I'm currently trying to create a popover menu, with a navigationBar, and a backButton that bring me back to the main ViewController.
Posts over here helped me a lot to create my functions.
I put NSLogs in my code and everything works perfectly.... But the backButton itself, which do nothing.
So. My back button is declared in my .h file like that:
#property (strong, nonatomic) IBOutlet UIButton *backButton;
and I have those two functions in my .m :
-(void)setBackButton:(UIButton *)backButton
{
NSLog(#"setBackButton: called");
[_backButton addTarget:self action:#selector(backBtn:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *backButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
[self.navigationItem setBackBarButtonItem:backButtonItem];
}
- (IBAction)backBtn:(id)sender {
NSLog(#"backBtn: called");
[[self navigationController] popViewControllerAnimated:YES];
}
And when I click my backButton, the NSLog is correctly displayed.
But I have no idea of what to call to go back to my view. Does anyone have an idea ??
Suppose you have two controllers A and B
So if you are adding
[[self navigationController] popViewControllerAnimated:YES];
in controller B, it will only work only when you are pushed to B using proper navigation method from A.
In case of storyboard, you have to push from A to B is like
A *aCntrl = [self.storyboard instantiateViewControllerWithIdentifier:#"A"];
[self.navigationController pushViewController:aCntrl animated:YES];
In case of non-storyboard, you have to push from A to B is like
A *aCntrl = [[A alloc] initWithNibName:#"A" bundle:nil];
[self.navigationController pushViewController:aCntrl animated:YES];
In this case
[self.navigationController popViewControllerAnimated:YES];
should work.
Just check how you are navigation from A to B. It should be pushViewController and not presentViewController.
Related
How can I go back from 2nd view controller when I click on UIBarButtonItem using the custom segue?
UIBarButtonItem *backButton=[[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:#"back.png"] style:UIBarButtonItemStylePlain target:self action:#selector(back)];
I have used the following code for:
- (IBAction)back {
UIViewController *source=(UIViewController *)[self.storyboard instantiateViewControllerWithIdentifier:#"MainView"];
[self.navigationController popToViewController:source animated:YES];
}
instead of second line you can write:
[self.navigationController popToRootViewControllerAnimated:YES];
As other people say, you should use for your case:
[self.navigationController popToRootViewControllerAnimated:YES];
I want add that the method that you used, the popToViewController you should use it for to return to one specific view controller. In particular, this method pop the view controller on top of the navigation stack; you can check this and similar method for control the navigation in Apple Documentation.
I have a viewController in which, on the click of back button, I need to go to a specific viewController and call its method.So I created a barButton and added as a BACK button in navigation bar.When its selector is called I can see only see a black screen, nothing else.
Here how I am doing it.
In viewDidLoad
//Back Button in navigation Bar.
UIBarButtonItem *newBackButton = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:self action:#selector(navigationBackButtonClicked:)];
self.navigationItem.leftBarButtonItem=newBackButton;
The selector below executes and shows a black screen.
-(void)navigationBackButtonClicked:(UIBarButtonItem *)sender {
SharedManager *sharedManagerObject = [SharedManager sharedInstance];
NSString *source = sharedManagerObject.toCityString;
NSString *destination = sharedManagerObject.fromCityString;
NSString *dateStr = sharedManagerObject.dateSelected_String;
BusListViewController *buslist_VC = [self.storyboard instantiateViewControllerWithIdentifier:#"BusListViewController"];
[buslist_VC getBusListForSource:source destination:destination date:dateStr];
[self.navigationController popToViewController:buslist_VC animated:YES];
}
You need to add your buslist_VC to the view hierarchy of your navigation controller before using [popToViewController:animated:]. This is used to display some viewcontrollers already in the stack of your navigation Controller.
Either way what you're asking might be a weird behaviour for your user but you can use :
[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:self.navigationController.viewControllers.count - 1] animated:NO];
[self.navigationController pushViewController:buslist_VC animated:NO];
You cann't back to a new ViewController, you can push a new ViewController, in your code change this:
[self.navigationController pushViewController:buslist_VC animated:YES];
But keep in mind, you are putting this new viewController inside the other (where you are created a newBackButton), and the default back button come back to this. If you want to come back to the root use this:
[self.navigationController popToRootViewControllerAnimated:YES];
Or, now you can come back to any viewController on the navigation stack, this array:
NSArray *navStacks = self.navigationController.viewControllers;
Using popToViewController: be sure is in the stack.
You should use
NSArray *navStacks = self.navigationController.viewControllers;
select needed view controller and do
[self.navigationController popToViewController:selectedVC animated:YES];
Whenever I press on the 'go back' button on my final detail view, it wont go back to the table view.
