如何在父視圖控制器中爲動態創建的按鈕創建一個處理程序？

Question

我從ViewController創建了一個subview。在subview中，創建了多個按鈕。當任何創建的按鈕被輕敲時，我想調用父項view controller中的功能buttonTapped()。

class ViewController: UIViewController { 

override func viewDidLoad() { 
    super.viewDidLoad() 

    var bestTeamEver = SFGiants(frame: CGRect(x: 0, y: 100, width: view.bounds.width, height: 40)) 
    view.addSubview(bestTeamEver) 

} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
} 


func buttonTapped(){ 

    NSLog("BUTTON INSIDE SFGIANTS TAPPPED") 

    } 
} 


class SFGiants: UIView { 

override init(frame: CGRect) { 
    super.init(frame: frame) 

    for i in 0...10 { 

     var new_x = i*44 

     var button = UIButton(frame: CGRect(x: new_x, y: 0, width: 40, height: 40)) 
     button.backgroundColor = UIColor.orangeColor() 

     // Call buttonTapped() in parent view controller 
     button.addTarget(self, action: "buttonTapped:", forControlEvents: UIControlEvents.TouchDown) 

     self.addSubview(button) 

    } 
} 

required init(coder aDecoder: NSCoder) { 
    super.init(coder: aDecoder) 
    } 

} 

Answer 1

您可以創建一個自定義init方法，並可以將引用傳遞給父viewController並將其設置爲按鈕目標。

init(frame: CGRect actionListener:UIViewController) { 
    super.init(frame: frame) 
for i in 0...10 { 

     var new_x = i*44 

     var button = UIButton(frame: CGRect(x: new_x, y: 0, width: 40, height: 40)) 
     button.backgroundColor = UIColor.orangeColor() 

     // Call buttonTapped() in parent view controller 
     button.addTarget(actionListener, action: "buttonTapped:", forControlEvents: UIControlEvents.TouchDown) 

     self.addSubview(button) 

    } 
}