Self shows "0 objects" in debugger - ios

Question

I am an iOS noob.
I am having a problem similar to this:
"self" object for UIViewcontroller has #"0 objects" in debug window in xcode
Re-starting xcode does not solve the problem.
I can see the self object in the view controller after a segue from my main view controller. I have a UITableViewController inside that view controller, with a separate class for delagete/data source for the table. Once i get into this tableviewcontroller code, the self object shows "0 objects" in the debugger. I believe that I am initializing the table view incorrectly to cause this problem somehow, but not quite sure how.
Thanks for the help. My code is below.
#implementation ConnectTableController
#synthesize perpArray;
#synthesize nameArray;
+ (ConnectTableController *)connectTableController
{
return [[ConnectTableController alloc] init];
}
- (void)viewDidLoad {
[super viewDidLoad];
perpArray = [[NSMutableArray alloc] init];
nameArray = [[NSMutableArray alloc] init];
}
....
#interface ConnectTableController : UITableViewController <UITableViewDelegate, UITableViewDataSource> {
UITableView *tableView;
NSMutableArray* perpArray;
NSMutableArray* nameArray;
}
+ (ConnectTableController*) connectTableController;
#property (nonatomic, strong) NSMutableArray *perpArray;
#property (nonatomic, strong) NSMutableArray *nameArray;
...
// Parent view controller code
#implementation ConnectVC
- (void)viewDidLoad {
[super viewDidLoad];
// Set the controller delegate/dataSource for the Table
connectTableController = [[ConnectTableController alloc] init];
connectTable.dataSource = connectTableController;
connectTable.delegate = connectTableController;
[self addChildViewController:connectTableController];
}
...
#interface ConnectVC : UIViewController{
IBOutlet UIButton *CONNECT;
ConnectTableController *connectTableController;
IBOutlet UITableView *connectTable;
}

Answer 1

The following applies to UITableViewControllers as well, make sure you are accessing the views properly
"Self" for a viewController doesn't contain the views, you have to check "self.view.subViews", "Self.view.subViews" contains the views for the viewController, not just "self" alone.
for example, if Self is a UIViewController then the following will crash your app with the corresponding error:
for(UIView * a in self)
{
NSLog(#"%#", a.description);
}
error:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController countByEnumeratingWithState:objects:count:]: unrecognized selector sent to instance 0x7f854176fbf0'
It crashes because "self" of uiviewController doesn't contain the views
BUT if you try this, then you will have something to work with:
for (UIView *s in self.view.subviews) {
NSLog(#"%#", s);
}
this will log to console all the views in the UIViewController, thereby allowing you to access the views
Also, it looks like you may be trying to access the views of "connectTableController". To access this controller's views then here's how it works:
connectTableController.view.subViews.
UITableViewController * aaa = [UITableViewController new];
aaa.tableView;
aaa.view;
aaa.view.subviews;
So, this means you are going to access the following:
connectTableController.tableView
connectTableController.view.subViews
and then from there, you can do this:
connectTableController.tableView.subViews
.. that is of course if the subviews you are looking for are subviews of the UITableViewController's tableView
In addition, I think the way you are doing the placement of a UITableViewController is OKAY, but probably not the best choice, only because it gets a little complicated and it's not as easy as adding it as a child like that in order to make this work. You should be using something like this:
tester2 = [UITableViewController new];
[self addChildViewController:tester2];
[self.view addSubview:tester2.view];
[tester2 didMoveToParentViewController:self];
then of course you should combine this method when/if you want to remove the child view controller
- (void)hideContentController:(UIViewController*) content
{
[content willMoveToParentViewController:nil];
[content.view removeFromSuperview];
[content removeFromParentViewController];
}
This will hopefully give you a start, so also try this:
- (void)viewDidLoad {
[super viewDidLoad];
// Set the controller delegate/dataSource for the Table
connectTableController = [[ConnectTableController alloc] init];
connectTable.dataSource = connectTableController;
connectTable.delegate = connectTableController;
[self addChildViewController:connectTableController];
[self.view addSubview:connectTableController.view];
[connectTableController didMoveToParentViewController:self];
}
Also, I don't know that you need to do anything with delegation declaration since the child view controller is basically it's own little world within a world. Try it with and without these lines:
connectTable.dataSource = connectTableController;
connectTable.delegate = connectTableController;
What I mean, is possibly declare these in the UITableViewController instance or make sure you are adding the "connectTable to the the UITableViewController, something like this:
cconnectTableController.tableView = connectTable;
or
[cconnectTableController setTableView:connectTable];
then you can try this
connectTable.dataSource = cconnectTableController;
etc, etc.
Try this for loop and list the results
for (id s in self.view.subviews) {
NSLog(#"%#", s);
}