Segue在MPC视图控制器被解散后不运行

Question

我绑定了一个操作来弹出MPC视图控制器但是一旦这个操作完成并且浏览器被关闭，我就会回到我的旧视图控制器

func browserViewControllerDidFinish(
browserViewController: MCBrowserViewController!)  {
    // Called when the browser view controller is dismissed (ie the Done
    // button was tapped)
    func seguetoJoin(segue: UIStoryboardSegue, sender: AnyObject?) {
        var joinView: playMusicViewController = segue.destinationViewController as! playMusicViewController
         weak var delegate: MCBrowserViewControllerDelegate!
    }
    self.dismissViewControllerAnimated(true, completion: nil)

}

Answer 1

你似乎正在接收didFinish回调的VC上调用遣散viewcontroller。

你应该把segue代码移到需要执行segue的ViewController上，而不是在一个正在被解散的ViewController上执行它。

同样，这些都是未使用的

var joinView: playMusicViewController = segue.destinationViewController as! playMusicViewController
weak var delegate: MCBrowserViewControllerDelegate!

更新——

跟随下面的评论。

在mpcSubClass.m

var viewControllerToPeformSegue: UIViewController!

func browserViewControllerDidFinish(browserViewController: MCBrowserViewController!)  {
    // animation:false as your segue will have an animation
    self.dismissViewControllerAnimated(false, completion: nil)
    self.viewControllerToPerformSegue.handleBrowserDidFinish()
}

在viewControllerToPerformSegue.m

// when you initialise the MPC VC subclass
mpcVCSubclass.viewControllerToPerformSegue = self
func handleBrowserDidFinish()
{
     self.performSegueWithIdentifier("mainViewSegue", sender: self)
}
override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) 
{
     if segue.identifier == "mainViewSegue"
    {
        let mainVC = segue.destination as! MainVC
        // now pass any data to your main VC that it can load in viewWillAppear
    }
}

在故事板

链接viewControllerToPerformSegue到MainVC，并将segue命名为mainViewSegue