Solved
Hey all,
I'm currently working on a Split-View Based Application for iPad. I want the Root View Controller to navigate to another TableView, and from there, the users can select the appropriate row and display the information in the DetailViewController. I managed to code the navigation part in (The Root View Controller navigates to another table instead of displaying information instantly to the Detail View Controller), but I can't seem to display information based on the user's TableView selection.
The Hierarchy of Selection is as follows:
RootViewController -->Select Row in Root View Controller --->Navigate to TableView-->Select Row from TableView-->Display in Detail View Controller
Any ideas?
Thanks.
Here was my solution, partly.
In didSelectRowAtIndexPath (delegate is my app delegate singleton):
[delegate setDetailItem:newFile];
setDetailItem:
- (void)setDetailItem:(id)newDetailItem
{
if (detailItem != newDetailItem)
{
[detailItem release];
detailItem = [newDetailItem retain];
}
detailViewController.detailItem = self.detailItem;
[self.detailViewController configureView];
}
the detailViewController has an (id) variable detailItem which i set from the row i selected. then i configure my detailview as needed based on this item. So there is a start for you.
Related
I'm having a little issue with an app I've completed. The problem is with a search view controller presented modally.
I have a search button that when tapped presents the SearchViewController modally.
I have 3 different controllers it can be presented from.
MainViewController > CollectionViewController > DetailViewController
This is actually how the controllers are in the hierarchy.
The results are always displayed on the collection view controller. Basically the collection view is refreshed and the remaining cells show are the result of the search.
Searching from collection view controller:
In the collection view controller, when the search is tapped. The search view controller is presented modally. Search text is entered and a list of matches is shown. When a row is tapped then the search view controller is dismissed and notifies the collection view controller using delegation the collection view is them refreshed with the results.
Searching from detail view controller:
In the detail view controller, when the search is tapped. The detail view controller is popped off the stack revealing the collection view controller. I use delegation to notify the collection view controller that the detail view controller was popped of the stack after the tap of a search button. Immediately the search view controller is opened making it possible to search as if we originally presented the search view controller from the collection view controller.
My issue arises when trying to search from my main view controller. Right now things are working but it doesn't have a very professional feel to it. Let me explain.
To get search working from my main view controller I use delegation. So in the method connected to the search button I perform this segue:
- (void)searchButtonTapped
{
[self performSegueWithIdentifier:#"garmentsCollectionSegue" sender:nil];
}
The protocol is defined in my interface file:
#class VAGMainTableViewViewController;
#protocol VAGMainTableViewControllerDelegate <NSObject>
- (void)mainTableViewControllerDisappearedwithTitleForObject:(NSString *)titleString;
- (void)searchButtonOnMainTableViewControllerTapped;
#end
#interface VAGMainTableViewController : UITableViewController
#property (nonatomic, weak) id<VAGMainTableViewControllerDelegate> aDelegate;
In my preparation before segue I have this:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
[self setADelegate: [segue destinationViewController]];
[[self aDelegate] searchButtonOnMainTableViewControllerTapped];
}
Here I set the delegate and also make a call to the delegate method, making the collection view controller aware of the button tap in my main view controller.
Finally in my collection view controller when the tap is detected a call to the method that presents the search view controller modally is made. Search view controller is presented.
In collection view controller
- (void)searchButtonOnMainTableViewControllerTapped
{
[self searchButtonTapped];
}
- (void)searchButtonTapped
{
VAGSearchViewController *svc = [[self storyboard] instantiateViewControllerWithIdentifier:#"searchPageSB"];
svc.delegate = self;
[self presentViewController:svc animated:NO completion:nil];
}
The search view controller notifies the collection view controller it was dismissed using delegation. This is when the querying and refresh of the collection view controller is done and the result of the search is shown.
- (void)searchViewControllerDismissed:(VAGSearchViewController*)searchViewController withTitleForObject:(NSString *)titleString
{
_searchTitleString = titleString;
[self setObjects:nil];
[self performQuery];
}
Ok so this works but it doesn't look professional because for a split second after the push to the collection view controller from the main view controller the collection view is shown before the search view controller is presented.
