Changing navigationBar.title according to mode/case?
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I have viewController, which has three cases/three modes.
It has a 'Create New Person' mode, a 'Show Person' mode and finally a 'Edit Person' mode. This all works fine - but I can't seem to set the navigationBar.title according to mode/case.
Here's the relevant code:
private func modeUpdate()
let createNewPerson:[NSAttributedString.Key: Any] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue):UIColor.blue, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue):UIFont(name:"Create New Person", size: 17)!]
let showPerson:[NSAttributedString.Key: Any] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue):UIColor.blue, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue):UIFont(name:"", size: 17)!]
let editPerson:[NSAttributedString.Key: Any] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue):UIColor.blue, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue):UIFont(name:"Edit Person", size: 17)!]
switch mode
case .create:
actionButton.title = "Save"
personName.isEditable = true
navigationController?.navigationBar.titleTextAttributes = createNewPerson
question.isEditable = false
personAnswer.isEditable = true
extraIdentifier.isEditable = false
extraIdentifierAnswer.isEditable = true
case .show:
actionButton.title = "Edit"
navigationController?.navigationBar.titleTextAttributes = showPerson
personName.isEditable = false
question.isEditable = false
personAnswer.isEditable = false
extraIdentifier.isEditable = false
extraIdentifierAnswer.isEditable = false
case .edit:
actionButton.title = "Save"
navigationController?.navigationBar.titleTextAttributes = editPerson
personName.isEditable = true
question.isEditable = false
personAnswer.isEditable = true
extraIdentifier.isEditable = false
extraIdentifierAnswer.isEditable = true
It all compiles, but when I enter either one of the three cases on my device, I get: 'Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value' on the line 'let createNewPerson:[NSAttributed....'
Does anyone know why this happens?
Thanks!
ios swift uinavigationcontroller switch-statement navigationbar
asked Nov 15 '18 at 9:13
Anton BjergAnton Bjerg
387
add a comment |
0
I have viewController, which has three cases/three modes.
It has a 'Create New Person' mode, a 'Show Person' mode and finally a 'Edit Person' mode. This all works fine - but I can't seem to set the navigationBar.title according to mode/case.
Here's the relevant code:
private func modeUpdate()
let createNewPerson:[NSAttributedString.Key: Any] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue):UIColor.blue, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue):UIFont(name:"Create New Person", size: 17)!]
let showPerson:[NSAttributedString.Key: Any] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue):UIColor.blue, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue):UIFont(name:"", size: 17)!]
let editPerson:[NSAttributedString.Key: Any] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue):UIColor.blue, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue):UIFont(name:"Edit Person", size: 17)!]
switch mode
case .create:
actionButton.title = "Save"
personName.isEditable = true
navigationController?.navigationBar.titleTextAttributes = createNewPerson
question.isEditable = false
personAnswer.isEditable = true
extraIdentifier.isEditable = false
extraIdentifierAnswer.isEditable = true
case .show:
actionButton.title = "Edit"
navigationController?.navigationBar.titleTextAttributes = showPerson
personName.isEditable = false
question.isEditable = false
personAnswer.isEditable = false
extraIdentifier.isEditable = false
extraIdentifierAnswer.isEditable = false
case .edit:
actionButton.title = "Save"
navigationController?.navigationBar.titleTextAttributes = editPerson
personName.isEditable = true
question.isEditable = false
personAnswer.isEditable = true
extraIdentifier.isEditable = false
extraIdentifierAnswer.isEditable = true
It all compiles, but when I enter either one of the three cases on my device, I get: 'Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value' on the line 'let createNewPerson:[NSAttributed....'
Does anyone know why this happens?
Thanks!
ios swift uinavigationcontroller switch-statement navigationbar
asked Nov 15 '18 at 9:13
Anton BjergAnton Bjerg
387
we are missing a lot of the picture, so can only guess that something that's optional, you're force-unwrapping? ie:!
– Alex Ioja-Yang
Nov 15 '18 at 9:15
Well, I'm force-unwrapping all the three 'let lines', in which I declare the different titles. But when I try to unwrap it into Any, as xCode suggest, when I remove the !-marks, the navigationBar.title remains empty - and the app crashes, when trying to use navigationController to get back from one of the cases...
– Anton Bjerg
Nov 15 '18 at 9:18
You need to learn about the syntax :) UIFont and NavigationBarTitle is different thing...
– Ashish Kakkad
Nov 15 '18 at 9:41
add a comment |
0
0
0
I have viewController, which has three cases/three modes.
It has a 'Create New Person' mode, a 'Show Person' mode and finally a 'Edit Person' mode. This all works fine - but I can't seem to set the navigationBar.title according to mode/case.
Here's the relevant code:
private func modeUpdate()
let createNewPerson:[NSAttributedString.Key: Any] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue):UIColor.blue, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue):UIFont(name:"Create New Person", size: 17)!]
let showPerson:[NSAttributedString.Key: Any] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue):UIColor.blue, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue):UIFont(name:"", size: 17)!]
let editPerson:[NSAttributedString.Key: Any] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue):UIColor.blue, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue):UIFont(name:"Edit Person", size: 17)!]
switch mode
case .create:
actionButton.title = "Save"
personName.isEditable = true
navigationController?.navigationBar.titleTextAttributes = createNewPerson
question.isEditable = false
personAnswer.isEditable = true
extraIdentifier.isEditable = false
extraIdentifierAnswer.isEditable = true
case .show:
actionButton.title = "Edit"
navigationController?.navigationBar.titleTextAttributes = showPerson
personName.isEditable = false
question.isEditable = false
personAnswer.isEditable = false
extraIdentifier.isEditable = false
extraIdentifierAnswer.isEditable = false
case .edit:
actionButton.title = "Save"
navigationController?.navigationBar.titleTextAttributes = editPerson
personName.isEditable = true
question.isEditable = false
personAnswer.isEditable = true
extraIdentifier.isEditable = false
extraIdentifierAnswer.isEditable = true
It all compiles, but when I enter either one of the three cases on my device, I get: 'Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value' on the line 'let createNewPerson:[NSAttributed....'
Does anyone know why this happens?
Thanks!
ios swift uinavigationcontroller switch-statement navigationbar
asked Nov 15 '18 at 9:13
Anton BjergAnton Bjerg
387
I have viewController, which has three cases/three modes.
It has a 'Create New Person' mode, a 'Show Person' mode and finally a 'Edit Person' mode. This all works fine - but I can't seem to set the navigationBar.title according to mode/case.
Here's the relevant code:
private func modeUpdate()
let createNewPerson:[NSAttributedString.Key: Any] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue):UIColor.blue, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue):UIFont(name:"Create New Person", size: 17)!]
let showPerson:[NSAttributedString.Key: Any] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue):UIColor.blue, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue):UIFont(name:"", size: 17)!]
let editPerson:[NSAttributedString.Key: Any] = [NSAttributedString.Key(rawValue: NSAttributedString.Key.foregroundColor.rawValue):UIColor.blue, NSAttributedString.Key(rawValue: NSAttributedString.Key.font.rawValue):UIFont(name:"Edit Person", size: 17)!]
switch mode
case .create:
actionButton.title = "Save"
personName.isEditable = true
navigationController?.navigationBar.titleTextAttributes = createNewPerson
question.isEditable = false
personAnswer.isEditable = true
extraIdentifier.isEditable = false
extraIdentifierAnswer.isEditable = true
case .show:
actionButton.title = "Edit"
navigationController?.navigationBar.titleTextAttributes = showPerson
personName.isEditable = false
question.isEditable = false
personAnswer.isEditable = false
extraIdentifier.isEditable = false
extraIdentifierAnswer.isEditable = false
case .edit:
actionButton.title = "Save"
navigationController?.navigationBar.titleTextAttributes = editPerson
personName.isEditable = true
question.isEditable = false
personAnswer.isEditable = true
extraIdentifier.isEditable = false
extraIdentifierAnswer.isEditable = true
It all compiles, but when I enter either one of the three cases on my device, I get: 'Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value' on the line 'let createNewPerson:[NSAttributed....'
Does anyone know why this happens?
Thanks!
ios swift uinavigationcontroller switch-statement navigationbar
ios swift uinavigationcontroller switch-statement navigationbar
asked Nov 15 '18 at 9:13
Anton BjergAnton Bjerg
387
asked Nov 15 '18 at 9:13
Anton BjergAnton Bjerg
387
asked Nov 15 '18 at 9:13
Anton BjergAnton Bjerg
387
asked Nov 15 '18 at 9:13
Anton BjergAnton Bjerg
387
asked Nov 15 '18 at 9:13
Anton BjergAnton Bjerg
387
387
we are missing a lot of the picture, so can only guess that something that's optional, you're force-unwrapping? ie:!
– Alex Ioja-Yang
Nov 15 '18 at 9:15
Well, I'm force-unwrapping all the three 'let lines', in which I declare the different titles. But when I try to unwrap it into Any, as xCode suggest, when I remove the !-marks, the navigationBar.title remains empty - and the app crashes, when trying to use navigationController to get back from one of the cases...
– Anton Bjerg
Nov 15 '18 at 9:18
You need to learn about the syntax :) UIFont and NavigationBarTitle is different thing...
– Ashish Kakkad
Nov 15 '18 at 9:41
add a comment |
we are missing a lot of the picture, so can only guess that something that's optional, you're force-unwrapping? ie:!
– Alex Ioja-Yang
Nov 15 '18 at 9:15
Well, I'm force-unwrapping all the three 'let lines', in which I declare the different titles. But when I try to unwrap it into Any, as xCode suggest, when I remove the !-marks, the navigationBar.title remains empty - and the app crashes, when trying to use navigationController to get back from one of the cases...
– Anton Bjerg
Nov 15 '18 at 9:18
You need to learn about the syntax :) UIFont and NavigationBarTitle is different thing...
– Ashish Kakkad
Nov 15 '18 at 9:41
we are missing a lot of the picture, so can only guess that something that's optional, you're force-unwrapping? ie:
!– Alex Ioja-Yang
Nov 15 '18 at 9:15
we are missing a lot of the picture, so can only guess that something that's optional, you're force-unwrapping? ie:
!– Alex Ioja-Yang
Nov 15 '18 at 9:15
Well, I'm force-unwrapping all the three 'let lines', in which I declare the different titles. But when I try to unwrap it into Any, as xCode suggest, when I remove the !-marks, the navigationBar.title remains empty - and the app crashes, when trying to use navigationController to get back from one of the cases...
– Anton Bjerg
Nov 15 '18 at 9:18
Well, I'm force-unwrapping all the three 'let lines', in which I declare the different titles. But when I try to unwrap it into Any, as xCode suggest, when I remove the !-marks, the navigationBar.title remains empty - and the app crashes, when trying to use navigationController to get back from one of the cases...
– Anton Bjerg
Nov 15 '18 at 9:18
You need to learn about the syntax :) UIFont and NavigationBarTitle is different thing...
– Ashish Kakkad
Nov 15 '18 at 9:41
You need to learn about the syntax :) UIFont and NavigationBarTitle is different thing...
– Ashish Kakkad
Nov 15 '18 at 9:41
add a comment |
1 Answer
1
active
oldest
votes
1
try this self.navigationItem.title = "text"
answered Nov 15 '18 at 9:19
DronPopDronPop
19626
add a comment |
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1 Answer
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1 Answer
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votes
1
try this self.navigationItem.title = "text"
answered Nov 15 '18 at 9:19
DronPopDronPop
19626
add a comment |
1
try this self.navigationItem.title = "text"
answered Nov 15 '18 at 9:19
DronPopDronPop
19626
add a comment |
1
1
1
try this self.navigationItem.title = "text"
answered Nov 15 '18 at 9:19
DronPopDronPop
19626
try this self.navigationItem.title = "text"
answered Nov 15 '18 at 9:19
DronPopDronPop
19626
answered Nov 15 '18 at 9:19
DronPopDronPop
19626
answered Nov 15 '18 at 9:19
DronPopDronPop
19626
answered Nov 15 '18 at 9:19
DronPopDronPop
19626
19626
add a comment |
add a comment |
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we are missing a lot of the picture, so can only guess that something that's optional, you're force-unwrapping? ie:
!– Alex Ioja-Yang
Nov 15 '18 at 9:15
Well, I'm force-unwrapping all the three 'let lines', in which I declare the different titles. But when I try to unwrap it into Any, as xCode suggest, when I remove the !-marks, the navigationBar.title remains empty - and the app crashes, when trying to use navigationController to get back from one of the cases...
– Anton Bjerg
Nov 15 '18 at 9:18
You need to learn about the syntax :) UIFont and NavigationBarTitle is different thing...
– Ashish Kakkad
Nov 15 '18 at 9:41