I'm trying to create a walkthrough(intro) for my app. I am using BWWalkthrough to do it. If want to open this view controller after clicked a button, it works(as you can see in below codes). But I don't want to do this. I want to open this view controller after launch screen loaded.
When I clicked "is initial View Controller" for the master page and added below code in viewDidLoad method, I can see only master page but I can't see view controllers(page_one, page_two ...) attached to master page. Probably I must write some codes in AppDelegate but I don't know how is it
How can I solve this problem?
#IBAction func testButton(_ sender: Any) {
let goStoryboard = UIStoryboard(name: "Main", bundle: nil)
let walkthrough = goStoryboard.instantiateViewController(withIdentifier: "master") as! BWWalkthroughViewController
let page_one = goStoryboard.instantiateViewController(withIdentifier: "page1") as UIViewController
let page_two = goStoryboard.instantiateViewController(withIdentifier: "page2")as UIViewController
let page_three = goStoryboard.instantiateViewController(withIdentifier: "page3")as UIViewController
**// Attach the pages to the master**
walkthrough.delegate = self
walkthrough.add(viewController:page_one)
walkthrough.add(viewController:page_two)
walkthrough.add(viewController:page_three)
self.present(walkthrough, animated: true, completion: nil)
}
First of all, go to your Main storyboard and create a new view controller. You should also create a view controller class. This is going to be your Home screen storyboard and you're going to set it as your Initial View Controller.
In the class that you previously created, you can put this:
class HomeViewController: UIViewController {
override viewDidLoad(){
super.viewDidLoad()
let goStoryboard = UIStoryboard(name: "Main", bundle: nil)
let walkthrough = goStoryboard.instantiateViewController(withIdentifier: "master") as! BWWalkthroughViewController
let page_one = goStoryboard.instantiateViewController(withIdentifier: "page1") as UIViewController
let page_two = goStoryboard.instantiateViewController(withIdentifier: "page2")as UIViewController
let page_three = goStoryboard.instantiateViewController(withIdentifier: "page3")as UIViewController
// Attach the pages to the master
walkthrough.delegate = self
walkthrough.add(viewController:page_one)
walkthrough.add(viewController:page_two)
walkthrough.add(viewController:page_three)
self.present(walkthrough, animated: true, completion: nil)
}
}
Related
I created a view in .xib. On it, I placed a button on which I want to open another ViewController. I assigned a storyboardID to this ViewController. But I can't push the new controller, how can this problem be solved?
My code:
class MyView: UIView {
...
#IBAction func buttonPressed(_ sender: Any) {
let storyboard = UIStoryboard.init(name: "ViewController", bundle: Bundle.init())
let vc = storyboard.instantiateViewController(withIdentifier: "VC") as! ViewController
let navigationController = UINavigationController.init()
navigationController.pushViewController(vc, animated: true)
}
...
}
class ViewController: UIViewController {
...
}
Xcode gives this error:
'Could not find a storyboard named' ViewController'
but I checked there are no errors. I reloaded Xcode - no result.
Seems you have more than one issue.
You are trying to push a UIViewController into a non presented UINavigationController
You are creating an instance from a UIStoryboard with wrong identifier
First you need to choose the correct UIStoryboard which I am assuming it's main, then you have to present the UINavigationController from the holder UIViewController or trying to push from that UIViewController if it's has a UINavigationController,
Part 1: Fixing the instances,
let storyboard = UIStoryboard.init(name: "main", bundle: Bundle())
let vc = storyboard.instantiateViewController(withIdentifier: "VC") as! ViewController
let navigationController = UINavigationController(rootViewController: vc)
Now you have a navigationController that holds a your VC
Part 2: You want to present this navigation from your holding VC you can either add a listener to the UIButton from that VC and present/push from there
so lets wrap this up create a function in your VC that holds the UIView
#objc func pushToMyVc() {
let storyboard = UIStoryboard.init(name: "main", bundle: Bundle())
let vc = storyboard.instantiateViewController(withIdentifier: "VC") as! ViewController
let navigationController = UINavigationController(rootViewController: vc)
}
And in your UIView add this variable var selector: (() -> Void)?