The feel I'm aiming for is a snappy one. So I'd prefer if the search view controller would be presented instantly.
Hopefully my detailed post give you an idea of what I'm doing.
There is a much more efficient way to do this. The problem is I can't figure it out.
Would appreciate some help
Thanks for your patience
You can do one thing did not push Collection view controller when search button is tapped.
After pushing modalviewControler if search done then you Call the delegate in MainviewController and Then push collection Viewcontroller with no animation in DelegateMethod. its look what you want
I've read every tutorial I've found about UIPageViewController, but they show just basics, I'd like to create something like new twitter app has:
UIPageViewController is embedded into Navigation controller, title of navigation bar is based on current page and those page dots are there as well, user can tap on item on current page(item from table view/collection view) to see detail.
I was able to come up with something similar, each page had collection view, and showing detail of some item was reflected in navigation bar, there was correct title and "<" button, but I wasn't able to change title based on currently shown page
Please, could you describe me how to do this in few steps/basic structure of controllers?
Don't know if you are still working on this but here goes anyway. To set up a UIPageViewController you might use the tutorial and two questions below.
http://www.appcoda.com/uipageviewcontroller-storyboard-tutorial/
How to implement UIPageViewController that utilizes multiple ViewControllers
How to add UIBarButtonItem to NavigationBar while using UIPageViewController
The last link pertains specifically to setting the contents of the navigationBar depending on what you are viewing.
The key is to create a UINavigationItem Property in the .h file of your UIPageViewController content view controllers, meaning the ones/one that are displaying whatever it is you are displaying.
From my code in FirstViewController.h SecondViewController.h and ThirdViewController.h
#property (strong, nonatomic) UINavigationItem *navItem;
In the second and third links above you'll see a storyboard layout of a Master-Detail application (which uses a navigation controller). The UIPageViewControllerDataSource is the DetailViewController. The three pages associated with the pageViewController are my content view controllers.
In DetailViewController.m you have to instantiate the contentViewControllers somewhere. At that point you pass the DetailViewControllers navigationItem id to the content view controllers. Here is how I instantiate my content view controllers using the delegate methods of the UIPageViewController.
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
{
NSString * ident = viewController.restorationIdentifier;
NSUInteger index = [_vc indexOfObject:ident];
if ((index == 0) || (index == NSNotFound)) {
return nil;
}
index--;
if (index == 0) {
return [self controllerAtIndex:index];
}else if (index == 1){
return [self secondControllerAtIndex:index];
}else if (index == 2){
return [self thirdControllerAtIndex:index];
}else{
return nil;
}
}
The delegate method calls the method below. It is almost directly from the tutorial link with just a few modifications.
-(FirstController *)controllerAtIndex:(NSUInteger)index
{
FirstController *fvc = [self.storyboard instantiateViewControllerWithIdentifier:#"FirstPageController"];
fvc.imageFile = self.pageImages[index];
fvc.titleText = self.pageTitles[index];
fvc.pageIndex = index;
fvc.navItem = self.navigationItem;
return fvc;
}
Notice that properties are passed into the view controller including self.navigationItem. Passing it in ensures you can make changes to the navigationBar items.
Then in the viewDidAppear method of your content view controller you can simply set the title on the navigation bar like this.
navItem.navigationItem.title = #"Whatever you want the title to be";
It is important to use viewDidAppear because viewDidLoad is not called every time the screen appears. I believe the UIPageViewController caches the page before and the page after whatever you are viewing which saves the system from having to load the page every time you navigate to it.
If you are using a single view controller for all you pages like the tutorial does you will have to use the index property to know what to set the title to.
Hope this helps!
I had a very similar setup and solved the problem.
My setup is that I have a UIPageViewController inside a UINavigationController because I wanted the navigation bar to be persistent while I swiped between each view controller. I wanted the title of the current UIViewController inside the UIPageViewController to become the title of the UINavigationController.
