I'm using iPhoneCoreDataRecipes sample as as base code for my project and there is one thing that I was not able to modify. Also, I'm not quite sure if it is even possible.
I would like to modify the table that displays recipes (the first one). Right now the table gets the data from recipeListControllerand by default it covers the whole screen. I would like to change that. I still want to build a table with recipes data but I'm planning to shrink the table and modify its look.
I guess table view controller is created in the mainWindow.xib.
Normally when I'm creating tables, I'm inserting them into UIViewController in the interface builder and then I use UIViewController <UITableViewDelegate, UITableViewDataSource> in my class.
Here are the bits that I think I need to modify:
#interface RecipeListTableViewController : UITableViewController <RecipeAddDelegate, NSFetchedResultsControllerDelegate> {
to something like this:
#interface RecipeListTableViewController : UIViewController <RecipeAddDelegate, NSFetchedResultsControllerDelegate, UITableViewDelegate, UITableViewDataSource> {
and then after creating UIView Controller in MainWindow.xib I think I need to hook it up with recipeListController. Inside of this UIView, I want to have a custom table, which then should use recipe data. Unfortunately I get errors...
I would appreciate any suggestions. Here is the project that I used:
http://developer.apple.com/library/ios/#samplecode/iPhoneCoreDataRecipes/Introduction/Intro.html
My suggestion : create a uiview below the table view, then put the table view as a subview of that view, and then you can manage its size as being not full screen. The underlying view is mapped to the RecipeListTableViewController.view outlet, you probably need to create another one for the table view (just to call [tableView reloadData] for example). The delegate and data source of the table view point as well to RecipeListTableViewController. By experience this will work.
Related
I have many viewcontrollers which needs to have some common functionality related to navigation.
Earlier I made a base class BaseViewController(extending UIViewController) which have all common functionality (like doing some tasks on viewDidLoad etc) and all my viewcontrollers extends BaseViewController.
The problem is that some of my viewcontroller should be subclass of UIViewController and some of UITableViewController, so I can not use above approach.
One way could be to write base class for both and duplicating code. Is there any better way without duplicating code.
While you can get around this by using delegation or helper objects, I would make the case for just not using UITableViewController. It is only a very light subclass on top of UIViewController, providing a table view, conforming to the delegate & data source protocols, and adding a property or two for selection & refresh.
While I wouldn't normally suggest recreating something that the framework has already done for you, it may (in your case) make your code more easy to understand if you just keep everything inheriting from a common base class and add a table view to one of the subclasses.
If you do think this would be a reasonable approach, the UITableViewController documentation overview gives a detailed description of exactly what & where these behaviours are implemented, so mimicking its exact setup is trivial.
Adding a table view to UIViewController
#interface ViewController : UIViewController <UITableViewDataSource, UITableViewDelegate>
#property (nonatomic, strong) IBOutlet UITableView *tableView;
#end
In your storyboard, drag a "Table View" from the object library and drop it on top of your View Controller scene's "View" in the Document Outline - this will replace the root view with a UITableView.
Then just hook it up:
ctrl-drag from the view controller to the table view to hook up the view and tableView outlets
ctrl-drag from the table view to the view controller to set the delegate and dataSource outlets.
Done - no magic required.
I am an Objective-C beginner and I am going through the tutorial to create an IOS app using Apple developer articles.
https://developer.apple.com/library/ios/referencelibrary/GettingStarted/RoadMapiOS/SecondTutorial.html#//apple_ref/doc/uid/TP40011343-CH8-SW1
I have created an unwind segue and I have gotten stuck. I have gone through SO posts such as given below
StoryBoard issue in Xcode 6.1
Change a UIViewController to a UITableViewController inside a storyboard?
Want to create a cool static UI but : "Static table views are only valid..."
I tried to modify the story board source to use "tableViewController" instead of "viewController", but the storyboard won't open.
I am sure that there is an easy solution, but I don't know enough Objective-C or IOS development to know what it is, or how to implement it.
I have my controller implementing UITableViewController and my view as UITableView. I have attached the screenshot below.
and the error message:
My source for ToDoListTableViewController.h is given below:
#import <UIKit/UIKit.h>
#interface ToDoListTableViewController : UITableViewController
- (IBAction)unwindToList:(UIStoryboardSegue *)segue;
#end
and the implementation
#import "ToDoListTableViewController.h"
#interface ToDoListTableViewController ()
#end
#implementation ToDoListTableViewController
. . . Other methods
- (IBAction)unwindToList:(UIStoryboardSegue *)segue {
}
#end
Your picture is kind of small so it's a bit hard to tell what we're looking at. Plus your descriptions are a bit vague.
The deal is that in order to set up a table view as a static table view, it must be managed by a UITableViewController, not a regular UIViewController.
A UITableViewController is a special subclass of UIViewController. When you go to add a new scene to your storyboard, you go to the list of UI objects, find the UITableViewController, and drag one onto the storyboard.
An annoying thing about UITableViewController objects is that the ONLY thing they manage is a table view. You can't use them to set up labels, buttons, and other UI elements. Just a table view and nothing else.
You said:
'I tried to modify the story board source to use "tableViewController" instead of "viewController"...'
I have no idea what that means. What is a "story board source"? You don't "Modify the storyboard source", you drag a UITableViewController onto your storyboard.
