segmentedcontrol/textfield/DidChange

Question

我有一個segmentedControl給一個文本字段的字符串。另外我還有2個textfields。一個用於用戶輸入，另一個用於從分段控制文本字段和用戶輸入文本字段進行計算。當segmentedcontrolindex發生變化時，如何自動更新計算文本字段。 對於用戶輸入文本字段textfielddidchangemethod的作品。由於

@IBOutlet weak var segmentedcontrol: UISegmentedControl! 



@IBOutlet weak var textf: UITextField! 
@IBOutlet weak var textf1: UITextField! 
@IBOutlet weak var textf2: UITextField! 



override func viewDidLoad() { 
    super.viewDidLoad() 




    textf.delegate = self 
    textf1.delegate = self 
    textf2.delegate = self 

    // Do any additional setup after loading the view, typically from a nib. 
} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 



@IBAction func textf1(sender: AnyObject) { 


    let result = (textf.text! as NSString).doubleValue * (textf2.text! as NSString).doubleValue 

    textf1.text = String(format:"%.2f", result) 

} 



@IBAction func segmentedcontrolAction(sender: AnyObject) { 

    if(segmentedcontrol.selectedSegmentIndex == 0) 
    { 
     textf2.text = "5"; 
    } 
    else if(segmentedcontrol.selectedSegmentIndex == 1) 
    { 
     textf2.text = "10"; 
    } 
    else if(segmentedcontrol.selectedSegmentIndex == 2) 
    { 
     textf2.text = "15"; 
    } 


} 

Answer 1

@IBAction func segmentedcontrolAction(sender: AnyObject) 
{ 

    if(segmentedcontrol.selectedSegmentIndex == 0) 
    { 
     textf2.text = "5"; 


    } 
    else if(segmentedcontrol.selectedSegmentIndex == 1) 
    { 
     textf2.text = "10"; 


    } 
    else if(segmentedcontrol.selectedSegmentIndex == 2) 
    { 
     textf2.text = "15"; 


    } 
     let result = (textf.text! as NSString).doubleValue * (textf2.text! as NSString).doubleValue 
     textf1.text = String(format:"%.2f", result) 

}