The way to do this is to implement the UIPageViewControllerDelegate method pageViewController didFinishAnimating which triggers after a change to a view controller is made from the UIPageViewController. You can probably see where this going: From here, set the navigationItem.title property of the UIViewPageController, which the UINavigationController uses to set it's own title, with that of the current view controller's title.
Example:
- (void)pageViewController:(UIPageViewController *)pageViewController didFinishAnimating:(BOOL)finished previousViewControllers:(NSArray *)previousViewControllers transitionCompleted:(BOOL)completed
{
if(finished && completed)
{
NSString *titleOfIncomingViewController = [[pageViewController.viewControllers firstObject] title];
pageViewController.navigationItem.title = titleOfIncomingViewController;
}
}
NB: This delegate method triggers only off gesture-initiated scrolls.
Solution given by Mr. Micnguyen is the exact solution but the mentioned delegate method didFinishAnimating() is called when swipe action is done due to which initially title is not shown.
Hence to resolve that problem, we need to set its initial value in viewDidLoad() method of UIPageViewController class as mentioned below:
- (void)viewDidLoad(){
self.navigationitem.title = arrayname[0];
}
I had this question too, but ended up doing something different, because I'm using Swift, so I thought I'd share here.
I ended up embedding a UIPageViewController in a Container View in my Navigation Controller. On a page swipe, I used pageViewController(_:didFinishAnimating:previousViewControllers:transitionCompleted:), with my PageViewController as the UIPageViewDelegate. From there I created a protocol that I used to send data about the VC displayed to the parent VC, and change the title using self.title = "My Title".
I didn't make the parent VC the UIPageViewDelegate because I found it to be easier to access the displayed VC from the PageViewController than from the parent VC as let childVC = pageViewController.viewControllers![0] as! DetailViewController.
First of all I don't know If controller is the right word. What I want to achieve is this.
#interface ClubViewController : CoreDataTableViewController :NRGridViewController
{
I know that this is not possible in objective-C. But is there a way to work around this?
Because I want to use CoreDateTableViewController and NRGridViewController.
Kind regards
Stef
EDIT
This is how my storyboard Hierarchy looks like.
-ViewController
-TableView
-View
-TableViewCell
So I have a tableview Controller but above this tableview controller you find a small view with three buttons. When I push on button 1 I want to take the tableview away and draw a gridView with the NRGridview Controller. But when I push on button 2 and 3 I fill up my tableview using the CoreDataTableViewController.
I hope this explains more my problem.
I think one way to do this is with a container view with a container view controller inside it. That container controller would have 2 child controllers which would be your CoreDateTableViewController and NRGridViewController. I've implemented something like this, and I can show you some code if you're interested.
After Edit: In a test app, I started with a single view template and a storyboard. I added two buttons to the top of the view and a container view to the bottom half of the view (this first controller is of class ViewController). I then dragged out a new view controller, and control dragged from the container view to the new controller and chose the "embed segue" (this will resize the view to be the same size as the container view). The class of this controller was changed to my subclass, ContainerController. I then created 2 more controllers for the 2 views that will be managed by the container controller (the views need to have their size set to "freeform" in IB so you can set the size to be the same as the container view). Here is the code in ContainerController:
- (void)viewDidLoad
{
[super viewDidLoad];
self.cont1 = [[FirstController alloc]initWithNibName:#"FirstView" bundle:nil];
self.cont2 = [[SecondController alloc]initWithNibName:#"SecondController" bundle:nil];
[self addChildViewController:self.cont1];
self.currentController = self.cont1;
[self.view addSubview:self.cont1.view];
}
-(void)switchToFirst {
if (self.currentController != self.cont1) {
[self addChildViewController:self.cont1];
[self moveToNewController:self.cont1];
}
}
-(void)switchToSecond {
if (self.currentController != self.cont2) {
[self addChildViewController:self.cont2];
[self moveToNewController:self.cont2];
}
}
-(void)moveToNewController:(id) newController {
[self.currentController willMoveToParentViewController:nil];
[self transitionFromViewController:self.currentController toViewController:newController duration:.6 options:UIViewAnimationOptionTransitionFlipFromLeft animations:^{}
completion:^(BOOL finished) {
[self.currentController removeFromParentViewController];
[newController didMoveToParentViewController:self];
self.currentController = newController;
}];
}
The only code I have in ViewController are the IBActions for the 2 buttons that switch the views. Those methods just call methods in the container controller:
-(IBAction)chooseFirstController:(id)sender {
[self.childViewControllers.lastObject switchToFirst];
}
-(IBAction)chooseSecondController:(id)sender {
[self.childViewControllers.lastObject switchToSecond];
}
What you are trying to do in your code is creating a class that is a subclass of multiple other classes, which is not possible. If you really want to do this, check out this question: Inherit from two classes
If you are trying to create multiple instances:
CoreDataTableViewController and NRGridViewController are just classes, which you will have to instantiate to get an actual object.