Then you said "...but the storyboard won't open." I also don't know what that means. You're going to have to explain that.
Luckily, there is an easy solution to this.
What you want to do is to create a regular UIViewController to manage everything but the table view, and then put a "Container View" in that view controller and set up an "embed segue" that installs a UITableViewController inside that container view.
Here's how you do that:
Search in the list of UI elements on the right side for "container". Drag a container view onto your view controller where you want your table view to appear. Then drag a UITableViewController onto a blank space on your storyboard to create a new storyboard scene. Then control-drag from the container view in your first view controller onto the UITableViewController. This creates an embed segue, which causes the UITableViewController to be loaded as a child view controller with its view inside and sized to fit in the container view.
Now you can have a window that has both a table view managed by a UITableViewController AND other contents.
There are more details to setting this up that are beyond the scope of a SO post. I suggest you do some googling on container views and embed segues and try to find a tutorial on setting them up.
I'm currently learning Objective-C by doing tutorials ("the iOS Apprecente")
Now I need to make a checklist
I added in viewController.h
#interface ViewController : UITableViewController
Normal there stands
#interface ViewController : UIViewController
The next is to go to Storyboard place there a TableViewController, give it the name: ChecklistsViewController (Identity inspector > Custom class > class.
I added a label into the first Table view cell. But when I run it there's nothing.
What to do?
Two separate issues here:
The choice of UIViewController with your own IBOutlet for the table view or a UITableViewController is simply a question of whether, in Interface Builder (IB), you added a standard view controller to which you added a table view, or whether you used a table view controller. You use the former if you have other controls on the view in addition to the table view. You'd generally use the latter if the table view is the only thing being presented in that view controller's view. Bottom line, your choice of UIViewController or UITableViewController is dictated by how you added the scene in IB. From your description, it sounds like you went down the UITableViewController approach, which is fine.
In terms of why you're not seeing anything, there are a bunch of possible reasons:
Did you specify the cell identifier for your table view cell prototype? Is it the same identifier you're using in cellForRowAtIndexPath method?
If you manually added a table view to a standard view controller's view, did you specify the view controller as the delegate and dataSource for the table view? Also, did you create an IBOutlet for the table view itself, hooking that up in IB? (If you used a table view controller in Interface Builder, you don't have to do these steps.)
You might want to double-check that the base class for the table view controller was correctly set in IB.
Did you implement all of the UITableViewDataSource methods, notably numberOfRowsInSection? If you don't do that, it will conclude that there are no rows, and no cells will be generated.
You say that you specified the base class for your view controller in IB to be ChecklistsViewController. But in your code snippets, it looks like you're using a custom class called ViewController. Make sure you're using the same UITableViewController subclass for both.
I'm trying to make an interface like this one:
But I get the following error in XCode: Illegal Configuration: Static table views are only valid when embedded in UITableViewController instances
That controller is a subclass of UITableViewController, so I don't really understand what the problem is, any insight?
First of all, I think you're saying that ProfileViewController is a subclass of UITableViewController. If that is the case, the top level view should be a UITableView not just a UIView. And the error does make sense. If you want to create a static table view, it needs to be embedded in it's own UITableViewController, which is what you get when you drag a UITableViewController from the Palette to the storyboard.
Amended to answer question in comments
So starting from scratch. Drag a TableViewController onto your storyboard and change the class to ProfileViewController. That gives you your tableview with the prototype cells. Then drag an empty view to near the top of the TableView. This will add a headerview to the tableView. (Every tableview has a subview for a header and a footer. This is different than the section headers). Now make that header view taller and drag your other elements into it: the segmentedButton, the search field. Drag your UIImage View. then drag another tableview and position it next to the image view.
Now create a subclass of NSObject NOT NSTableViewController like so.
#interface MiniTableViewController : NSObject <UITableViewDelegate, UITableViewDataSource>
And put the datasource and delegate methods for that minitableview in there. Back on the story board, drag an object to the hierarchy change the class to your MiniTableViewController, and connect the delegate and datasource outlets from your minitableview to the MiniTableViewController in the hierarchy. Make sure you're using the assistant view. Then ctrl-drag from the MiniTableViewController object to the ProfileViewController.h (right before #end) and create an IBOutlet. Now you can access your new custom object from ProfileViewController. You can also create an IBOutlet in MiniTableViewController and connect it to ProfileViewController if you need MiniTableViewController to send messages to ProfileViewController.
A UITableViewController can only have one Table View. You have two. You have to find another way to do it.
Have you put a UITableView in your xib ?
If yes, have you bind this UITableView to your controller?
I have a main home screen in my app which I am eventually hoping to contain a table view in the centre. When a button is pressed, the table view flips to a map view.
I would do this as part of the main view, but I want the surrounding area to stay the same. I have dragged a view into the centre of the homepage view controller, and have set up my table view there. How do I access the data in this view?
As far as I'm aware, there is no way of setting a tableviewcontroller to it. Any help would be greatly appreciated.
You can make whatever View Controller is in charge of the views conform to UITableViewDelegate and UITableViewDataSource protocols in your header (.h) file:
#interface YourViewControllerClass : UIViewController <UITableViewDelegate, UITableViewDataSource>
And then implement the appropriate methods in your implementation (.m) file.
If you're using IB, drag the TableView's datasource and delegate outlets to your view controller subclass.