I have an UIViewController, this controller is contained in a navigationController.
I add an UITableViewController in this viewController. I would like to call a pushViewController method when I press on a cell of my tableView.
I tried this :
UITableViewController
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
FirstView *myViewController = [[FirstView alloc] init];
[f myViewController];
}
UIViewController (FirstView)
-(void)pushIt
{
SecondView *sCont = [[SecondView alloc] initWithNibName:#"SecondView" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:sCont animated:YES];
NSLog(#"didSelect"); // is printed
[sCont release];
sCont = nil;
}
But nothing happen. I put NSLog() to my pushIt method and I can see it. So I don't understand why I can't push it.
Any idea?
UIViewController has a property named navigationController that will return a UINavigationController if one exists for the view controller its called from.
Using this property, you can push view controllers onto the navigation stack from your table view's didSelectRowAtIndexPath: method.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
SecondView *sCont = [[SecondView alloc] initWithNibName:#"SecondView" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:sCont animated:YES];
[sCont release];
}
The reason your current code isn't working is probably because of the following:
You already have an instance of FirstViewController, as you said you have added a table view as its subview
You try and create a new instance of a FirstViewController when the user taps a cell, which isn't on the navigation stack, so trying to push a view controller onto the stack from there doesn't work, because the navigationController property returns nil.
You alloc and init myViewController but never push it to navigation or window or whatever else, then you push sCont to myViewController, that isn't present at window. First, try not using myViewController, next try to push myViewController to navigation before pushing sCont into it.
Related
I'm using JTRevealSidebar V2 with UITableView on the left slide bar.
I don't know how to push to other ViewController by sending a message.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
if (self.sidebarDelegate) {
NSString *text = [self.leftList objectAtIndex:indexPath.row];
if ([text isEqual:#"Warenkorb"]) {
NSLog(#"Ist warenkorb");
// How to push/create/bring2top view of msCartViewController Identified by "Cart"?
// NSLog works
}
}
}
How can this be done?
In your rootviewcontroller, you would allocate a new UIViewController and then push it onto the UINavigation stack.
For example:
UIViewController *myViewController = [[UIViewController alloc] init];
myViewController.title = #"My First View";
myViewController.view.backgroundColor = [UIColor redColor];
//to push the UIView.
[self.navigationController pushViewController:myViewController animated:YES];
Remember to do this in your root view controller!
Hope this helps.
Maybe, your problem is how to get an instance from storyboard, as I see you call your msCartViewController "Cart" in storyboard.
Or Maybe you cannot get your navigation controller for pushing.
For first Problem
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle: nil];
msCartViewController* vc=[storyboard instantiateViewControllerWithIdentifier:#"Cart"];
For Second Problem, you need to store your navigation controller pointer to someplace you can visit, like in a dictionary property in a singleton. just like
// at first make a singleton with a dictionary property. here I call it YourNavigationCenter
UINavigationController *navigationController = [YourNavigationCenter sharedCenter].navigationDictionary[#"yourNavigationName"];
[navigationController pushViewController:self animated:YES];
If these solution have not catch your point, please make a comment.
I am having an app which has a UITableViewController which is my settings page. I am pushing the UITableViewController with a presentModalViewController using self.navigationController (using storyboard ID). however each time I try to see that page, it's showing exception. After reading few posts I tried implementing two methods
- (NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section
{
return 3;
}
- (UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [super tableView:tableView
cellForRowAtIndexPath:indexPath];
return cell;
}
**my .h File**
#interface Setting : UITableViewController<UITableViewDelegate,UITableViewDataSource>
I have done all UI settings in IB so I didn't change anything in above two implemented methods.
In mainviewcontroller from where I am pushing the view to UITableViewController, I am using the below code
Setting *nextController = [[self storyboard] instantiateViewControllerWithIdentifier:#"setting"];
[self presentModalViewController:nextController animated:YES];
Setting *dvc = [[Setting alloc] init];
[self.navigationController pushViewController:dvc animated:YES];
As I already set all UIs in IB why do I need to implement those methods? At least I can seen the view correctly.
It looks like you're trying to initialize the same viewController twice. You don't need to alloc] init] after you instantiateViewControllerWithIdentifier. At least, from my experience you don't. Try this:
Setting *nextController = [[self storyboard] instantiateViewControllerWithIdentifier:#"setting"];
[self.navigationController pushViewController:nextController animated:YES];
That will "push" the nextController with the storyBoardID of "setting" from the right into your existing NavigationController.
However, using my intuition, I believe you want to present a settings view modally, that has it's own NavigationController. In that case, try this code, which wraps the Settings ViewController into a NavigationController, and presents that whole thing modally, so you can navigate within settings:
Setting *nextController = [self.storyboard instantiateViewControllerWithIdentifier:#"setting"];
UINavigationController *navcont = [[UINavigationController alloc] initWithRootViewController:nextController];
navcont.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentViewController:navcont animated:YES completion:nil];
Alternatively, you could do all of this in the Storyboard itself. Select your settings view controller, and go to Editor Menu > Embed In... > Navigation Controller. Then make a segue from your button to the navigation controller that holds the settings controller. Set the segue to "Modal" and you're all done.
I'm building an iPhone app, with the following structure:
I have the MainViewController which consists of 2 views (like split screen).
The first view of them, has a button. On tap, a UItableView (ResultTableViewController) appears in the second (of the above) view:
-(IBAction)buttonTapped:(id)sender {
if ([(UIButton *)sender tag] == 0) {
ResultsTableViewController *childViewController = [[ResultsTableViewController alloc] init];
childViewController.tableView.delegate = self.results;
[self.results.view addSubview:childViewController.tableView];
}
}
So I have a UItableView as a sub-view of a UIView.
