Question

我想解散ViewController并呈现另一个ViewController。这是我的代码：

MainVC：

@IBAction func loadFirstVCClicked(_ sender: UIButton)
{
    self.present(FirstViewController.loadVC()
}

FirstViewController：

static func load() -> FirstViewController
{
    let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "FirstViewController") as! FirstViewController
    return vc
}
@IBAction func exitClicked(_ sender: UIButton)
{
    self.dismiss(animated: true, completion: {
        self.present(SecondViewController.loadVC()
    })
}

SecondViewController：

static func loadVC() -> SecondViewController
{
    let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
    return vc
}

@IBAction func exitClicked(_ sender: UIButton)
{
    self.dismiss(animated: true, completion: {
        //present MainVC - second VC should work as an interstitial ad
    })
}

我收到此错误：＆＃34; FirstViewController上的SecondViewController，其视图不在窗口层次结构中！＆＃34;

它并没有显示出来。所以基本上我希望SecondViewController成为SecondViewController和MainVC didLoad之间的一种插页式广告

基本方案：

FirstViewController-＆GT; SecondViewController-＆GT; MainVC

您的任何建议都会非常感激。谢谢！

Answer 1

您不应该使用静态函数来创建viewcontrollers。显示插页式首页打开主视图控件和onViewDidAppear的正确方法是显示广告视图控件

@IBAction func loadFirstVCClicked(_ sender: UIButton)
{
    let firstViewController = self.storyboard?.instantiateViewController(withIdentifier: "FirstViewController") as! FirstViewController
    self.present(firstViewController)
}

@IBAction func loadMainVCClicked(_ sender: UIButton)
{
    let mainViewController = self.storyboard?.instantiateViewController(withIdentifier: "MainViewController") as! MainViewController
    self.present(firstViewController)
}

class MainViewController: UIViewController {

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)

        // there you can present your interstitial viewcontroller
    }

}

class InterstitialViewController: UIViewController {

    // when user press close or after a time limit dismiss 

}

协议（代表）样本

// give the name you want
protocol LiveProtocol: class {

    func onFirstViewControllerDismissed()

}

在firstviewcontroller之前你的实时viewcontroller

class LiveViewController: UIViewController, LiveProtocol {

    ...

    internal func onFirstViewControllerDismissed() {

        // present your interstitial 

    }

}

解散ViewController并呈现另一个ViewControlloer - IOS - Swift 3

1 个答案: