I'm trying to segue into a 'settings' View Controller by clicking a button, and I'm assembling it via code but don't know what I'm doing wrong.
This is my button code:
#IBAction func settingsButton(_ sender: UIButton) {
self.performSegue(withIdentifier: "SettingsViewController", sender: self)
}
The View Controller is called 'Settings View Controller' (unsurprisingly). The app crashes whenever I press on it in my Simulator.
It'll probably be a simple thing, but any ideas what I'm doing wrong?
You must set your segue identifier whatever you want (for your question = SettingsViewController) from storyboard :
Hope it helps...
Related
I wanted to just go back to my previous page
from Attendance in going to Leave and Leave back to Attendance
LeaveViewController.swift
#IBAction func LeaveAttendanceSequeConnect(_ sender: Any) {
performSegue(withIdentifier: "LeaveAttendanceSegue", sender: nil)
}
Attendance.swift
#IBAction func LeaveUnwindSeque(segue: UIStoryboardSegue){
}
and then on my Leave Scene
I have ctrl drag to Exit
Pressing the Back button in Leave wont go back to Attendance
The segue should work without needing another segue to leave the unwind. Try this:
1) Keep your original LeaveAttendanceSequeConnect (which should have been bound with ctrl drag from your view controller in story board over to your corresponding .swift file).
2)Get rid of the LeaveUnwindSeque code and unbind that rewind segue properly by deleting the segue (p.s. is segue with a "g" not seque). Now click on the segue connection of the LeaveAttendanceSequeConnect in the storyboard. Make sure the original navigation controller has attributes and looks the same on the storyboard like figures A) and then make sure your second segue has attributes/storyboard like figure B).
A attribute:
B attribute:
B storyboard:
A: storyboard:
The signature of the unwind is incorrect.
#IBAction func LeaveUnwindSeque(segue: UIStoryboardSegue){
}
replace with
#IBAction func LeaveUnwindSeque(_ segue: UIStoryboardSegue){
}
I just want to perform segue with a back button on top.
#IBAction func onFirst(_ sender: UIButton) {
performSegue(withIdentifier: "firstSegue", sender: self)
}
#IBAction func onSecond(_ sender: UIButton) {
performSegue(withIdentifier: "secondSegue", sender: self)
}
Let's say you have two view controllers, ViewControllerOne and ViewControllerTwo.
You could do that programmatically or using storyboards.
Since you seem to be using #IBOutlet I will assume you want to do it using storyboards.
First open up your Main.storyboard and make sure that ViewControllerOne (the controller you want to segue from) is embedded in a Navigation Controller.
If it's not, you can do that by clicking on your View Controller, then click on Editor in the top menu bar, go to Embed In and select Navigation Controller.
Then you can create a segue using the Interface Builder by doing control + click on the little yellow icon at the top of ViewControllerOne (not the Navigation Controller) & drag to ViewControllerTwo in the Interface Builder.
Now click on the segue that just got created, and type an identifier of your choice in the Attributes Inspector.
Then in your ViewControllerOne class, you can just perform the segue using the #IBOutlet as you mentioned :
#IBAction func onFirst(_ sender: UIButton) {
performSegue(withIdentifier: "your_segue_identifier", sender: self)
}
Just make sure that the segue identifiers match, and everything should be fine :)
You need redefine target and action for your current navigation item
self.navigationItem.leftBarButtonItem?.target = self
self.navigationItem.leftBarButtonItem?.action = #selector(self.onFirst(_:))
Here is a picture of my storyboard:
I assume the problem is because the segue is coming from a custom table view cell. The button will send information based on the cell selected. When I press the button, I just perform the segue with identifier. Unfortunately, the navigation bar does not appear, and I can't imagine why its not appearing.
Any help is greatly appreciated!