The problem is that pushViewController() in didSelectRowAtIndexPath() of ResultTableViewController does not work (self.navigationController is nil).
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
DetailsViewController *detailView = [[DetailsViewController alloc] initWithNibName:#"DetailsViewController" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:self.detailView animated:YES];
}
I have tried many of the solutions I found, but nothing works.
In my MainWindow.xib, I have only MainViewController added, is that the problem?
Thanks in advance!
You are adding the view of the child controller to your controller's view, not pushing the child controller onto your navigation stack. Due to that, your child controller's navigation controller will be nil, since it wasn't put into the navigation controller.
Is this what you're going for?
-(IBAction)buttonTapped:(id)sender {
if ([(UIButton *)sender tag] == 0) {
ResultsTableViewController *childViewController = [[ResultsTableViewController alloc] init];
childViewController.tableView.delegate = self.results;
[self.navigationController pushViewController:childViewController animated:YES];
}
}
[self.navigationController pushViewController:self.detailView animated:YES];
above line of code will push the detailview on navigationcontroller stack. Check whethere your tableviewcontroller is on that stack ?
Ok, I found it.
I had to declare my MainViewController as UINavigationControllerDelegate and create a secondary NavigationController in it. I push the viewController in my new navigationController and that's it.
I have a class called CataloguesEtTarifsPDFViewController which displays a tableView.
Now, inside this class I wanna create a UINavigationController and set the root of the UINavigationController this class:
Here is what I did:
CataloguesEtTarifsPDFViewController.h
UINavigationController *navigationController;
in the implementation file
CataloguesEtTarifsPDFViewController.m
- (void)viewDidLoad
{
CataloguesEtTarifsPDFViewController *catalog =[[CataloguesEtTarifsPDFViewController alloc] init];
loadingView.hidden=YES;
navigationController = [[UINavigationController alloc] initWithRootViewController:catalog];
}
When I click on the table cell I do this:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
WebViewController *webViewController = [[WebViewController alloc] init];
[self.navigationController pushViewController:webViewController animated:YES];
[navigationController release];
}
But when I run and click on the tableView nothing happens...not view is showed up!!!Where am I going wrong?
IMPORTANT: I don't have a delegate file.Only CataloguesEtTarifsPDFViewController.h CataloguesEtTarifsPDFViewController.m and CataloguesEtTarifsPDFViewController.xib.
EDIT:
- (IBAction)showViewCataloguesEtTarifsPDF:(id)sender{
// Remove view to middleView
[mainMenuViewController removeViewsToMiddleView];
// create view controller
cataloguesEtTarifsPDFViewController = [[CataloguesEtTarifsPDFViewController alloc] init];
cataloguesEtTarifsPDFViewController.mainMenuViewController = mainMenuViewController;
// hide/show header button
[mainMenuViewController.headerViewController showMainMenuButton];
// highlight footer tabbar button
[mainMenuViewController.footerViewController.footerTabBar setSelectedItem:mainMenuViewController.footerViewController.footerTabBarItemMyAudi];
UINavigationController* navigationController = [[UINavigationController alloc] initWithRootViewController:cataloguesEtTarifsPDFViewController];
[self presentModalViewController:navigationController animated:YES];
}
You should probably read this: http://www.iosdevnotes.com/2011/03/uinavigationcontroller-tutorial/
Or this: http://developer.apple.com/library/ios/#featuredarticles/ViewControllerPGforiPhoneOS/Introduction/Introduction.html#//apple_ref/doc/uid/TP40007457-CH1-SW1
Or watch this: http://peepcode.com/products/iphone-view-controllers-part-i
That'll give you the basics and you'll be well equipped to answer your question and fix your code :)
PS: You don't have to explicitly create and set a UINavigationController in your view controller. If the view controller is embedded within a navigation controller, the navigationController property of your view controller instance will automatically find it and return it.
What you're doing in viewDidLoad is wrong.
Wherever you are showing the CataloguesEtTarifsPDFViewController, you should wrap it in a UINavigationController there and show the UINavigationController instead.
This will make sure the navigationController property of UIViewController will be set.
In your tableView:didSelectRowAtIndexPath: method you should release the webViewController variable instead of the navigationController property.
I'm currently trying to spawn a new instance of the same view - using the following code:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
InventoryController *inventoryController = [[InventoryController alloc] initWithNibName:#"InventoryView" bundle:nil];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:self];
[navigationController pushViewController:inventoryController animated:YES];
[inventoryController release];
[navigationController release];
}
Problem is that it's not working...
I don't get any errors or anything - it just doesn't do anything.
Any ideas?
#PengOne has it right... you're creating a navigation controller and then releasing it, and there's nothing to prevent it from being deallocated. Additionally, you haven't added the nav controller's view to the window, and you haven't set the nav controller as the window's root view controller, so there's no way for the views controlled by controllers in this particular navigation stack to ever be seen.
Try this: Create a navigation-based project in Xcode. You don't need to add any code -- just create the project so that you can look at the code that's provided. You'll see that the app delegate has a retain property for storing the nav controller, and the nav controller is set as the window's root view controller.
If your current controller is already a part of UINavigationController hierarchy then you must not create a new navigation controller - use the existing one instead (note that every UIViewController has a reference to its parent UINavigationViewController if it exists):
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
InventoryController *inventoryController = [[InventoryController alloc] initWithNibName:#"InventoryView" bundle:nil];
[self.navigationController pushViewController:inventoryController animated:YES];
[inventoryController release];
}