Can't get variable in ViewController The 2019 Stack Overflow Developer Survey Results Are InSwift: How to access in AppDelegate variable from the View controller?How to change RootViewController in AppDelegate From Other ViewController?Xcode- how do I bind a combobox value from AppDelegate to ViewController?subscribeNext not getting values in AppDelegateBi-Directional communication between ViewController and AppDelegate with swift 2 for iOSWhy is this variable not printing in this function?How to use variable in other viewController? - SwiftExecuting NSApplicationDelegate Code Before ViewController viewDidLoadCall ViewController when applicationDidEnterBackground in AppDelegateHow to detect any keyboard activity in iOS AppCancelling a view controller from loading if a URL cannot load - Swift 4
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Can't get variable in ViewController
The 2019 Stack Overflow Developer Survey Results Are InSwift: How to access in AppDelegate variable from the View controller?How to change RootViewController in AppDelegate From Other ViewController?Xcode- how do I bind a combobox value from AppDelegate to ViewController?subscribeNext not getting values in AppDelegateBi-Directional communication between ViewController and AppDelegate with swift 2 for iOSWhy is this variable not printing in this function?How to use variable in other viewController? - SwiftExecuting NSApplicationDelegate Code Before ViewController viewDidLoadCall ViewController when applicationDidEnterBackground in AppDelegateHow to detect any keyboard activity in iOS AppCancelling a view controller from loading if a URL cannot load - Swift 4
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;
I want to get the ViewController variable From AppDelegate, I tried :
//1.
print(ViewController().strName)
//2.
let vc = ViewController()
print(vc.strName)
//3.
let vc = UIApplication.shared.keyWindow!.rootViewController as! ViewController
print(vc.strName)
All not working, the print value is empty...
The code in ViewController:
var strName : String = ""
override func viewDidLoad()
strName = "Tom"
xcode swift4 appdelegate
asked Mar 22 at 4:31
EdemEdem
124
add a comment |
I want to get the ViewController variable From AppDelegate, I tried :
//1.
print(ViewController().strName)
//2.
let vc = ViewController()
print(vc.strName)
//3.
let vc = UIApplication.shared.keyWindow!.rootViewController as! ViewController
print(vc.strName)
All not working, the print value is empty...
The code in ViewController:
var strName : String = ""
override func viewDidLoad()
strName = "Tom"
xcode swift4 appdelegate
asked Mar 22 at 4:31
EdemEdem
124
1
Can you share youViewControllerclass?
– Rakesha Shastri
Mar 22 at 5:00
Any answer work for you? If not plz share your ViewController Code for more information.
– jogshardik
Mar 23 at 4:55
Sorry reply too late. The code in ViewController is updated! Thanks. And the "print(...)" code actually is in notification but it doesn't matter right?
– Edem
Mar 25 at 2:44
add a comment |
I want to get the ViewController variable From AppDelegate, I tried :
//1.
print(ViewController().strName)
//2.
let vc = ViewController()
print(vc.strName)
//3.
let vc = UIApplication.shared.keyWindow!.rootViewController as! ViewController
print(vc.strName)
All not working, the print value is empty...
The code in ViewController:
var strName : String = ""
override func viewDidLoad()
strName = "Tom"
xcode swift4 appdelegate
asked Mar 22 at 4:31
EdemEdem
124
I want to get the ViewController variable From AppDelegate, I tried :
//1.
print(ViewController().strName)
//2.
let vc = ViewController()
print(vc.strName)
//3.
let vc = UIApplication.shared.keyWindow!.rootViewController as! ViewController
print(vc.strName)
All not working, the print value is empty...
The code in ViewController:
var strName : String = ""
override func viewDidLoad()
strName = "Tom"
xcode swift4 appdelegate
xcode swift4 appdelegate
asked Mar 22 at 4:31
EdemEdem
124
asked Mar 22 at 4:31
EdemEdem
124
edited Mar 25 at 2:46
Edem
asked Mar 22 at 4:31
EdemEdem
124
asked Mar 22 at 4:31
EdemEdem
124
asked Mar 22 at 4:31
EdemEdem
124
124
1
Can you share youViewControllerclass?
– Rakesha Shastri
Mar 22 at 5:00
Any answer work for you? If not plz share your ViewController Code for more information.
– jogshardik
Mar 23 at 4:55
Sorry reply too late. The code in ViewController is updated! Thanks. And the "print(...)" code actually is in notification but it doesn't matter right?
– Edem
Mar 25 at 2:44
add a comment |
1
Can you share youViewControllerclass?
– Rakesha Shastri
Mar 22 at 5:00
Any answer work for you? If not plz share your ViewController Code for more information.
– jogshardik
Mar 23 at 4:55
Sorry reply too late. The code in ViewController is updated! Thanks. And the "print(...)" code actually is in notification but it doesn't matter right?
– Edem
Mar 25 at 2:44
1
1
Can you share you
ViewController class?– Rakesha Shastri
Mar 22 at 5:00
Can you share you
ViewController class?– Rakesha Shastri
Mar 22 at 5:00
Any answer work for you? If not plz share your ViewController Code for more information.
– jogshardik
Mar 23 at 4:55
Any answer work for you? If not plz share your ViewController Code for more information.
– jogshardik
Mar 23 at 4:55
Sorry reply too late. The code in ViewController is updated! Thanks. And the "print(...)" code actually is in notification but it doesn't matter right?
– Edem
Mar 25 at 2:44
Sorry reply too late. The code in ViewController is updated! Thanks. And the "print(...)" code actually is in notification but it doesn't matter right?
– Edem
Mar 25 at 2:44
add a comment |
2 Answers
2
active
oldest
votes
I suggest to have a check in this link Swift: How to access in AppDelegate variable from the View controller?
else try in view controller,
class ViewController: UIViewController
var strName = "someString" // some value
In AppDelegate,
var mainViewController = ViewController()
func applicationWillEnterForeground(_ application: UIApplication)
_ = self.window?.rootViewController as? ViewController
print(mainViewController.strName)
answered Mar 22 at 4:52
AzeTechAzeTech
10929
This has a error message at "let viewController = self.window?.rootViewController as? ViewController"
– Edem
Mar 25 at 2:42
@Edem, just try now the edited (or)section
– AzeTech
Mar 25 at 5:55
@Edem, check the edited answer now, check whether u have navigation controller in view controller.... I have tried its working and I can print the value in appdelegate (or else try this is did finish launch section in app delegate )
– AzeTech
Mar 25 at 6:10
Yes, no error message, but still get empty value....
– Edem
Mar 25 at 6:56
1
Oh Yeh.......... I know, thank you a lot.
– Edem
Mar 25 at 9:17
|
show 4 more comments
First you need to set the storyboard identifier in interface builder
Than you have to your initiate your viewcontroller object using following code.
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
let viewcontroller = storyboard.instantiateViewController(withIdentifier: "ViewController") as? ViewController
Here you can change storyboard name according to your storyboard name.
After you got the controller object you can use easily find your viewcontroller variable.
answered Mar 22 at 4:55
jogshardikjogshardik
8531920
Why bring storyboards into it? You're adding complexity where it's not needed.
– Caleb
Mar 22 at 6:11
This has an error at "class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate {", it's shows " Thread 1: signal SIGABRT".
– Edem
Mar 25 at 2:41
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
I suggest to have a check in this link Swift: How to access in AppDelegate variable from the View controller?
else try in view controller,
class ViewController: UIViewController
var strName = "someString" // some value
In AppDelegate,
var mainViewController = ViewController()
func applicationWillEnterForeground(_ application: UIApplication)
_ = self.window?.rootViewController as? ViewController
print(mainViewController.strName)
answered Mar 22 at 4:52
AzeTechAzeTech
10929
This has a error message at "let viewController = self.window?.rootViewController as? ViewController"
– Edem
Mar 25 at 2:42
@Edem, just try now the edited (or)section
– AzeTech
Mar 25 at 5:55
@Edem, check the edited answer now, check whether u have navigation controller in view controller.... I have tried its working and I can print the value in appdelegate (or else try this is did finish launch section in app delegate )
– AzeTech
Mar 25 at 6:10
Yes, no error message, but still get empty value....
– Edem
Mar 25 at 6:56
1
Oh Yeh.......... I know, thank you a lot.
