动作按钮只能工作一次

Question

我正在做一个ios应用程序，我有一个按钮，每次点击时都需要运行大量计算，但按钮操作仅在第一次运行。谁能帮我这个 ？

这是按钮的代码：

@IBAction func Calculate_btn(_ sender: UIButton) { 

    s2 = 0.0 
    mintext.text = "" 
    maxtext.text = "" 
    avtext.text = "" 

    if speedUser.text == "" { 
     let alert = UIAlertController(title: "Error", message: "Give the speed to calculate the new temperature !", preferredStyle: UIAlertControllerStyle.alert) 
     alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil)) 
     self.present(alert, animated: true, completion: nil) 
    } 

    else if (Int(speedUser.text!)!<0) || (Int(speedUser.text!)!>20) { 
     let alert = UIAlertController(title: "Error", message: "Give a valid speed : between 0 and 20 Km/h!", preferredStyle: UIAlertControllerStyle.alert) 
     alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil)) 
     self.present(alert, animated: true, completion: nil) 

    } 

    else { 
     refTot = ref + ref2 
     rcfTot = rcf + rcf2 
     airPermTot = airPermFab + airPermFab2 

     print("refTot",refTot) 
     print("rcfTot",rcfTot) 
     print("airPermTot",airPermTot) 

     var s2 = (speedUser.text! as NSString).floatValue 

     Calcul(s: s2, rc: refTot, re: rcfTot, air: airPermTot) 

     s2 = 0 

    } 
} 

Answer 1

如果你想在按钮中重新加载数据这个环节是相似的。他们在其按钮内调用一个功能:) reloadData() isn't work in swift