Changing navigationBar.title according to mode/case?
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
427
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
427
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
427
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
427
asked Nov 15 '18 at 9:13
Anton BjergAnton Bjerg
427
asked Nov 15 '18 at 9:13
Anton BjergAnton Bjerg
427
asked Nov 15 '18 at 9:13
Anton BjergAnton Bjerg
427
asked Nov 15 '18 at 9:13
Anton BjergAnton Bjerg
427
427
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
1966
add a comment |
Your Answer
StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53315928%2fchanging-navigationbar-title-according-to-mode-case%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
try this self.navigationItem.title = "text"
answered Nov 15 '18 at 9:19
DronPopDronPop
1966
add a comment |
1
try this self.navigationItem.title = "text"
answered Nov 15 '18 at 9:19
DronPopDronPop
1966
add a comment |
1
1
1
try this self.navigationItem.title = "text"
answered Nov 15 '18 at 9:19
DronPopDronPop
1966
try this self.navigationItem.title = "text"
answered Nov 15 '18 at 9:19
DronPopDronPop
1966
answered Nov 15 '18 at 9:19
DronPopDronPop
1966
answered Nov 15 '18 at 9:19
DronPopDronPop
1966
answered Nov 15 '18 at 9:19
DronPopDronPop
1966
1966
add a comment |
add a comment |
draft saved
draft discarded
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53315928%2fchanging-navigationbar-title-according-to-mode-case%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
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