I have a storyboard setup like this:
UITabViewController -> UINavigationController -> UITableView -> UINavigationController -> UIView (The detailview).
When I run my program I see the back button, but clicking it does nothing.
Here is the code for DetailViewController.m:
- (void)viewDidLoad {
[super viewDidLoad];
UIBarButtonItem *backbtn = [[UIBarButtonItem alloc] initWithTitle:#"Go Back" style:UIBarButtonItemStylePlain target:self action:#selector(gobackBtn)];
[self.navigationItem setLeftBarButtonItem:backbtn];
[self configureView];
}
- (void)gobackBtn
{
[self.navigationController popViewControllerAnimated:YES];
}
As if [self.navigationController popViewControllerAnimated:YES]; does nothing.
I'm out of ideas. Why does the backbutton not 'pop' the detailview?
Your detail view controller is the root view controller of the navigation controller. So 'popping' does nothing. You need instead to dismiss the navigation controller. Technically, you should use a delegate to tell your TableViewController to dismiss it, but I think
[self.navigationController dismissViewControllerAnimated:YES completion:NULL];
from within your goBackButton method of your detail view controller will do the trick.
I am using storyboard in my app where I have to navigate to another view controller without animation.I am successfully doing it using the custom segue.But I when I come back to the previous view controller then by using navigation bar default back button then it is animating while coming backward.So going forward it is not animating and going backward it is animating.I want to stop the default animation of the back button.
Custom Seague
// PushNoAnimationSegue.h
#interface PushNoAnimationSegue : UIStoryboardSegue
#end
// PushNoAnimationSegue.m
#implementation PushNoAnimationSegue
-(void) perform{
[[[self sourceViewController] navigationController] pushViewController:[self destinationViewController] animated:NO];
}
#end
Using this code I am successfully going to the next view controller without animation since -(void) perform is called automatically in the forward direction.When I come back it is not called.So please suggest me if there is anything wrong with the implementation or I should go with some other method.
hope this will help
1.custom button on navigation bar
UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(x,y,width,height)];
[btn setImage:[UIImage imageNamed:#"some_image.png"] forState:UIControlStateNormal];
[btn addTarget:self action:#selector(popViewController) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *backButtonItem = [[UIBarButtonItem alloc] initWithCustomView:btn];
self.navigationItem.leftBarButtonItem =backButtonItem;
and then
void popViewController()
{
[self.navigationController popViewControllerAnimated:NO];
}
If you use NavigationController then use this
[self.navigationController popViewControllerAnimated:NO];
Or
[self dismissViewControllerAnimated:NO completion:nil];
When the user pressed an 'add' button a modal view pops up for them to enter information. I have a 'cancel' button in the top left of a navigation bar and I want it to dismiss the current view controller when it is pressed. How do I set an object as the class's delegate? I understand creating protocols and implementing its methods but I cannot seem to make the delegate be set. When running the debugger my [self delegate] in the 'add' view controller is always nil.
Are you spawning the modal viewController through a segue set up in your Storyboard? If so, then in the prepareForSegue: method you would set the delegate there.
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if([identifier isEqualToString:#"userGuideSegue_home"]){
UserGuideViewController* vc = segue.destinationViewController;
[[segue destinationViewController] setDelegate:self];
}
}
On the other hand, if you are setting up the modal viewController entirely through code, then you would create an instance of the modal viewController then set it's delegate.
- (void)showModelView:(NSString*)viewName
{
// code ripped out of project so a bit specific
if ([viewName isEqualToString:#"userGuide_name"]) {
modalViewController = (UserGuideViewController * )
[[UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:NULL]
instantiateViewControllerWithIdentifier:#"UserGuide"];
}
modalViewController.delegate = self;
modalViewController.modalPresentationStyle = UIModalPresentationFormSheet;
modalViewController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
modalViewController.view.frame = [[UIScreen mainScreen] applicationFrame];;
[self presentViewController:modalViewController
animated:YES
completion:^{
//put your code here
}];
}
Of course all this assumes you have defined a delegate property on your modal viewController.
If you created the view in IB, Control-drag the button into the ViewController's header file and add an IBOutlet. Inside of that method in the .m file you can
[self dismissModalViewControllerAnimated:YES];
alternatively you can create the button programmatically:
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:#selector(processCancel:)];
-(void)processCancel:(UIBarButtonItem *)item{
[self dismissModalViewControllerAnimated:YES];
}
#interface MyViewController : UIViewController {
id delegate;
}
#property (nonatomic,retain) id delegate;
#synthesize delegate;
This should do the job, you can now use [MyViewController setDelegate:self] before showing the modal view and call [[self delegate] dismissModalViewControllerAnimated:YES] in the cancel button tapped event in MyViewController