Swift dynamic button create - swift

Question

I am new in swift.
I have created dynamic button by pressing another button in the same viewController with following code:
#IBAction func yenibtn(sender: AnyObject) {
let btn = UIButton()
btn.frame = CGRectMake(10, 10, 50, 50) //set frame
btn.setTitle("btn", forState: .Normal) //set button title
btn.setTitleColor(UIColor.redColor(), forState: .Normal) //set button title color
btn.backgroundColor = UIColor.greenColor() //set button background color
btn.tag = 1 // set button tag
btn.addTarget(self, action: "btnclicked:", forControlEvents: .TouchUpInside) //add button action
self.view.addSubview(btn) //add button in view
}
func clickMe(sender:UIButton!)
{
print("Button Clicked")
}
and I created second viewController and navigate by performSegueWithIdentifier function. When i call back the previous controller the dynamic object disappears. Is there a way to retain dynamic button during reload of the previous ViewController?

Answer 1

Just use this:
var btn:UIButton!
#IBAction func yenibtn(sender: AnyObject) {
btn= UIButton()
btn.frame = CGRectMake(10, 10, 50, 50) //set frame
///... your code
}
UPDATE
Using your code in the second viewcontroller to close
#IBAction func basgeri(sender: AnyObject) {
performSegueWithIdentifier("bir", sender: self)
}
thinking "I'm closing the viewcontroller", BUT YOU ARE WRONG! You create a new ViewController! You are not returning to the previous one!
To fix it use this:
#IBAction func basgeri(sender: AnyObject) {
presentingViewController?.dismissViewControllerAnimated(true, completion: nil)
}