I need to show a custom tableview in 1 side and the detail in other in ipad like with splitview controller. And so, the detail is visible after a selection of a button on the cell.
My problem comes from the displaying of the detail controller. I sent data from the button in tableview to container controller via a delegate method
let containerController = self.storyboard?.instantiateViewController(withIdentifier: "ContainerController") as! ContainerViewController
containerController.reactionViewControllerResponse(selectedMechanism: selectedMechanism)
self.navigationController?.pushViewController(containerController, animated: true)
and in the container, I create the detail controller via
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
if (selectedMechanism != "" && self.mechanismViewController != nil){
self.mechanismViewController = self.storyboard?.instantiateViewController(withIdentifier: "MechanismController") as! MechanismViewController?
self.mechanismViewController?.selectedMechanism = selectedMechanism
self.addChildViewController(mechanismViewController!)
mechanismViewController?.view.frame = CGRect(x: self.containerView.frame.size.width/2, y: 0, width: self.containerView.frame.size.width/2, height: self.containerView.frame.size.height)
self.containerView.addSubview((mechanismViewController?.view)!)
mechanismViewController?.didMove(toParentViewController: self)
}
}
but due to this line in the tableview controller
self.navigationController?.pushViewController(containerController, animated: true)
the detail controller is not shown in the same container controller, but in another one. I tried several things, but either nothing appears or in a different container.
Please help me!!!
P.S.: I don't use splitview controller since I don't need it as inital view controller, and I've already tried and had problems to display only the master on the whole screen, customize the tableview cell....
Problem solved, the delegate was badly instantiated.
Thanks to me :)
Related
I want to present two view controllers in a row, without seeing the first one.
I want to be able to return from the second one to the first.
I have read this post, but the responses focus on using the navigation controller, while I want to present the second view controller modally.
The use case is: My initial VC check if the user is logged in, and presents the login VC if not.
If yes, it displays the main VC.
On logout, I should be able to unwind to the login VC.
A suitable solution would be presenting the second view controller first and only presenting the first one after the second one fully appeared.
InitialViewController
let secondVc = storyboard!.instantiateViewController(withIdentifier: "Second") as! SecondViewController
secondVc.initialVc = self
present(secondVc, animated: true)
SecondViewController
fileprivate var firstViewDidAppearTime = true
var initialVc: InitialViewController!
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if firstViewDidAppearTime {
firstViewDidAppearTime = false
let firstVc = storyboard!.instantiateViewController(withIdentifier: "First")
initialVc.present(firstVc, animated: false)
}
}
First of, I am noob to Swift programming.
I am trying to show a custom view over a UITableView.
I am facing two major issues :
a) The subview does not appear correctly firstly. ref image below :
and after few moments actual view is loaded :
b) After the UITableView is scrolled, the view is not coming over the current top scroll position of UITableView
Following is the code to add subview :
let vaAdPopupViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "AdPopupWithCrossViewController") as! AdPopupWithCrossViewController
vaAdPopupViewController.adID = adID
vaAdPopupViewController.tableView = self.tableView
if let message = parseJSON["adv_text"] as? String{
vaAdPopupViewController.message = message
}
let navigationBarFrame: CGRect = (self.navigationController?.view.frame)!
let frameSize = CGRect(x: navigationBarFrame.minX, y: navigationBarFrame.minY, width: navigationBarFrame.width, height: (navigationBarFrame.height - (self.navigationController?.navigationBar.frame.size.height)!))
vaAdPopupViewController.view.frame = frameSize
self.tableView.addSubview(vaAdPopupViewController.view)
vaAdPopupViewController.view.tag = 1000
self.addChildViewController(vaAdPopupViewController)
vaAdPopupViewController.didMove(toParentViewController: self)
also in AdPopupWithCrossViewController :
override func viewDidLoad() {
self.view.superview?.layoutIfNeeded()
self.view.layoutIfNeeded()
super.viewDidLoad()
}
Please guide me how to resolve this issue.
Thank You.
You probably want to either create a Present Modally Segue or use present() via code.
