How can I dismiss a modal segue then perform push segue to new view controller

问题

I'm trying to perform a push segue from a navigation controller, after dismissing a modal that was previously presented over the navigation controller.

Inside modal (UIViewController):

func textFieldShouldReturn(textField: UITextField) -> Bool {
    var searchNav = SearchNavigationController()
    self.dismissViewControllerAnimated(true, completion: {searchNav.goToNextView()})
    return true
}

Inside SearchNavigationController:

func goToNextView() {
    performSegueWithIdentifier("searchNavigationToNextView", sender: self)
}

The issue is that when I hit return, I get this error:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Receiver () has no segue with identifier 'searchNavigationToNextView''

The segue is present in my storyboard, going from the UINavigationController to the next view.

EDIT: tried this, where _sender is declared in SingleSearchViewcontroller as var _sender = self and it did not work.

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "searchNavigationToSingleSearch" {
            let singleVC = segue.destinationViewController as! SingleSearchViewController

            singleVC._sender = self
        }
    }

回答1:

Update your code as,

func textFieldShouldReturn(textField: UITextField) -> Bool {
    var searchNav = SearchNavigationController()
    self.dismissViewControllerAnimated(true, completion: {self.presentingViewController.goToNextView()})
    return true
}

回答2:

I had the same issue that mattgabor had, and i tried Ashish's solution but it didn't work for me.

The problem i had in my code was that inside the completion block of "dismissViewControllerAnimated()", the propery "self.presentingViewController" was already nil when i wanted to call the method from my previous viewController that performed the push (the method "goToNextView()" in this example)

So my solution was just to create a variable to hold the previous viewController before calling "dismissViewControllerAnimated()". Using the current example, it would look like this:

    func textFieldShouldReturn(textField: UITextField) -> Bool {
    if let searchNav = self.presentingViewController as? SearchNavigationController {
        self.dismissViewControllerAnimated(true) {
            searchNav.goToNextView()
        }
    }
    return true
 }

来源：https://stackoverflow.com/questions/31715631/how-can-i-dismiss-a-modal-segue-then-perform-push-segue-to-new-view-controller

标签

ios

swift

uiviewcontroller

uinavigationcontroller

segue