All:
I am doing a swift , cocoa macos app project with multiple ViewControllers in one storyboard.
I know if I do segue and link the segue from second ViewController to first ViewController.
I can pop out ViewController.
But what if I have a function and want to call another ViewController to present programmatically from first ViewController?
I search a lot of examples start with UIStoryBoard, but my Storyboard is NSStoryboard.
Could anyone hint me a little to start with?
my code:
func checkPassword(SystemMsg:String) -> String{
//print("x")
let storyBoard = NSStoryboard(name: "Main", bundle: nil)
let mainViewController : NSViewController = storyBoard.instantiateController(withIdentifier: "PasswordInput") as! NSViewController
//self.present(mainViewController, asPopoverRelativeTo: <#T##NSRect#>, of: sender, preferredEdge: NSRectEdge, behavior: <#T##NSPopover.Behavior#>)
return ""
}
And my viewController in storyboard look like(no segue,no link):
enter image description here
If anyone can guide me through this step by step would be appreciated.
I figure it out myself.
The most simple way contains 4 steps:
Identify your main ViewController and second ViewController in storyboard
Create your main ViewController with instantiateController
Create your second ViewController with instantiateController
use presentAsModalWindow or presentAsSheet to present secondController on main ViewController
first we need to Identify storyboard correctly:
Identify first storyboard , we need to click top blue cube and then name it in Storyboard Id area
Identify second storyboard , we need to click top blue cube and then name it in Storyboard Id area
example code:
func checkPassword(SystemMsg:String) -> String{
//print("x")
//let storyBoard = NSStoryboard(name: "Main", bundle: nil)
let mainViewController : NSViewController = self.storyboard?.instantiateController(withIdentifier: "MainController") as! NSViewController
let passwordInputViewController : NSViewController = self.storyboard?.instantiateController(withIdentifier: "PasswordInput") as! NSViewController
mainViewController.presentAsModalWindow(passwordInputViewController)
//Or
mainViewController.presentAsSheet(passwordInputViewController)
return ""
}
If I miss something please correct me gently.
reference: Transitioning between view controller, OS X
PS. if you want to pass value between ViewController, this is good reference : https://learnappmaking.com/pass-data-between-view-controllers-swift-how-to/#back-properties
Related
I have a view controller that instantiates a new window controller.
I need to pass an object to that window controller's view controller.
Here is what I have so far:
let storyboard = NSStoryboard(name: "Main", bundle: nil)
if let windowController = storyboard.instantiateController(withIdentifier: "customerEditWindowController") as? NSWindowController
{
let viewController = windowController.contentViewController as! EditCustomerViewController
viewController.customer = customer // (An object)
windowController.window?.makeKeyAndOrderFront(self)
}
The window is displayed as expected and then Xcode traps into the debugger with the error:
Could not cast value of type 'NSViewController' (0x7fffd1dcc4e0) to
'Inventory2.EditCustomerViewController' (0x100011660).
I'm confused since my EditCustomerViewController extends NSViewController.
class EditCustomerViewController: NSViewController
1) Why can't NSViewController be cast to EditCustomerViewController?
2) Is there a better way to get data into the new view controller?
This is a simple shot in the dark but did you set the view controller’s class name in Interface Builder?
I'm attempting to switch storyboards when a button only if a condition (The textfield not being empty) is met. I found this piece of code as an answer to a similar question, and it doesn't seem to be working. My program crashes with "'Storyboard () doesn't contain a view controller with identifier 'Avatar Controller''"
I'm not completely sure as to where to find the view controller identifies, or whether or not I have to add '.storyboard' at the end of the storyboard name.
let storyboard = UIStoryboard(name: "Avatar", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "Avatar Controller")
self.navigationController!.pushViewController(vc, animated: true)
To make it works, Use Storyboard ID has to be checked
This could be happening for 2 reasons.
1) Because in your Avatar.storyboard you are referencing a view controller with the id Avatar Controller but you have not set that value on any of the view controllers in the storyboard file. Go into your Avatar.storyboard, click on the view controller you want to show and go to this panel:
Make sure that the Storyboard ID for your viewController matches what value you use in storyboard.instantiateViewController(withIdentifier: "Avatar Controller")
2) Because you are not providing a bundle when you are loading your storyboard. You are calling this
let storyboard = UIStoryboard(name: "Avatar", bundle: nil);
but because you specify bundle as nil it doesn't know where to look for the Avatar.storyboard file. To fix it, specify bundle as Bundle.main:
let storyboard = UIStoryboard(name: "Avatar", bundle: Bundle.main);
I'm having the hardest time finding an answer for this.
I have a xib view that is within a scrollview that is within a view controller. In the xib I have a button with an action and I need to segue to a view controller I have in my storyboard. I also would like to be able to use a custom segue.
So far, I have read that I can instantiate the viewcontroller from the storyboard to segue to it. But then I don't know how to present that controller.
thanks for any help...
