I am trying to move to UITableView named Cart from UIView by clicking on right bar button item , the button action event i wrote
Cart *crtObj=[[Cart alloc]initWithNibName:#"Cart" bundle:nil];
[self.navigationController presentModalViewController:crtObj animated:YES];
[crtObj release];
And from the same Bar by clicking on left bar button i am navigating previous tableView which works properly, the code for the same is
self dismissModalViewControllerAnimated:YES];
I tried a lot please suggest something?
//[self.navigationController presentModalViewController:crtObj animated:YES];
//presentModalViewController
try this
[self.navigationController pushViewController:crtObj animated:YES]
I wonder why u have to use [self.navigationController presentModalViewController]
but not [self.navigationController pushViewController:crtObj animated:YES].
They are different.
[self.navigationController presentModalViewController:ControllerA] will simply pull up a view of ControllerA from the bottom of ur screen. ControllerA will not be related the controllers those u are navigating along. (I am not sure if this method works)
[self.navigationController pushViewController:ControllerA animated:YES] will push ControllerA to the navigationController and it's stored with the controllers those u are navigating along in sequence.
i suggest using the second one because the structure of ur apps will be simpler.
but if u still want to use the first way. Maybe you can try like this:
Assume u have now navigated to ControllerA, and wanna show up Controller B
call [ControllerA presentModalViewController:ControllerB] instead
Related
I have looked around but haven't found a satisfying answer. My problem is that whenever I call popToRootViewControllerAnimated:(BOOL) it is not doing anything. When I NSLog it, it logs (null).
Let me back up a bit here. I have a table view controller that has a list of things, at the navigation bar up top there is an option to add and that takes me to a new view controller with a segue "Present as PopOver" which gets rid of the principal or main navigation bar. So I made one manually and added 2 bar button items "Cancel" and "Add". When "Cancel" is tapped, it should take the user back to the table view controller and discard changes, when "Add" button is tapped, it should also take user back to the previous table view controller with the changes. But it's not doing anything.
Here is my code.
- (IBAction)cancelButton:(UIBarButtonItem *)sender {
UINavigationController * navigationController = self.navigationController;
NSLog(#"%#", navigationController);
NSLog(#"cancel tapped though");
ListingTableViewController *rootController = [[ListingTableViewController alloc] init];
[navigationController popToRootViewControllerAnimated:NO];
[navigationController pushViewController:rootController animated:YES];
}
As far as the segue, this view controller is not connected to anything, or should I connect it? This is a noobish question indeed. Here is my xcode screenshot.
Check this link for the screenshot of the storyboard
http://i.stack.imgur.com/lqnCF.png
You must call
- (IBAction)cancelButton:(UIBarButtonItem *)sender {
NSLog(#"cancel tapped though");
[self dismissViewControllerAnimated:YES completion:nil];
}
instead of popToRootViewControllerAnimated because your VC presented and not pushed!
When presenting a view, you are not pushing it in your navigation controller, but having it presented. To dismiss it, try using [self.presentingViewController dismissViewControllerAnimated:NO completion:nil].
I am a beginner in iOS programming and I want to implement the functionality of going back to home view.
I have use this code:
-(IBAction)onclickhome:(id)sender
{
[self.navigationController popViewControllerAnimated:YES];
}
I have used navigationController in home button click event but it is not jump to home screen.
Do you have any suggestion and source code which applies to my code?
I'm not sure I understand your question.
What do you mean with
I have used navigationController in home button click event but it is
not jump to home screen
?
If you want to pop to the root controller you can use popToRootViewControllerAnimated.
[self.navigationController popToRootViewControllerAnimated:YES];
From Apple doc of UINavigationController
popToRootViewControllerAnimated:
Pops all the view controllers on the stack except the root view controller and updates the display.
- (NSArray *)popToRootViewControllerAnimated:(BOOL)animated
If you have set up a UINavigationController and its root controller is called A, then if you navigate from A to B and then from B to C you have two possibilities to come back to a previous controller (you can have others but I list the main ones):
navigate back from C to B with popViewControllerAnimated
navigate back from C to A with popToRootViewControllerAnimated
The best way to navigate back and forth views is by pushing and popping views from navigation view controller stack.
To go one view back, use below code. This will ensure that the smooth transition between views are retained.
UINavigationController *navigationController = self.navigationController;
[navigationController popViewControllerAnimated:YES];
To go two views back, do as below
UINavigationController *navigationController = self.navigationController;
[navigationController popViewControllerAnimated:NO];
[navigationController popViewControllerAnimated:YES];
If you aren't going back to your expected view, execute below code before popping any of the views...
UINavigationController *navigationController = self.navigationController;
NSLog(#"Views in hierarchy: %#", [navigationController viewControllers]);
You should see an array like the below one, which will help you in verifying the stack is maintained as expected.
