Question

我有2个viewcontrollers：mainVC＆amp; listVC。我点击了mainVC上的自定义按钮来显示listVC，然后点击listVC上的按钮返回mainVC。到现在为止没有任何失败。但当我点击自定义按钮再次进入listVC时，程序失败。

错误： NSInvalidArgumentException＆＃39;，原因：＆＃39;应用程序试图在自身上呈现模态视图控制器。提出控制器是 Voice_of_Animals.ListVC：0x7feeee513210＆gt;

class ViewController: UIViewController

{

var cb = CirButton(Circolor: UIColor.cyan, Rsize: 100, PositionX: 100, PositionY: 100)
override func viewDidLoad() {
    super.viewDidLoad()
    mainVC = self
    self.view.addSubview(cb)
    listVC.transitioningDelegate = listVC as UIViewControllerTransitioningDelegate

}

func showNextPage() {
self.present(listVC, animated: true, completion: nil)
}

@IBAction func show(_ sender: UIButton) {
self.present(listVC, animated: true, completion: nil)
}
@IBAction func Touch(_ sender: CButton) {
    sender.RunAnimation()
}
override func didReceiveMemoryWarning() {
}

}

 class ListVC: ViewController{
var transition = FadeAnimator()
var btn1 = CirButton(Circolor: UIColor.cyan, Rsize: 100, PositionX: 100, PositionY: 100)
@IBOutlet weak var myList: ListView!
@IBAction func Push(_ sender: UIButton) {
}

@IBAction func edgeSlide(_ sender: UIScreenEdgePanGestureRecognizer) {
  mainVC.dismiss(animated: true, completion: nil)
}
override func viewDidLoad() {
    super.viewDidLoad()
    self.view.addSubview(btn1)
}

}

存在UIviewcontroller时失败

0 个答案: