I want to change the title of post buttons in SLComposeServiceViewController.
I managed to get the UIButton:
NSArray* subviews =[self.navigationController.navigationBar subviews];
UIButton* postButton =[subviews lastObject];
and i tried to set title like this:
[postButton setTitle:#"Save" forState:UIControlStateNormal];
but the title not changed.
Can anyone help me with this?
I saw Evernote's share extension on my iPad and it looks like this:
UPDATE
My Solution:
I found solution for my question,I removed the original navigation bar and create custom nav bar.
I have two nav bar:
1. with "cancel"\"save" buttons
2. with "back" button
and I change them when navigate to other viewcontroller
(in my case I needed to upload file and user need select location from list)
NOTE: if you not implement configurationItems you need only the first nav bar. (just call to set custom nav bar from viewDidAppear
So my code is here:
#property (strong, nonatomic) UINavigationBar *customNavBar;
-(void) viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
self.customNavBar = [[UINavigationBar alloc] initWithFrame:self.navigationController.navigationBar.bounds];
[self.navigationController.navigationBar removeFromSuperview];
[self.navigationController.view addSubview:self.customNavBar];
[self setCancelSaveNavigationItem];
}
setCancelSaveNavigationItem--> called from viewDidAppear of shareViewController
-(void)setCancelSaveNavigationItem
{
UINavigationItem *newItem = [[UINavigationItem alloc] init];
UIBarButtonItem *cancelBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(#"Cancel",nil) style:UIBarButtonItemStylePlain target:self action:#selector(cancelButtonTapped:)];
UIBarButtonItem *saveBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(#"Done",nil) style:UIBarButtonItemStyleDone target:self action:#selector(saveButtonTapped:)];
newItem.leftBarButtonItem = cancelBarButtonItem;
newItem.rightBarButtonItem = saveBarButtonItem;
[self.customNavBar setItems:#[newItem]];
[self.navigationItem setBackBarButtonItem:cancelBarButtonItem];
[self.navigationItem setRightBarButtonItem:saveBarButtonItem];
if(self.item.value == nil){
saveBarButtonItem.enabled = NO;
}
}
setBackNavigationItem--> called in configurationItems -->in self.item.tapHandler function
-(void)setBackNavigationItem
{
UINavigationItem *newItem = [[UINavigationItem alloc] init];
UIBarButtonItem *selectBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(#"Select",nil) style:UIBarButtonItemStylePlain target:self action:#selector(selectButtonTapped:)];
UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:[NSString stringWithFormat:#"❮ %#", NSLocalizedString(#"Back",nil)] style:UIBarButtonItemStylePlain target:self action:#selector(backButtonTapped:)];
newItem.leftBarButtonItem = backBarButtonItem;
newItem.rightBarButtonItem = selectBarButtonItem;
[self.customNavBar setItems:#[newItem]];
[self.navigationItem setBackBarButtonItem:backBarButtonItem];
[self.navigationItem setRightBarButtonItem:selectBarButtonItem];
}
Handle buttons tapped:
- (void)backButtonTapped:(id)sender {
if([self.navigationController.viewControllers count] ==2){
[self setCancelSaveNavigationItem];
}
[self.navigationController popViewControllerAnimated:YES];
}
- (void)cancelButtonTapped:(id)sender {
[self cancel];
}
- (void)selectButtonTapped:(id)sender {
...
[self setCancelSaveNavigationItem];
[self popConfigurationViewController];
}
- (void)saveButtonTapped:(id)sender {
...
[self cancel];
}
And it's work for me!!!
The result:
Simply in viewDidAppear
self.navigationController?.navigationBar.topItem?.rightBarButtonItem?.title = "Save"
Your code:
NSArray* subviews =[self.navigationController.navigationBar subviews];
UIButton* postButton =[subviews lastObject];
...is a really bad idea. It only works because the post button is in subviews and is the last item in the array. But the content of subviews is undocumented and might change at any time. Also, since there's no public API for this button, it's entirely possible that there's framework code to prevent or override changes to the button text-- so even if we assume you have the right UI element, you still might not be able to change it.
Evernote's UI is almost certainly a full custom design that only resembles SLComposeServiceViewController. Share extensions are not required to use SLComposeServiceViewController, that's just there for convenience. If it doesn't meet your needs, design your own.
Update: out of curiosity I unzipped the Evernote IPA and had a look at EvernoteShare.appex with nm. There's no reference to SLComposeServiceViewController, which confirms that Evernote is not using that class in their extension.