EDIT: Here is the storyboard segue. It is push:
EDIT2: Here is the code I am using to perform this segue:
func buttonAction(sender: UIButton!) {
segueIndex = sender.tag
performSegue(withIdentifier: "segue_show_job", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "segue_show_job" {
let nextVC = segue.destination as! PlaceBidTableViewController
nextVC.job_info.job_info = self.job_arr_arr.job_info_arr_arr[segueIndex]
}
}
ANSWER:
Maximo and XCoder, thank you for your help. Even though my segue was push, something must have been corrupted. I deleted the segue and re-created it and it worked! Thanks!
Make sure use Push in your view. This is what suppose to be.
This make your navigation bar not show up.
Maximo and XCoder, thank you for your help. Even though my segue was push, something must have been corrupted. I deleted the segue and re-created it and it worked! Thanks!
I have a navigation tableview controller Calculator and that goes to AddActiveIngredients which is where I add everything in for the calculator.
I have the segue method backButton in Calculator and in AddActiveIngredients I have click dragged the segue from the controller to exit and selected the segue in the Calculator class.
The segue identifier is also backButton but it's not doing anything.
I've tried this code to try and trigger the segue manually but that's not working. Am I missing something so simple?
override func didMoveToParentViewController(parent: UIViewController?) {
if (!(parent?.isEqual(self.parentViewController) ?? false)) {
print("Back Button Pressed!")
self.performSegueWithIdentifier("backButton", sender: self)
}
}
It sounds like you just want to remove the AddActiveIngredients from the stack. If so, you just need to call a function to dismiss it.
func dismissVC() {
dismissViewControllerAnimated(true, completion: nil)
}
You can put that in a button tap or something else. It'll work with Show and Modal segues. Unwinding may be overkill for what you're doing.
Hope it helps!
To use the Exit icon you need not create a segue at all.
All you have to do is add a method in the ViewController to which you want to unwind to and add a method with the signature:
#IBAction func myUnwindAction(segue: UIStoryboardSegue) {
// do stuff
}
Remember, you have to add this method in the target ViewController
When you Control-Drag from a button to the Exit icon, this method will now show up.
When you now click the button, the current ViewController will be popped and the action method in the target will be called.
Hope this helps.
with Swift 5 you can use Dismiss function
#IBAction func dismissViewController(_ sender: Any) {
//Go back to previous controller
dismiss(animated: true, completion: nil)
}
I have a navigation controller, with a table view. When I press a cell, the detail view controller opens.
In my root view controller I have :
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "detailview" {
var destination:DetailViewController = segue.destinationViewController as DetailViewController
destination.delegate=self
}
}
In my detail view controller I have a back button :
#IBAction func back() {
self.navigationController?.popViewControllerAnimated(true)
}
The issue is, after 2 go to and return, my app crashes when I go back on the root view controller pressing back button. The console doesn't give me errors. It just crashes.
I think I have forgotten to unwind the segue.
So in my detail view controller I added :
#IBAction func unwindToViewController(segue: UIStoryboardSegue) {
println("unwind function")
}
I connect this function to my back button with "exit" in my storyboard.
When I run my app, If I press on the back button, the console doesn't display my print "unwind function", so unwindToViewController isn't called. Why ?
And my app still crashes...
Your unwindToViewController method should be placed in your root viewController, then ctrl-drag from the button in the detailViewController to the Exit icon in InterfaceBuilder. Choose that method in the popup menu.
Another approach would be to declare a protocol with a function in the rootViewController that is called from the detailViewController. You already set the rootViewController as the delegate of the detailViewController. Within that function you call dismissViewController.
Swift answer...
I had a similar problem.
The func: "segueForUnwindingToViewController(toViewController: UIViewController, fromViewController: UIViewController, identifier: String?) -> UIStoryboardSegue" was never called.
Solution:
since I didn't have a "UINavigationController", because I simply embeded the app in a Navigation Controller, I created a UINavigationController subclass for the Navigation Controller and added the function named above on it. Now the app calls "segueForUnwindingToViewController"