清楚為什麼按下計算按鈕時視圖沒有改變？可能的原因是什麼？你能幫忙嗎？

import UIKit

class CalculateViewController: UIViewController {

    @IBOutlet weak var heightLabel: UILabel!

    @IBOutlet weak var weightLabel: UILabel!

    @IBOutlet weak var heightSlider: UISlider!

    @IBOutlet weak var weightSlider: UISlider!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
}

@IBAction func heightSlided(_ sender: UISlider) {
    var currentHeightValue = sender.value
    let roundedHeightValue = String(format: "%.2f", currentHeightValue)
    heightLabel.text = "\(roundedHeightValue)m"
}

@IBAction func weightSlided(_ sender: UISlider) {
    var currentWeightValue = sender.value
    let roundedWeightValue = String(format: "%.0f", currentWeightValue)
    weightLabel.text = "\(roundedWeightValue)kg"
}

@IBAction func calculateBMI(_ sender: UIButton) {
    var squareOfHeight = Float(pow(heightSlider.value, 2.0))
    var BMI = weightSlider.value / squareOfHeight

    self.performSegue(withIdentifier: "goToResult", sender: self)

}

}

</code></pre>





參考解法
(by Natalie)
參考文件


Why segues does not work? can not switch view (CC BY‑SA 2.5/3.0/4.0)