UIRefreshControl issues - iphone

Question

I am trying to implement the UIRefreshControl in my application. I have an xib file and I added a UITableViewController to the empty nib file and I set the refresh property to "enabled". Also I have added code to the viewDidLoad and a custom refresh method. The problem is I have an error I can't find any information on....in my viewDidLoad I get "Property 'refreshControl' not found on object of type ViewController"
- (void)viewDidLoad{
[super viewDidLoad];
self.myTableView =
[[UITableView alloc] initWithFrame:self.view.bounds
style:UITableViewStyleGrouped];
self.myTableView.autoresizingMask = UIViewAutoresizingFlexibleWidth |
UIViewAutoresizingFlexibleHeight;
self.myTableView.delegate = self;
self.myTableView.dataSource = self;
[self.view addSubview:self.myTableView];
UIRefreshControl *refresh = [[UIRefreshControl alloc] init];
refresh.attributedTitle = [[NSAttributedString alloc] initWithString:#"Pull to Refresh"];
[refresh addTarget:self action:#selector(refreshView:) forControlEvents:UIControlEventValueChanged];
self.refreshControl = refresh;
}
-(void)refreshView:(UIRefreshControl *)refresh {
refresh.attributedTitle = [[NSAttributedString alloc] initWithString:#"Refreshing data..."];
// custom refresh logic would be placed here...
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"MMM d, h:mm a"];
NSString *lastUpdated = [NSString stringWithFormat:#"Last updated on %#",
[formatter stringFromDate:[NSDate date]]];
refresh.attributedTitle = [[NSAttributedString alloc] initWithString:lastUpdated];
[refresh endRefreshing];
}
I have no idea why that property isn't available....what am I missing?
Looks like I need to inherit from UITableViewController in my ViewController.h file. If I already have UITableView there how do I inherit from both? If I change my code from ViewController : UIViewController <UITableViewDelegate, UITableViewDataSource> to ViewController : UITableViewController <UITableViewDelegate, UITableViewDataSource> then I get an error:
error: NSInternalInconsistencyException',
reason: '-[UITableViewController loadView] loaded the "ViewController_iPhone" nib but didn't get a UITableView.'

Answer 1

You can add UIRefreshControl as a subview to your UITableView.
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
[refreshControl addTarget:self action:#selector(handleRefresh:) forControlEvents:UIControlEventValueChanged];
[self.myTableView addSubview:refreshControl];
As per Dave's comment, this may break in future version of iOS. So please be careful while using this and try to raise a bug report to apple regarding this.
Update:
A better approach is by adding UITableViewController as a ChildViewController of self and then adding tableViewController.tableView as the subview of self.view. You dont have to do any hack to make it work in this way.
[self addChildViewController:tableViewController];
[self.view addSubview:tableViewController.tableView];
You can define the frame for tableView accordingly. Using this approach, UIRefreshControl should work in the same way as it works for UITableViewController.
`

Answer 2

Things to Remember:
UIRefreshControl only for UITableViewController, so your class should be the subclass of UITableViewController.
UITableViewController has a property refreshControl, you should allocate a UIRefreshControl
and set it to that property.
Ex:
UITableViewController *tableViewController = [[UITableViewController alloc] initWithStyle:UITableViewStylePlain];
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
[refreshControl addTarget:self action:#selector(refreshControlAction:) forControlEvents:UIControlEventValueChanged];
tableViewController.refreshControl = refreshControl;

Answer 3

All of these are complex ways of doing something simple.
You don't need to add a refresh control, or declare one in your viewController. Adding pull-to-refresh is a two-step process.
Step 1: In your storyboard, go to your tableViewController and, where it says "Refreshing", select "Enabled".
Step 2: Add the following code to your tableViewController.m file, in viewDidLoad:
[self.refreshControl addTarget:self
action:#selector(refresh)
forControlEvents:UIControlEventValueChanged];
That's the entire process, other than doing stuff in your -refresh method. When you want it to stop refreshing, call [self.refreshControl endRefreshing];.

Answer 4

Your ViewController class must be a subclass of UITableViewController in order to have access to the refreshControl property.

Answer 5

I would recommend you to make separate UITableViewController Subclass for myTableView.
And then by using addChildviewController or iOS6 ContainerView to add that class within original ViewController. That way even in the part of View, you can use UIRefreshControl.
Accepted answer is not official way, so it could break in future release as comment said...