I have a "LoginViewController" which presents a new Controller which is a subclass of UINavigationcontroller when clicking a button:
MPNavigationViewController *controller = [[MPNavigationViewController alloc] initWithRootViewController:[[MPQuestionFirstViewController alloc] init]];
[self presentViewController: controller animated:YES completion:nil];
"MPNavigationViewController" subclass UINavigationController and uses "REMenu" to have a sliding-from-top menu ("Link") and on viewDidLoad I try to add a right button to open it:
- (void)viewDidLoad
{
[super viewDidLoad];
UIBarButtonItem *toggleMenuButton = [[UIBarButtonItem alloc] initWithTitle:#"Show" style:UIBarButtonItemStylePlain target:self action:#selector(toggleMenu:)];
self.navigationItem.rightBarButtonItem = toggleMenuButton;
[self initMenu];
}
It doesn't show any button on the navigation bar. Why could it be?
If I try to add the button from one of the "viewControllers" that will handle sections on the menu. It shows the button, but it doesn't paint it at all.
Thanks.
You are using subclass of UINavigationcontroller which is not actually view controller.
There is only one solution, You need to create your custom button and add it to UINavigationbar as a subview..
Use this hope it will help.
UIBarButtonItem *doneButton =[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:#selector(goToDoneButtonAction)];
self.navigationItem.rightBarButtonItem = doneButton;
First View has a compose button that calls the composeview as modal dialog. I have added a cancel button to the second view. Where do I add the action for the cancel button?
ComposeTweetVC* composeViewController = [[ComposeTweetVC alloc] initWithNibName:#"ComposeTweetVC" bundle:[NSBundle mainBundle]];
UINavigationController *nvc = [[UINavigationController alloc] initWithRootViewController:composeViewController];
UIBarButtonItem *newBackButton =
[[UIBarButtonItem alloc] initWithTitle:#"Cancel"
style:UIBarButtonItemStyleBordered
target:nil
action:#selector(backPressed:)];
composeViewController.navigationItem.leftBarButtonItem = newBackButton;
[self presentViewController:nvc animated:YES completion:nil];
Where do I add the backPressed method? If I add to the viewcontroller calling the composeviewcontroller, it is never called.
You can add it wherever you want.
Your problem is:
target:nil
You are essentially calling [nil backPressed:] which is a NOOP.
Try changing nil to self or composeViewController, or whatever object you want to be notified when the button is pressed.
You are setting the target to nil so the backPressed: will never be called
try to change this line
UIBarButtonItem *newBackButton = [[UIBarButtonItem alloc] initWithTitle:#"Cancel"
style:UIBarButtonItemStyleBordered
target:nil
action:#selector(backPressed:)];
to be
UIBarButtonItem *newBackButton = [[UIBarButtonItem alloc] initWithTitle:#"Cancel"
style:UIBarButtonItemStyleBordered
target: composeViewController
action:#selector(backPressed:)];
set your target
initWithTitle:style:target:action:
Initializes a new item using the specified title and other properties.
- (id)initWithTitle:(NSString *)title style:(UIBarButtonItemStyle)style target:(id)target action:(SEL)action
Parameters
title
The item’s title. If nil a title is not displayed.
style
The style of the item. One of the constants defined in UIBarButtonItemStyle.
target
The object that receives the action message.
action
The action to send to target when this item is selected.
and then use
-(void) backPressed:(id)sender{
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)viewDidLoad {
[super viewDidLoad];
UIBarButtonItem *refreshButton = [[UIBarButtonItem alloc] initWithTitle:#"Refresh" style:UIBarButtonItemStylePlain target:self action:#selector(refreshButtonClicked:)];
[self.navigationItem setRightBarButtonItem:refreshButton animated:YES];
}
- (void)refreshButtonClicked:(id)sender {
NSLog(#"Refreshed.");
}
I added a navigation controller programmatically in AppDelegate and set this view as the root.
When I was trying to add a navigationItem programmatically as shown above, the refreshButton showed in the navigation bar but refreshButtonClicked: was not invoked.
What's the problem? Any suggestions and comments are welcome.
Make a call to the super class in your viewDidLoad
- (void)viewDidLoad {
[super viewDidLoad];
UIBarButtonItem *refreshButton = [[UIBarButtonItem alloc] initWithTitle:#"Refresh" style:UIBarButtonItemStylePlain target:self action:#selector(refreshButtonClicked:)];
[self.navigationItem setRightBarButtonItem:refreshButton animated:YES];
}
It will ensure that the root class setup is done
Problem solved. Weird. After I clean the builds, delete the derived data and restart Xcode, it goes runs properly.
By default the back button uses as a text on it a title of a viewcontroller.
Can I change text on the back button without changing a title of a view controller?
I need this because I have a view controller which title is too long to display and in this case I would like to display just "Back" as a caption for back button.
I tried the following which didn't work:
self.navigationItem.leftBarButtonItem.title = #"Back";
Thanks.
Try
self.navigationItem.backBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:nil action:nil] autorelease];
I found that by looking at the backBarButtonItem docs in Apple's docs for UINavigationItem.