– Edem
Mar 25 at 9:17
|
show 4 more comments
I suggest to have a check in this link Swift: How to access in AppDelegate variable from the View controller?
else try in view controller,
class ViewController: UIViewController
var strName = "someString" // some value
In AppDelegate,
var mainViewController = ViewController()
func applicationWillEnterForeground(_ application: UIApplication)
_ = self.window?.rootViewController as? ViewController
print(mainViewController.strName)
answered Mar 22 at 4:52
AzeTechAzeTech
10929
This has a error message at "let viewController = self.window?.rootViewController as? ViewController"
– Edem
Mar 25 at 2:42
@Edem, just try now the edited (or)section
– AzeTech
Mar 25 at 5:55
@Edem, check the edited answer now, check whether u have navigation controller in view controller.... I have tried its working and I can print the value in appdelegate (or else try this is did finish launch section in app delegate )
– AzeTech
Mar 25 at 6:10
Yes, no error message, but still get empty value....
– Edem
Mar 25 at 6:56
1
Oh Yeh.......... I know, thank you a lot.
– Edem
Mar 25 at 9:17
|
show 4 more comments
I suggest to have a check in this link Swift: How to access in AppDelegate variable from the View controller?
else try in view controller,
class ViewController: UIViewController
var strName = "someString" // some value
In AppDelegate,
var mainViewController = ViewController()
func applicationWillEnterForeground(_ application: UIApplication)
_ = self.window?.rootViewController as? ViewController
print(mainViewController.strName)
answered Mar 22 at 4:52
AzeTechAzeTech
10929
I suggest to have a check in this link Swift: How to access in AppDelegate variable from the View controller?
else try in view controller,
class ViewController: UIViewController
var strName = "someString" // some value
In AppDelegate,
var mainViewController = ViewController()
func applicationWillEnterForeground(_ application: UIApplication)
_ = self.window?.rootViewController as? ViewController
print(mainViewController.strName)
answered Mar 22 at 4:52
AzeTechAzeTech
10929
edited Mar 25 at 6:02
answered Mar 22 at 4:52
AzeTechAzeTech
10929
answered Mar 22 at 4:52
AzeTechAzeTech
10929
answered Mar 22 at 4:52
AzeTechAzeTech
10929
10929
This has a error message at "let viewController = self.window?.rootViewController as? ViewController"
– Edem
Mar 25 at 2:42
@Edem, just try now the edited (or)section
– AzeTech
Mar 25 at 5:55
@Edem, check the edited answer now, check whether u have navigation controller in view controller.... I have tried its working and I can print the value in appdelegate (or else try this is did finish launch section in app delegate )
– AzeTech
Mar 25 at 6:10
Yes, no error message, but still get empty value....
– Edem
Mar 25 at 6:56
1
Oh Yeh.......... I know, thank you a lot.
– Edem
Mar 25 at 9:17
|
show 4 more comments
This has a error message at "let viewController = self.window?.rootViewController as? ViewController"
– Edem
Mar 25 at 2:42
@Edem, just try now the edited (or)section
– AzeTech
Mar 25 at 5:55
@Edem, check the edited answer now, check whether u have navigation controller in view controller.... I have tried its working and I can print the value in appdelegate (or else try this is did finish launch section in app delegate )
– AzeTech
Mar 25 at 6:10
Yes, no error message, but still get empty value....
– Edem
Mar 25 at 6:56
1
Oh Yeh.......... I know, thank you a lot.
– Edem
Mar 25 at 9:17
This has a error message at "let viewController = self.window?.rootViewController as? ViewController"
– Edem
Mar 25 at 2:42
This has a error message at "let viewController = self.window?.rootViewController as? ViewController"
– Edem
Mar 25 at 2:42
@Edem, just try now the edited (or)section
– AzeTech
Mar 25 at 5:55
@Edem, just try now the edited (or)section
– AzeTech
Mar 25 at 5:55
@Edem, check the edited answer now, check whether u have navigation controller in view controller.... I have tried its working and I can print the value in appdelegate (or else try this is did finish launch section in app delegate )
– AzeTech
Mar 25 at 6:10
@Edem, check the edited answer now, check whether u have navigation controller in view controller.... I have tried its working and I can print the value in appdelegate (or else try this is did finish launch section in app delegate )
– AzeTech
Mar 25 at 6:10
Yes, no error message, but still get empty value....
