控制 3 分段

Posted 2023-02-24

【中文标题】控制 3 分段

【英文标题】：control 3 Segmented

【发布时间】：2016-10-29 05:36:42

【问题描述】：

我正在使用 Xcode 8.1 , swift 3.0

我有代码用 2 个控件分段它的工作

当我尝试添加 3 时，它不知道我的代码有什么问题

这一项与 2 Segmented 一起工作

@IBAction func showComponent(_ sender: UISegmentedControl) 
   if sender.selectedSegmentIndex == 0 
      UIView.animate(withDuration: 0.0, animations: 
         self.containerViewA.alpha = 1
         self.containerViewB.alpha = 0
      )     
    else 
      UIView.animate(withDuration: 0.0, animations: 
         self.containerViewA.alpha = 0
         self.containerViewB.alpha = 1
      )
    
 

这个不能使用 3 Segmented

这里正在尝试使用 3x 分段控制的新代码；

@IBAction func showComponent(_ sender: UISegmentedControl) 
   if sender.selectedSegmentIndex == 0 
      UIView.animate(withDuration: 0.5, animations: 
         self.containerViewA.alpha = 1
         self.containerViewB.alpha = 0
         self.containerViewC.alpha = 0
      )

      UIView.animate(withDuration: 0.5, animations: 
         self.containerViewA.alpha = 0
         self.containerViewB.alpha = 1
         self.containerViewC.alpha = 0
    else      
      UIView.animate(withDuration: 0.5, animations: 
         self.containerViewA.alpha = 0
         self.containerViewB.alpha = 0
         self.containerViewC.alpha = 1
      )
    
 

【参考方案1】：

我正在尝试使用这段代码，现在它的工作：)

import UIKit
class ViewController: UIViewController 
    @IBOutlet weak var orange: UIView!
    @IBOutlet weak var yellow: UIView!
    @IBOutlet weak var red: UIView!
    override func viewDidLoad() 
        super.viewDidLoad()
        // 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 showComponent(_ sender: UISegmentedControl) 
        if sender.selectedSegmentIndex == 0 
                self.orange.alpha = 1
              self.yellow.alpha = 0
                self.red.alpha = 0
        
              if sender.selectedSegmentIndex == 1 
                self.orange.alpha = 0
                 self.yellow.alpha = 1
               self.red.alpha = 0
        
                if sender.selectedSegmentIndex == 2 
               self.orange.alpha = 0
                self.yellow.alpha = 0
                self.red.alpha = 1