Now in #IBAction func buttonPressed call this function selector?()
Now all we need is to pass what function I want to use when this button gets clicked in our case the function pushToMyVC that we put in our main UIViewController so in our didLoad or wherever you're calling this custom view
set the selector like this
myView.selector = pushtoMyVC
Side Note: you can't present/push UIViewController from non
UIViewController classes
Try changing how you fetch the storyboard from
let storyboard = UIStoryboard.init(name: "ViewController", bundle: Bundle.init())
to
let storyboard = UIStoryboard(name: "ViewController", bundle: nil)
note that the storyboard ID needs to be exactly ViewController.
If this still shows the same error, I'd say you have an issue with the storyboard target membership, so check that in the file inspector on the right side of the Xcode editor.
You should check your Storyboard file name again, because when you want to initiate a UIViewController from a Storyboard file, the name parameter in UIStoryboard initiation has to be exactly the same as the Storyboard file name.
#IBAction func buttonPressed(_ sender: Any) {
// Let's say that you have a Storyboard file named ViewController.storyboard and a UIViewController class named ViewController.swift
let destinationVC = UIStoryboard(name: "ViewController", bundle: nil).instantiateViewController(withIdentifier: "VC") as! ViewController
self.navigationController?.pushViewController(destinationVC, animated: true)
}
Hope this helps your issue
you should take a delegate back to viewController that contains current view, and call navigationController.push from there
I have a design made in nib and in round about all ViewControllers I am loading that nib design.
Now as that was common footer so I managed to used it in the footer of all other view controllers.
Now what I want : I want that whenever User click on a footer it must start a new View Controller that will show what you can say "About us " view controller.
What I am doing:
// ON CLICK OF FOOTER I AM DOING
let mAboutUs = self.storyboard?.instantiateViewController(withIdentifier: "idAboutUs") as! AboutUs
mAboutUs.modalPresentationStyle = .fullScreen
self.present(mAboutUs, animated: true) {
}
but I am getting following error
Value of type 'FooterView' has no member 'storyboard'
My Understanding: I think from nib file we can not start a new ViewController, But I really do not want to do this thing in all other View controllers in which I added this nib (FooterView) as my footer view at bottom of each view controller.
Please help me!!!!
A UIView subclass doesn't contain a storyboard property it's for a vc subclass , You need
let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "idAboutUs") as! AboutUs
if you want to present a vc from inisde the view FooterView then add a delegate like
weak var delegate:VCName?
When you create an instance
let ins = FooterView() // or from storyboard
ins.delegate = self
Then use
delegate?.present(mAboutUs, animated: true)
inside the view's class
You can use a delegate that all vcs conforms to but the easiest is to add this extension
extension UIViewController {
func topMostViewController() -> UIViewController {
if let presented = self.presentedViewController {
return presented.topMostViewController()
}
if let navigation = self as? UINavigationController {
return navigation.visibleViewController?.topMostViewController() ?? navigation
}
if let tab = self as? UITabBarController {
return tab.selectedViewController?.topMostViewController() ?? tab
}
return self
}
}
Then
guard let currentVC = (UIApplication.shared.delegate as! AppDelegate).window?.rootViewController.topMostViewController() else { return }
currentVC.present(mAboutUs, animated: true)
Your code should look similar to this:
let vc = UIStoryboard(name: "<Name of the storyboard that contains the About Us VC>", bundle: nil).instantiateViewController(withIdentifier: "idAboutUs") as! AboutUs
self.present(vc, animated: true) {
}
I created a storyboard. The first screen is Launch screen(custom UIViewController called LaunchViewController) and the next screen is custom UITabBarController called SampleTabViewController.
I want to have it automatically go to the SampleTabViewController after 2 seconds on the LaunchViewController.
But some samples that I have found is only from the custom UIViewController to custom UIViewController.
I already set 'sampleTabViewController' on screen associated with "SampleTabViewController" on the storyboard.
Here is my code.
class LaunchViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
print("LaunchViewController is initialized");
let time = dispatch_time(dispatch_time_t(DISPATCH_TIME_NOW), 2 * Int64(NSEC_PER_SEC))
dispatch_after(time, dispatch_get_main_queue()) {
// Put your code which should be executed with a delay here
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let controller = storyboard.instantiateViewControllerWithIdentifier("sampleTabViewController")
self.navigationController.pushViewController(controller, animated: true)
}
}
I tried "self.presentViewController(CareGiverViewController(), animated: true, completion: nil)". It works, but the next screen is blank.