Marc W's approach worked great once I figured out which controller to apply it to: the one being re-titled, not the one on top. So if this is the navigation stack:
(bottom) ControllerA -> ControllerB (top)
...and you want to give a shorter title for ControllerA in the back-button displayed when ControllerB is on top, you apply the property change to ControllerA.
So it's more in the context of self.title, not like the other left/right-bar-button setters.
You can do it in the storyboard. Find the view controller you want to go back to (the one with the long title), select it's Navigation Item, and open the Attributes Inspector (Alt+Cmd+4), insert the custom Back Button title.
Thanks Marco... that helped me...
Here is what i did.
If you are using a tableView to navigate to different views... put the code:
self.navigationItem.backBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:nil action:nil] autorelease];
In your didSelectRowAtIndexPath method... of the first Controller... Controller A.
When you navigate to Controller B the button will have the title "Back".
The back button pulls its text from the title of the parent view controller.
In the parent view controller (the view controller that appears when you tap the back button), set its own title as the desired text on the back button.
For example, let's say we have a RootViewController class. When we click a cell in its table view, we push an instance of SecondViewController. We want the back button of the SecondViewController instance to read, "Home."
in the viewDidLoad method of RootViewController.m:
self.title = #"Home";
in the viewDidLoad method of SecondViewController.m:
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:nil action:nil];
self.navigationItem.backBarButtonItem = backButton;
[backButton release];
If you want your back button to read, "Back," set the title of the parent view controller to #"Back";
This work better for me. Try :
self.navigationController.navigationBar.topItem.backBarButtonItem = [[UIBarButtonItem alloc]
initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:nil action:nil];
If you are using storyboard:
Open StoryBoard
In Document Outline window find ViewController to which you want to
return to
Click on Navigation Item of that ViewController
In Attributes explorer change Back Button value to your custom tile
That is it, enjoy...
And in MonoTouch the following works (in ViewDidLoad of the parent controller):
NavigationItem.BackBarButtonItem = new UIBarButtonItem( "Back", UIBarButtonItemStyle.Plain, null);
[self.navigationItem setBackBarButtonItem:[[UIBarButtonItem alloc]
initWithTitle:#"Back" style:UIBarButtonItemStyleBordered target:nil action:nil]];
This worked for me.
In your parent view controller, set the back button when view loads:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.navigationItem.backBarButtonItem =
[[UIBarButtonItem alloc] initWithTitle:#"title"
style:UIBarButtonItemStylePlain
target:nil
action:nil];
}
Notice that we don't need to include autorelease at the end with the latest iOS version.
Hope this helps!
[self.navigationController.navigationBar.backItem setTitle:#"back"];
It works for me. You can replace "back" with something else.
This one worked for me if you don't want to have a title!
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#" " style:UIBarButtonItemStylePlain target:nil action:nil];
self.navigationController.navigationBar.topItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:nil action:nil];
I finally knew why these answers did not work for me at first. I set the title in storyboard. When i set the title on code. it works!
self.navigationItem.title = #"Main Menu";
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:#" " style:UIBarButtonItemStyleBordered target:nil action:nil];
[[self navigationItem] setBackBarButtonItem:backButton];
My solution was to set title when the view controller is pushed to navigation stack and reset it by use of delegate method before pushed vc closes:
So I put the title change in calling view controller when I push the other view controller like:
self.pushedVC = [self.storyboard instantiateViewControllerWithIdentifier:#"pushedVCIdentifier"];
self.pushedVC.delegate = self;
[self.navigationController pushViewController:self.pushedVC animated:YES];
self.title = #"Back";
and in delegate callback function (which I invoke in viewWillDissapear):
-(void)pushedVCWillClose:(PushedVC *)sender
{
self.title = #"Previous Title";
}
If you want not only to change the text of the Back button and remain the original left-arrow shape, but also to do something when user clicks the Back button, I recommend you to have a look around my "CustomNavigationController".
//You can achieve this by setting the title in the previous view controller as shown below
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
//Set Title for this view
self.navigationItem.title = "My Title"
}
override func viewWillDisappear(animated: Bool) {
super.viewWillAppear(animated)
//Set Title for back button in next view
self.navigationItem.title = "Back"
}
For to change back button title, refer below code
InformationVC *infoController=[[InformationVC alloc]init];[self.navigationController infoController animated:YES];
//Below code changed back button title on InformationVC page.
UIBarButtonItem *backBarButton = [[UIBarButtonItem alloc] initWithTitle:#"Information" style: UIBarButtonItemStylePlain target: nil action: nil];
self.navigationItem.backBarButtonItem = backBarButton;`enter code here`
In Swift5, the backBarButtom cannot be edited. Hence, we need to hide the backBarButtom first, then use a customised leftbarButtom to replace backBarButtom. Here is the detailed solution: https://stackoverflow.com/a/63868300/13939003
This worked for me:
self.navigationController.navigationBar.topItem.title = "Back"