將動作添加到UIBarButtonItem Swift

Question

按鈕是在故事板中創建的，我想添加一個動作。

self.cancel.action = NSSelectorFromString("cancel:") 

func cancel(sender: UIBarButtonItem) ->() { 
} 

這不行。由於

Answer 1

看我的。

1. 將UIButton添加到UIBarbuttonitem。

   self.navigationController?.navigationBarHidden = false 
   
   //making a button 
   var button: UIButton = UIButton() 
   button.setImage(UIImage(named: "person-icon.jpg"), forState: .Normal) 
   button.frame = CGRectMake(0, 0, 25, 25) 
   button.targetForAction("actioncall", withSender: self) 
   button.addTarget(self, action: "actioncall", forControlEvents: UIControlEvents.TouchUpInside) 
   
   //making a UIBarbuttonItem on UINavigationBar 
   var rightItem:UIBarButtonItem = UIBarButtonItem() 
   rightItem.customView = button   
   self.navigationItem.rightBarButtonItem = rightItem 
   

2. 一個初始化的UIBarButtonItem

   let rightNavItem = UIBarButtonItem(image: UIImage(named: "search1x"), landscapeImagePhone: nil, style: UIBarButtonItemStyle.Plain, target: self, action: "actioncall") 
   navigationItem.rightBarButtonItem = rightNavItem 
   

3. OR

   let rightNavItem = UIBarButtonItem() 
   rightNavItem.action = "action call" 
   
   
   //Anticipated Method on clicking uibarbuttonitem 
   func actioncall(){ 
   } 
   

Answer 2

就在您的SWIFT類中創建一個功能類似於下面

@IBAction func cancel() { 
    // your code 
} 

，並且被Ctrl拖動從按鈕到您的視圖控制器，它在故事板連接。

Answer 3

@IBAction func action() { 
    // your code 
}  

    var button = UIButton.buttonWithType(UIButtonType.System) as UIButton 
    button.frame = CGRectMake(100, 100, 100, 50) 
    button.backgroundColor = UIColor.greenColor() 
    button.setTitle("Button", forState: UIControlState.Normal) 
    button.addTarget(self, action: "action", forControlEvents: UIControlEvents.TouchUpInside) 
    self.view.addSubview(button) 

Answer 4

或者，如果選擇在不同的類

let barBtn = UIBarButtonItem(title: nil, style: UIBarButtonItemStyle.Plain, target: self, action: #selector(CustomToolbarItemsClass.testSelector)) 


//This is in CustomToolbarItemsClass class 
@objc static func testSelector(){ 
print("Hello!") 
}