Views in hierarchy: (
"<Main_ViewController: 0x1769a3b0>",
"<First_ViewController: 0x176a5610>",
"<Second_ViewController: 0x176af180>"
I use
[self dismissViewControllerAnimated:YES completion:nil];
since others answers didn't worked in Xcode 8.0
I have 2 ViewControllers directly connected with a push segue. I am navigating from first to second view controller by calling [self performSegueWithIdentifier:#"segueIdentifier" sender:sender]. On the second one I have an IBAction method that is bound to a "Done" button. Pressing that button should basically cause the first view controller to be displayed (sort of a back button). I managed to do that with:
NSArray *viewControllers = self.navigationController.viewControllers;
[self.navigationController popToViewController:[viewControllers
objectAtIndex:0] animated:YES];
I did try to achieve the same effect by using:
[self dismissViewControllerAnimated:YES completion:nil];
No matter what I tried though this didn't do the job. I am trying to understand what exactly am I missing but I can't figure it out. Does dismissViewControllerAnimated method work only with Modal segues ( this is the only thing that came to mind ).
Thank you
Yes,
- (void)dismissViewControllerAnimated:(BOOL)flag completion:(void (^)(void))completion
is when a UIViewController is displayed modally.
- (UIViewController *)popViewControllerAnimated:(BOOL)animated
should do what you are seeking.
So basically, in your second VC:
[self.navigationController popViewControllerAnimated:YES];
You will save you a lot of trouble if you read the UIViewController and UINavigationController references. Twice ;)
I have a problem about viewController. I created a program What is viewController based applicaiton. There is 4 button on mainViewController. I used this code for calling mainviewController
-(void) applicationDidFinishLaunching:(UIApplication *)application{
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
}
Then click to any button on homePage , I go to the other viewController. This code for call another viewController belong
-(IBAction)clickCalendarButton{
calendarButton.selected=YES;
[calendarButton
setImage:[UIImage imageNamed:#"afvalkalender_pressed.png"] forState:(UIControlStateHighlighted+UIControlStateSelected)];
GarbageCalendar *garbageCalendar = [[GarbageCalendar alloc] initWithNibName:#"GarbageCalendar" bundle:nil];
[self presentModalViewController:garbageCalendar animated:YES];
}
And then I want to go home page from another viewController. But I didn' go home page viewController.
Create button on detail view controller, which calls something like this:
- (IBAction)goBack {
[self dismissModalViewControllerAnimated:YES];
}
If you want to keep your current UI design, based on modal view controllers, then I think you should ensure that your other view controllers have got a button that does the dismiss of the view. Say, e.g., a "Back" or "Done" button. When you click on that button, a delegate method is called that executes: [self dismissModalViewControllerAnimated:YES];
Look also at this document for more info, section "Dismissing a Modal View Controller".
If you would like to consider alternative approaches to your UI, you could look into using a UINavigationController, which would make your life a little bit easier with navigating back from one controller to another.
i am designing an app that has a login screen. it is a UIView with username/password and a button to submit. once the user authenticated successfully, i want to load a new xib file that holds a navigation controller and a navigation bar. below the bar i want to load a tableView and switch between other views as i move along with the programming of it.
what i did is create a new class that inherits from UINavigationController and assembled the xib file to include the navigation controller. i hooked it back up to file's owner and i'm loading the navigation controller modally like this:
myNavController* navVC = [[myNavController alloc] initWithNibName:#"navXibFile" bundle:nil];
[self presentModalViewController:navVC animated:YES];
[navVC release];
this works okay as the navigation controller shows up. however, it shows up with no title, even though i've set one up in IB. moreover, the tableView's delegates are hooked up via IB but i cannot even see empty lines. all i see is an empty navigation bar at the top and blank view (one piece) below it.
thank you for your help.
so i figured it out... first it's a design decision right? is the app being managed by a navigation controller? if so (which is my case), expect the main (first) view, that is a login page, all you need to do is to hide the navigation bar in your ViewdidLoad for the main view:
[self.navigationController setNavigationBarHidden:YES animated:YES];
once the user logs in and you push the next view like this:
MainTableViewController* mainTableVC = [[MainTableViewController alloc]
initWithNibName:#"MainTableViewController" bundle:nil];
[self.navigationController pushViewController:mainTableVC animated:YES];
[mainTableVC release];
and lastly, in the ViewDidLoad of the next view controller:
[self.navigationController setNavigationBarHidden:NO animated:YES];
in case your app needs a navigation controller for a specific section of the app but not all if it, you will need to use the VC to manage this, in a similar way the appDelegate manages the sample navigation based sample app.
i hope this helps anyone struggling with wrapping their minds around the design patterns implemented here.
cheers.