I just started learning iOS app with Swift.
Thanks.
Try to set TabbarViewController as rootViewController .
Replace with your push ViewController lines :
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let controller = mainStoryboard.instantiateViewController(withIdentifier: "sampleTabViewController") as! UITabBarController
UIApplication.shared.keyWindow?.rootViewController = controller
My goal is whenever i click a button on a first view controller, then it will navigate to another controller which is a navigation controller.
firstViewController and secondViewController has no connection or anything.
Picture
I used this code
#IBAction func buttonTapped(sender: UIButton) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("secondViewCtrl") as! SecondViewController
self.presentViewController(vc, animated: true, completion: nil)
}
The reason why i instatiate so that I could pass data like
vc.name = "Myname"
The problem with this code is that it doesn't present navigation bar and as well as the tab bar. What should I do to show both?
Updated question
#IBAction func buttonTapped(sender: UIButton) {
guard let tabBarController = tabBarController else { return }
tabBarController.selectedIndex = 1
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("trackYourGenie") as! TrackYourGenieViewController
let navController = tabBarController.viewControllers![1]
let secondViewController = navController.topViewController
vc.name = "Myname"
}
You are instantiating the view controller hence you wouldn't get the navigation bar. To get the navigation bar please instantiate navigation controller and since the second view is only child you would get the second view by default.
#IBAction func buttonTapped(sender: UIButton) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("Navigation Controller Id") as! UINavigationController
self.presentViewController(vc, animated: true, completion: nil)
}
The above code should give you the navigation bar.
A safe approach:
guard let tabBarController = tabBarController else { return }
tabBarController.selectedIndex = 1
If you need to access to your tabBarController to pass datas you can do simply:
let navController = tabBarController.viewControllers[1]! as! UINavigationController
let secondViewController = navController.topViewController
Your method could be:
#IBAction func buttonTapped(sender: UIButton) {
guard let tabBarController = tabBarController else { return }
let navController = tabBarController.viewControllers[1]! as! UINavigationController
let secondViewController = navController.topViewController as! SecondViewController
secondViewController.name = "my name"
tabBarController.selectedIndex = 1
}
In your case, the following code should be sufficient :
self.tabBarController.selectedIndex = 1
As UITabBarController is your rootViewController, you can access it with self.tabBarController. You don't have to instantiate UINavigationController as it is in the storyboard.
I can see from your StoryBoard that you have a TabBarController. If your configuration is that and FirstViewController is on first tab and SecondViewController on second tab, you can just change TabBarController selectedIndex property:
#IBAction func buttonTapped(sender: UIButton) {
tabBarController?.selectedIndex = 1
}
If you want to pass data to SecondViewController you can try one of these solutions:
let controller = tabBarController.viewControllers[1] as SecondViewController!
controller.data = "some data"
This soultion could not work since SecondViewController is not ready yet.
Create a singleton class where to save data, then retrieve data in SecondViewController viewDidLoad method
Save data in UserDefaults, then retrieve data in SecondViewController viewDidLoad method (bad solution if information doesn't have to be persistent)
Extend UITabBarController and use it, create a custom var in tabBarController, put data in that variable and then retrieve data in SecondViewController viewDidLoad method
Then clear data if needed.
Navigation will not work from firstViewController as to navigate something we need UINavigationController.
Try Like This
let customerStoryboard = UIStoryboard(name: "Customer", bundle: nil) //First(Current) storyboard
let agentStoryboard = UIStoryboard(name: "Agent", bundle: nil) //Second storyboard
var otherVC = UIViewController! // ViewController reference
otherVC = agentStoryboard.instantiateViewControllerWithIdentifier("AgentProfile")
The last statement is not executing or showing results, is anything else required to do other than this?
You only instantiate view controller. To present it you should use presentViewController method
someVC.presentViewController(otherVC, animated: true, completion: nil)
Use this code to show the second view controller.
let otherVC : AnyObject! = self.agentStoryboard.instantiateViewControllerWithIdentifier("AgentProfile")
self.showViewController(otherVC as UIViewController, sender: otherVC)
let secondViewController = self.storyboard.instantiateViewControllerWithIdentifier("SecondViewController") as SecondViewController
self.navigationController.pushViewController(secondViewController, animated: true)