UISegmentedControl編程

Question

我已經創建了一個包含一個視圖控制器：

• UISegmentedControl
• 集裝箱

我想，當我從另一種觀點來以編程方式更改選擇。 我試着用：

if let previousSelection = NSUserDefaults.standardUserDefaults().stringForKey("SEGMENT_CONTROL") { 
     segmentSaved = Int(previousSelection)! 
    } 

    if (segmentSaved == 0) { 
     mySegmentControl.selectedSegmentIndex = segmentSaved 
    } else if (segmentSaved == 1) { 
     mySegmentControl.selectedSegmentIndex = segmentSaved 
    } else if (segmentSaved == 2) { 
     mySegmentControl.selectedSegmentIndex = segmentSaved 
    } else { 
     print("Error") 
    } 

它需要從內存中一個int，並用它作爲UISegmentedControl的指數。它可以工作，但不會更改容器中的視圖。

我該如何改變容器？

這是它如何工作的：

let viewControllerIdentifiers = ["ViewController1", "ViewController2", "ViewController3"] 

@IBAction func segmentController(sender: UISegmentedControl) { 

    let newController = (storyboard?.instantiateViewControllerWithIdentifier(viewControllerIdentifiers[sender.selectedSegmentIndex]))! as UIViewController 
    let oldController = childViewControllers.last! as UIViewController 

    oldController.willMoveToParentViewController(nil) 
    addChildViewController(newController) 
    newController.view.frame = oldController.view.frame 

    transitionFromViewController(oldController, toViewController: newController, duration: 0.25, options: .TransitionCrossDissolve, animations:{() -> Void in 
     }, completion: { (finished) -> Void in 
      oldController.removeFromParentViewController() 
      newController.didMoveToParentViewController(self) 

    }) 


} 

Answer 1

只要打電話功能self.segmentController(mySegmentControl)更改選定索引之後。