Swift Performseguewithidentifier Not Working

Swift performSegueWithIdentifier not working

[Assuming that your code is not crashing, but rather just failing to segue]

At least one problem is:

self.performSegueWithIdentifier("Test", sender: self)

should be:

dispatch_async(dispatch_get_main_queue()) {
    [unowned self] in
    self.performSegueWithIdentifier("Test", sender: self)
}

Remember that all UI operations must be performed on the main thread's queue. You can prove to yourself you're on the wrong thread by checking:

NSThread.isMainThread() // is going to be false in the PF completion handler

ADDENDUM

If there's any chance self might become nil, such as getting dismissed or otherwise deallocated because it's not needed, you should capture self weakly as [weak self] not unowned, and use safe unwrapping: if let s = self { s.doStuff() } or optional chaining: self?.doStuff(...)

ADDENDUM 2

This seems to be a popular answer so it's important to mention this newer alternative here:

NSOperationQueue.mainQueue().addOperationWithBlock {
     [weak self] in
     self?.performSegueWithIdentifier("Test", sender: self)
}

Note, from https://www.raywenderlich.com/76341/use-nsoperation-nsoperationqueue-swift:

NSOperation vs. Grand Central Dispatch (GCD)

GCD [dispatch_* calls] is a lightweight way to represent units of work that are going to be executed concurrently.

NSOperation adds a little extra overhead compared to GCD, but you can add dependency among various operations and re-use, cancel or suspend them.

ADDENDUM 3

Apple hides the single-threaded rule here:

NOTE

For the most part, use UIKit classes only from your app’s main thread.
This is particularly true for classes derived from UIResponder or that
involve manipulating your app’s user interface in any way.

SWIFT 4

DispatchQueue.main.async(){
   self.performSegue(withIdentifier: "Test", sender: self)
}

Reference:

https://developer.apple.com/documentation/uikit

performSegueWithIdentifier not working if called from viewDidLoad

EXPLANATION:

Your View hasn't appeared yet when you call your checkStoredUser().

EASY FIX:

Put it in viewDidAppear() like this:

override func viewDidAppear(animated:Bool) {
    super.viewDidAppear(false)
    checkStoredUser()
}

performSegueWithIdentifier Not Working - Swift

That's because you can't push view controller without UINavigationController. Please put UINavigationController or please set segue Kind "Modal" not "Push"

Swift segue not working?

Generally, any UI updating has to be in main thread. I think the block for PFFacebookUtils.logInInBackgroundWithAccessToken is still in the background state in above situation. Maybe trigger the showViewController in dispatch_async(dispatch_get_main_queue(), {}) and see if there is any difference.

dispatch_async(dispatch_get_main_queue(), {
    let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
    let vc = storyboard.instantiateViewControllerWithIdentifier("SignUpViewController")
    self.showViewController(vc, sender: self)
})

Storyboard performSegueWithIdentifier not working

EDIT

I noticed you have a segue going the wrong way from your brandButton. Connect you segue from your brandButton and drag to your VC, not from your VC to your brandButton.

RE-EDIT

You don't appear to have anything that will deliver a response to call the code correctly; A button. If you did, you would not have to code anything to demand a transition back, because the segue would automatically perform.

Try embedding your TableViewController in a UINavigationController by selecting your TableView --> Select from the Menu at the top of screen Editor --> Select Embed In --> Select NavigationController.

This way you won;t have to worry about coding a transition back, you will have the option to return built in.

Otherwise, continue with code below.

THEN

Either try:

//note YOU HAVE NOT INCLUDED .storyboard
// Get the storyboard from the main bundle - check the name to confirm:
NSString * storyboardName = @"Main";
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
[storyboard performSegueWithIdentifier:@"imagePreviewVCtoBrandSearchVC" sender:self];

OR Try presenting the view controller. Name your view you wish to change to - Select your second view. Then select the StoryBoard editor and name your selected VC:

Then code your button to change views like so:

NSString * storyboardName = @"Main";
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:@"secondViewController"];

[self presentViewController:vc animated:YES completion:nil];

//animated can be NO

Swift: performSegueWithIdentifier during unwind not working

In VC1 you need a function:

@IBAction func unwindToVC1(segue:UIStoryboardSegue) {
}

Then in your storyboard ctrl drag from the yellow view controller icon to the Exit icon and select unwindToVC1: from the pop up

Give the unwind segue an identifier, say unwindToVC1

Now, in VC2, create your button touchUpInside handler:

func buttonTapped(sender:UIButton) {
    self.performSegueWithIdentifier("unwindToVC1")
}

when you set up your button programatically, add this method as the action handler:

button.addTarget(self, action: "buttonTapped:", forControlEvents: .TouchUpInside)

performSegueWithIdentifier not showing view controller as expected

Try to add:

super.performSegueWithIdentifier(identifier, sender: sender)

In your performSegueWithIdentifier method.

PerformSegueWithIdentifier not working Swift

You should use didSelectRowAtIndexPath instead of didDeselectRowAtIndexPath. The latest is often propose first when using autocompletion, it's easy to make the mistake.

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