You've already created your AdPopupWithCrossViewController. Set its background color to be translucent. Then you can present it like this:
let vaAdPopupViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "AdPopupWithCrossViewController") as! ModalOverTableViewController
vaAdPopupViewController.modalPresentationStyle = .overCurrentContext
self.present(vaAdPopupViewController, animated: true, completion: nil)
Then, your little "X" button can remove the ad with:
#IBAction func closeTapped(_ sender: Any) {
self.dismiss(animated: true, completion: nil)
}
You can try out the various options on .modalPresentationStyle and .modalTransitionStyle, as well as setting animated to true or false, to get the appearance / behavior you desire.
As Dan says, you should add your popup as a subview of the view controller's view, not of the table view. A Table view's view hierarchy is private and you should not be trying to mess with it.
Note that you can't do this with a table view controller. This has always bugged me, but it's a fact: A UITableViewController manages a single table view and nothing else. If you want a more complex view hierarchy you need to embed your table view controller in another view controller. I do this with a container view and an embed segue, which is very easy.
If you do that then you can add your new view controller's content to the parent view controller's content view, not to the table view controller's view (or to the table view itself)
In my App, I've created a new storyboard that serves as a very basic tutorial for how to use certain features. (Instructions.storyboard). This storyboard has it's own class - InstructionsVC.swift
I want to present InstructionsVC when MainVC loads within viewDidAppear.
It works great. Fires up on App load just like it's supposed to. The problem occurs when I press the [Close] button on the Instructions interface. It closes the VC, fades to the main screen, and then immediately fires the Instructions VC back up.
How can I prevent the Instructions VC from loading back up once it's closed?
func openInstructions() {
let storyboard = UIStoryboard(name: "Instructions", bundle: nil)
let instructionsView = storyboard.instantiateViewController(withIdentifier: "instructionsStoryboardID")
instructionsView.modalPresentationStyle = .fullScreen
instructionsView.modalTransitionStyle = .crossDissolve
self.present(instructionsView, animated: true, completion:nil)
}
override func viewDidAppear(_ animated: Bool) {
openInstructions()
}
And within my instructions class, I have the following action on the close button:
#IBAction func closeButtonPressed(_ sender: UIButton) {
let presentingViewController: UIViewController! = self.presentingViewController
presentingViewController.dismiss(animated: true, completion: nil)
}
Note - I'd rather not use UserDefaults to resolve this, because I'm going to be incorporating something similar in other parts of the App and don't want to resort to UserDefaults to achieve the desirable behavior.
Thanks in advance buddies!
viewWillAppear and viewDidAppear are called every time a view controller's content view becomes visible. That includes the first time it's rendered and when it's shown again after being covered by a modal or by another view controller being pushed on top of it in a navigation stack.
viewDidLoad is only called once when a view controller's content view has been loaded, but before it is displayed. Thus when viewDidLoad is called it may be too soon to invoke your second view controller.
You might want to add an instance variable hasBeenDisplayed to your view controller. In viewDidAppear, check hasBeenDisplayed. If it's false, display your second view controller and set hasBeenDisplayed to true.
I am learning iOS with few sample projects. I have two view controllers in that first VC has few buttons and a mapview and the second VC has tableview showing a set of results. I have embed the both viewcontrollers in navigationViewController.By clicking a button from First VC i am able to show the tableview (using show segue) and able to go back to first VC through navigation. Now my query is I want to display the tableview (second VC) in place of one view object (map view) defined in firstVC rather than padding the tableview entirely in full screen. My problem is when showing another Viewcontroller i still want to see the few viewobjects from firstVC so I am trying to display the secondVC on top of mapview when i click on a button which triggers the segue.I have to use the single interface, so I need to load the tablview results from SecondVC into firstVC by replacing mapView's view with tableview.Please let me know your ideas if it is possible and any other ideas to achieve the same are most welcomed.