UPDATE:
this is the code I'm using to perform the segue.
In parent ViewController:
static var referenceVC: UIViewController?
override func viewDidLoad() {
super.viewDidLoad()
print("viewdidload")
LevelSelectViewController.referenceVC = self
setupScrollView()
}
code in xib view file
let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "sightWordController")
let parent = LevelSelectViewController.referenceVC!
let segue = InFromRightCustomSegue(identifier: "test", source: parent, destination: vc)
segue.perform()
As noted in the comments, Segues are typically confined to storyboard usage as noted in the documentation. You can implement a custom xib view in a storyboard via #IBDesignable like approaches and have you're view load from the xib into the storyboard file/class. This way, you gain the benefits of both worlds. Otherwise, you may want to approach this in another fashion (such as delegates/target-action events, etc).
You may also climb the responder chain and call a segue related to the VC loaded from the storyboard (the segue doesn't necessarily have to be attached to any particular action) via getting a reference to the VC and calling the segue. You can climb the responder chain in a manner such as the example code below:
protocol ChildViewControllerContainer {
var parentViewController: UIViewController? { get }
}
protocol ViewControllerTraversable {
func viewController<T: UIViewController>() -> T?
}
extension UIView: ViewControllerTraversable {
func viewController<T: UIViewController>() -> T? {
var responder = next
while let currentResponder = responder {
guard responder is T else {
responder = currentResponder.next
continue
}
break
}
return responder as? T
}
}
extension UITableViewCell: ChildViewControllerContainer {
weak var parentViewController: UIViewController? {
return viewController() as UIViewController?
}
}
How do you create multiple storyboards in the same project using Swift? I know I have to go to File -> New -> File and then choose Storyboard, but how do I integrate that storyboard into my project and navigate to the new storyboard's views in Swift code?
You need to get a reference to the desired storyboard
let aStoryboard = UIStoryboard(name: "storyboardName", bundle: nil)
Then instantiate desired view controller
let vc = aStoryboard.instantiateViewControllerWithIdentifier("viewControllerIdentifier") as! UIViewController
i have an issue. I would like to change the view controller in swift.
This is a part of my code:
if success == "1" {
NSLog("Login SUCCESS");
var prefs:NSUserDefaults = NSUserDefaults.standardUserDefaults()
prefs.setObject(mobile, forKey: "USERNAME")
prefs.setInteger(1, forKey: "ISLOGGEDIN")
prefs.synchronize()
self.presentViewController(OtpVC(), animated: true, completion: nil)
}
my OtpVC file is:
class OtpVC: UIViewController {
#IBOutlet weak var smsfield: UITextField!
#IBAction func continueButton(sender: AnyObject) {
}
}
The problem now is that when is login successful the page change and goes all black!
How i can fix that? Thanks in advance.
The page in blank is an indicator of that your view has not being loaded. And it seems like that's the case:
Please take a closer look, you are creating an instance of that class, but you are not instantiating the view of it.
In swift you can have single classes affecting several views in your
storyboards.
The correct way, should be:
if success == "1" {
NSLog("Login SUCCESS");
var prefs:NSUserDefaults = NSUserDefaults.standardUserDefaults()
prefs.setObject(mobile, forKey: "USERNAME")
prefs.setInteger(1, forKey: "ISLOGGEDIN")
prefs.synchronize()
var storyboard = UIStoryboard(name: "Main", bundle: nil)
"Main" here should be the name of the storyboard in which the OtpVC view is.
var controller = storyboard.instantiateViewControllerWithIdentifier("OtpVC") as! OtpVC
"OtpVC" here should be the storyboard identifier of your view
self.presentViewController(controller, animated: true, completion: nil)
}
Update:
Another root cause may be that your identifier is not well set at storyboard.
At your Identity Inspector settings should be similar to:
Here in Module, like I have no such Class on my targets it says None.
This could be something you may want to have a look at. Maybe in your storyboard you are referencing other target than the one with such OptVC class implementation.
You can also use segues.
Set a segue from one view controller to the one where you want to shift in the storyboard.
Also set the identifier of the segue in storyboard.
Now use below code
self.performSegueWithIdentifier("identifier", sender: self)
self.presentViewController(OtpVC(), animated: true, completion: nil)
With the line above, you'll create a new instance of OtpVC programmatically. It's not a problem if that's what you want and the view controller is coded properly to be initialized like that.
But because it's all black I assume you've created OtpVC in storyboard so you'll either need to use a segue like Sukhdeep Singh Kalra has suggested or instantiate it with:
let destination = storyboard?.instantiateViewControllerWithIdentifier("identifier") as! OtpVC
presentViewController(destination, animated: true, completion: nil)
Both options, you'll have to set an identifier.
To set an identifier for the latter, go to storyboard and click on your view controller. Make sure the view controller is selected by clicking the left yellow button on top of your view controller. Then in identity inspector, type in the identifier name and replace "identifier" in my example with that name.