– Edem
Mar 25 at 6:56
Yes, no error message, but still get empty value....
– Edem
Mar 25 at 6:56
1
1
Oh Yeh.......... I know, thank you a lot.
– Edem
Mar 25 at 9:17
Oh Yeh.......... I know, thank you a lot.
– Edem
Mar 25 at 9:17
|
show 4 more comments
First you need to set the storyboard identifier in interface builder
Than you have to your initiate your viewcontroller object using following code.
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
let viewcontroller = storyboard.instantiateViewController(withIdentifier: "ViewController") as? ViewController
Here you can change storyboard name according to your storyboard name.
After you got the controller object you can use easily find your viewcontroller variable.
answered Mar 22 at 4:55
jogshardikjogshardik
8531920
Why bring storyboards into it? You're adding complexity where it's not needed.
– Caleb
Mar 22 at 6:11
This has an error at "class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate {", it's shows " Thread 1: signal SIGABRT".
– Edem
Mar 25 at 2:41
add a comment |
First you need to set the storyboard identifier in interface builder
Than you have to your initiate your viewcontroller object using following code.
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
let viewcontroller = storyboard.instantiateViewController(withIdentifier: "ViewController") as? ViewController
Here you can change storyboard name according to your storyboard name.
After you got the controller object you can use easily find your viewcontroller variable.
answered Mar 22 at 4:55
jogshardikjogshardik
8531920
Why bring storyboards into it? You're adding complexity where it's not needed.
– Caleb
Mar 22 at 6:11
This has an error at "class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate {", it's shows " Thread 1: signal SIGABRT".
– Edem
Mar 25 at 2:41
add a comment |
First you need to set the storyboard identifier in interface builder
Than you have to your initiate your viewcontroller object using following code.
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
let viewcontroller = storyboard.instantiateViewController(withIdentifier: "ViewController") as? ViewController
Here you can change storyboard name according to your storyboard name.
After you got the controller object you can use easily find your viewcontroller variable.
answered Mar 22 at 4:55
jogshardikjogshardik
8531920
First you need to set the storyboard identifier in interface builder
Than you have to your initiate your viewcontroller object using following code.
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
let viewcontroller = storyboard.instantiateViewController(withIdentifier: "ViewController") as? ViewController
Here you can change storyboard name according to your storyboard name.
After you got the controller object you can use easily find your viewcontroller variable.
answered Mar 22 at 4:55
jogshardikjogshardik
8531920
answered Mar 22 at 4:55
jogshardikjogshardik
8531920
answered Mar 22 at 4:55
jogshardikjogshardik
8531920
answered Mar 22 at 4:55
jogshardikjogshardik
8531920
8531920
Why bring storyboards into it? You're adding complexity where it's not needed.
– Caleb
Mar 22 at 6:11
This has an error at "class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate {", it's shows " Thread 1: signal SIGABRT".
– Edem
Mar 25 at 2:41
add a comment |
Why bring storyboards into it? You're adding complexity where it's not needed.
– Caleb
Mar 22 at 6:11
This has an error at "class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate {", it's shows " Thread 1: signal SIGABRT".
– Edem
Mar 25 at 2:41
Why bring storyboards into it? You're adding complexity where it's not needed.
– Caleb
Mar 22 at 6:11
Why bring storyboards into it? You're adding complexity where it's not needed.
– Caleb
Mar 22 at 6:11
This has an error at "class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate {", it's shows " Thread 1: signal SIGABRT".
– Edem
Mar 25 at 2:41
This has an error at "class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate {", it's shows " Thread 1: signal SIGABRT".
– Edem
Mar 25 at 2:41
add a comment |
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1
Can you share you
ViewControllerclass?– Rakesha Shastri
Mar 22 at 5:00
Any answer work for you? If not plz share your ViewController Code for more information.
– jogshardik
Mar 23 at 4:55
Sorry reply too late. The code in ViewController is updated! Thanks. And the "print(...)" code actually is in notification but it doesn't matter right?
– Edem
Mar 25 at 2:44