I have a set of view controllers linked to a tab controller.
When a image is selected on one of these tabbed views a segue is executed and a detail viewocntroller not linked to the tab controlled is opened.
Pronblem is when I navigate back to the tabbed view controller via segue from the detail view, the tabs are no longer visible.
Before segue executed on tabbed vc:
Same vc with no tab after segue from vc not linked to tab controller
Question is how to ensure tab will be visible on vc when called via the non tabbed vc?
Just to add the tabbed view connected to tab controller is a collection view, the detail view segue is excited when user sects an image:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
println(segue.identifier)
println(sender)
println("SEGUE SELECTED: \(segue.identifier)");
if(segue.identifier == "segueToDetailScrollView"){
// pass the cell
let cell = sender as CollectionViewCell;
let indexPath = collectionView?.indexPathForCell(cell);
let vc = segue.destinationViewController as ScrollView;
var image = arrayOfIUmages[indexPath!.row];
var imageTitle = titles[indexPath!.row];
println("Image to segue name : \(image) and the title : \(imageTitle)");
println("The vew controller \(vc)");
vc.currImage = UIImage(named: arrayOfIUmages[indexPath!.row]);
vc.textHeading = self.titles[indexPath!.row];
}
}
You will need to create a segue to the tabcontroller and let tab controllers set the inner view. Onload you can check for a shared default or something similar to find which tab should be shown.
Need to use unwind method in target view controller to allow navigation back to the same instance navigated from, good example here http://www.raywenderlich.com/81880/storyboards-tutorial-swift-part-2
Related
In my iOS app, in a viewController I try to open a specific view in Tab Bar Controller.
I use a performSegue.
First I try to navigate straight to the specific view , but in this case the tab bar disappear
So I try to navigate to the tabViewController, and this lead me to the defult view (the first)
any idea how to navigate to a specific view in TabBarController ?
the performSegue I use:
self.performSegue(withIdentifier: "goToMain", sender: self)
//"goToMain" is my indentipier to the storyboard Segue
I use swift 4
with this code, you don't need segues, you can use when you push some button
let VC1 = self.storyboard!.instantiateViewController(withIdentifier: "tabBarController") as! tabBarLoginViewController
VC1.selectedIndex = 2 //this line says that the view that appears will be third of you tab bar controller
self.navigationController!.pushViewController(VC1, animated: true)
if you want to use segue use this, the segue needs to point of tab bar controller, not a view of tab bar controller
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
if (segue.identifier == "goToMain") {
let vc = segue.destination as! TabBarController
vc.selectedIndex = 2
}
}
I have a Main VC which has a connection to Tab Bar Controller via segue and that Tab Bar controller has 2 sections and those are 2 ViewControllers. I need to pass data from Main VC to that specific VC which derived from Tab Bar Controller using segue. Since i am able to use only one segue (to show only TBController), is there any way to achieve to pass data directly from main to another by skipping Tab Bar controller?
Ps. Those 2 VC have a navigation controller connection between Tab Bar Controller and themselves as well.
Try This
var secondTab = self.tabBarController?.viewControllers[1] as SecondViewController
secondTab.array = firstArray
On prepare for segue function you can get the tabBar associated controllers via TabBarControllers property viewControllers - that let you select one of a tab bar controller's view controllers to become the active view controller. then you use tabBarController's property selectedIndex to actually segue to that VC.
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let index = 0//the index of the tab you wish to segue to
if let bar = segue.destination as? TabBarVC {
if let nav = bar.viewControllers[index] as? UINavigationController {
if let navChildVC = navigationController.viewControllers[0] as? YourVCType { // index of the controller of enumerate to find it
// pass data to navChildVC
bar.selectedIndex = index
}
}
}
}
I have a screen with a navigation controller and it has a button on the nav bar which displays a table (from another view controller) to select things from using pop over presentation, now on clicking any of those items i want to open another view controller a different screen.
BUT if i use navigationController?.pushViewController(tab, animated: true)
the new view controller is displayed within that small pop view itself
and if i use
navigationController?.presentViewController(tab, animated: true)
the navigation bar isn't there on that screen and i cannot go back to the previous screen. How to do it in such a way that i can go back to the screen which first displayed the pop Up list.
If you are using a Storyboard, it's really easy to do. If you're not, then you should. It's very good to use a Storyboard.
Let's call your view controllers these names:
The view controller that can show the popover is called SourceVC
The popover controller is called PopoverVC
The view controller to show when the user selects something from the table view is called NewVC
Add a show segue connecting your SourceVC to your NewVC. Give the segue an identifier.
Add an unwind segue that unwinds from PopoverVC to SourceVC. First, add these methods in your SourceVC:
func unwind(segue: UIStoryboardSegue) {
if let vc = segue.sourceViewController as? PopoverVC {
// get the thing that the user selected and store it somewhere
// perform a segue that shows NewVC
}
}
override func prepareForSegue(segue: UIStoryboardSegue) {
if let vc = segue.destinationViewController as? NewVC {
// pass the thing that the user selected to the NewVC
}
}
Then, select the PopoverVC and control drag it to the "Exit" thingy in SourceVC. And select "unwind:". Give this unwind segue an identifier as well.
When the user selects a row in the table view, just perform the unwind segue and store the thing that the user selected in a class-level variable so that you can pass it to SourceVC.
I have two view controllers and a Navigation contoller in a storyboard. In the first view controller I have two buttons.
Both buttons segue to the second view which contains a map and opens the map with different info. They are both of the kind show.
The first button when clicked opens the map with the navigation bar at the top (it loads from the side).
The second button loads the map without the navigation bar (it loads from the bottom).
I want both buttons to load the map with the navigation bar.
I am using xcode 7.3 swift and storyboards
Also using prepare for segue
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if(segue.identifier == "lav"){
let DestViewController = segue.destinationViewController as! MapView
DestViewController.type = typeLav
}
if(segue.identifier == "cam"){
let DestViewController = segue.destinationViewController as! MapView
DestViewController.type = typeCam
}
}
Set the segue action
Present Modally
Show Up from bottom, and without navigation controller, so there is no navbar too.
Push
Push the view controller to current navigation stack, so the navigation bar is shown
btw, method prepareForSegue was used to setup data transfered between view controllers;
I just ported my project over to Swift 2, and everything is working great - except that even the most simple segues have no back button. Here is the prepare for segue function that I am using:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
if segue.identifier == "showExercise" {
if let nav = segue.destinationViewController as? UINavigationController {
if let exercisesController = nav.topViewController as? ExercisesController {
let cell = sender as! WorkoutCell
if let workout = cell.name!.text {
exercisesController.exercises = Workouts[workout]!
exercisesController.navigationItem.title = workout
}
}
}
}
}
Before, the back button to the parent segue used to automatically populate. Now, all I get is the title in the child navigation vc
Are you using show or show detail segue? It seems like you are using a modal segue. Destination view controller for show or show segue is usually the second view controller itself, and not embedded in another UINavigationController.
If your destination view controller for the show segue is really a UINavigationController, the new navigation controller's navigation bar settings may override the old one (the navigation controller of the source view controller). Try not embedding your destination view controller in another UINavigationController.