Sreekanth Gundlapalli,
All you need to do is to add the TableView controller's view as subview to your view Controller. In order to simplify the process I personally prefer using the ContainerView,
Step 1 : Add a ContainerView to your View Controller and add the auto layout constraints to it, because your tableView will be loaded inside this container view you donate have to apply any auto layout constraint to your tableView to keep it in place :)
ex :
Step 2 : Drag an IBOutlet to the container view.lets call it as containerView :)
Step 3 : Now its up to you to have two view controller 1 for loading map and 1 for loading tableView, or you will have map view as your view controller subview and you will either hide it or remove it and add container view but I personally prefer having code clean n neat so I prefer having two different VCs
so lets create 2 VCs lets call them as viewController1 & viewController2 Savy ??
Step 4 :
lets write a method which actually loads VC and adds its view as subview to your ViewController
func changeEmbededVC(for status : Int) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
if status == 0 {
mehereButton.tag = 1
let vc = storyboard.instantiateViewController(withIdentifier: "viewController1")
vc.willMove(toParentViewController: self)
containerView.addSubview(vc.view)
self.addChildViewController(vc)
vc.didMove(toParentViewController: self)
}
else {
mehereButton.tag = 0
let vc = storyboard.instantiateViewController(withIdentifier: "viewController2")
vc.willMove(toParentViewController: self)
containerView.addSubview(vc.view)
self.addChildViewController(vc)
vc.didMove(toParentViewController: self)
}
}
I believe code is pretty self explanatory :D now what is mehereButton.tag = 1 ?? Simple you want to toggle view on button press don't you :D hence I have created a IBOutlet for mehereButton and changing its tag :)
now finally in IBAction of mehereButton
#IBAction func buttonTapped(_ sender: UIButton) {
self.changeEmbededVC(for: self.mehereButton.tag)
}
but we need to load one of the view by default isn't it :D
so change your viewDidAppear to
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
self.changeEmbededVC(for: 0)
}
Hope I answered your question In detail :P I know you can't neither up vote or accept answer as you don't have enough reputation :) but hope it will help somebody in future as well :)
I followed Ray Wenderlich tutorial on how to create an iOS book animation, now i'm trying to perform some changes to it.
Original project is composed of Navigation Controller, Books View Controller - showing an array of books, by clicking on a book you can open it - and Book View Controller - showing the selected book open.
What i've added: a View Controller and set it as initial VC; a UIButtonwhich perform a show segue to Navigation Controller.
I want to show View Controller in background after Books View Controller appears but apparently iOS removes the view controllers underneath it from the view hierarchy, this leading to a black background if i set clearColor in the Attributes inspector. I've then added the following code to ViewController.swift to have a transparent background.
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let vc = self.storyboard!.instantiateViewControllerWithIdentifier("BooksViewController") as! BooksViewController
vc.view.backgroundColor = UIColor.clearColor()
vc.modalPresentationStyle = UIModalPresentationStyle.OverCurrentContext
self.presentViewController(vc, animated: true, completion: nil)
}
It works well and i can see the initial VC in the background while seeing the array of books, but i can no longer perform segue to Book View Controller by clicking on a book. So apparently openBook in BooksViewController is never called:
func selectedCell() -> BookCoverCell? {
if let indexPath = collectionView?.indexPathForItemAtPoint(CGPointMake(collectionView!.contentOffset.x + collectionView!.bounds.width / 2, collectionView!.bounds.height / 2)) {
if let cell = collectionView?.cellForItemAtIndexPath(indexPath) as? BookCoverCell {
return cell
}
}
return nil
}
func openBook(book: Book?) {
let vc = storyboard?.instantiateViewControllerWithIdentifier("BookViewController") as! BookViewController
vc.book = selectedCell()?.book
dispatch_async(dispatch_get_main_queue(), { () -> Void in
self.navigationController?.pushViewController(vc, animated: true)
return
})
}
I cannot understand where the problem is, any help is really appreciated. Please be gentle, i'm still learning Swift and english is not my native language.
You are using prepareForSegue incorrectly. You do not want to present a view controller in your prepareForSegue. Use segue.destinationViewController as! YourViewController to reference it instead