You can instantiate e.g. an NRGridViewController using
NRGridViewController *controller=[[NRGridViewController alloc] init];
I hope this answers your question, it is a bit difficult to understand your question.
Instead of taking tableViewController, take normal TableView (drag and drop from the storyboard to the particular position on the view).
when the button 1 is pressed Make the Table View hidden in the buttons action method. and initialize the grid view / or set grid view hidden to NO. (all views have the property of hidden in ios)
when you press on the 2nd and 3rd button set the grid view hidden and set tableview hidden equal to NO. and fetch the coredata and store it in array or dictionary or you can reload the tableview.
(Initially, before pressing the button 2 & 3 , the table view has no values. so you can set a bool property that when you press the button 2 or 3 set the bool and use the bool to reload your tabe view )
if you did not get my explanation ping me back.
I have three views each represented by a View controller named firstVC, secondVC and thirdVC. In the firstView (firstVC) I have a segmented control with three options first,second and third. When I click on the second segment control I want to load the corresponding view controller which in this case would be secondVC. I am new to View Controllers but I did try various options. I created an outlet and also a value changed event. I event tried pushing a view controller when the value changes but it pulls a blank page as opposed to secondVC.
Please see below for the code.
- (IBAction)chainAction:(id)sender {
UINavigationController *navcon = self.navigationController;
if (chainSegControl.selectedSegmentIndex == 1) {
secondVC *atSecondVCChain = [[secondVC alloc] init];
[navcon pushViewController:atSecondVCChain animated:YES];
}
}
Any help would be greatly appreciated. Thank You.
P.S I am using Xcode 4.2
Instead of using alloc to create a controller, define a named segue in your storyboard (if you don't already have one) that describes a push from firstVC to secondVC and then use the performSegueWithIdentifier:sender: method instead of pushViewController:.
I have a navigation controller with a tableview controller as the first controller, however when the database is empty I want to show the user a view that asks the user for some information to fill the database and show it in the navigation controller instead of the view assigned in storyboard, I guess I would have to do this programmatically, but I'm new to iphone development and honestly dont know where to start.
Here's how you can do it. Create a new scene in your storyboard for your view controller where the user will submit the info (let's say it's called CollectInfoViewController). Then create a modal segue from your tableview controller to the CollectInfoViewController. In the Attributes Inspector, set the Identifier property of the segue to "CollectInfo" so you can identify it later.
Then when your tableview controller's viewDidLoad method runs, ask the table view delegate whether there are any rows to show. If there are not, programmatically perform the segue to your CollectInfoViewController.
- (void)viewDidLoad
{
[super viewDidLoad];
if ([self.tableView.dataSource tableView:self.tableView numberOfRowsInSection:0] == 0) {
[self performSegueWithIdentifier:#"CollectInfo" sender:self];
}
}
In your CollectInfoViewController, once the user has entered the information and you have stored it in your database then you can call the following from within CollectInfoViewController to dismiss that view. This will return the user to the tableview.
[self dismissModalViewControllerAnimated:YES];
Finally, back in your tableview controller, you might need to reload your table with the new data that's been collected. You can do that in viewWillAppear, which will be called when the modal view controller is dismissed.
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.tableView reloadData];
}