I'm using a UITableView which loads data from a server. I need to use async ASIHTTPRequest, which is in a separate .m.
How could I force to reload the table data when the requestFinished:request is called?
Thanks!
You can just send the data that needs to be loaded into the TableView by passing it between files. and then finally call a different method of inside the table view that implements the command [self.tableview relaodData];
Update:
What i see from your comments is that the you have a tableView CONtroller or someform of controller that loads the data by calling another class that holds the ASIHTTPrequest/ ansynchrinous requsts. now You have also told me that the TableView Also hold a UIViewController in each cell which i Dont think is a good idea you could go with a custom cell method have a look at this 4 part tutorial... now and the data that needs to be loaded into the TableView is loaded by TableViewController by some method wither it be each cell or something... so after you are able to get the data just inside the tableViewController just Call the [self.tablebview reloadData] inside the TableViewController which is the parent of the TableView there is no need to call in the other methods.
Finally solved with observers although when the app is completely closed won't work. I'll think in something.
Thanks
Related
I want to create one application that read many data from json and show them in tableview.
I want to create one button that when to click on it this page for a second time to be refresh and take data from json (check json again and if this json changed tableview also changed)
I dont know how create this function that refresh this page and run code at first.
please tell me about it.
[self.tableView reloadData]
to load more data from webserver in to table
Put a button in header of section. I think that is the best place. In target method of that button call json and download all data. then call [self.tableView reloadData]. It will call all table methods like number of row , sections, cellForRow.
Why don't you use the Default RefreshControl provided in iPhoneSDK.
A UIRefreshControl object provides a standard control that can be used to initiate the refreshing of a table view’s contents. You link a refresh control to a table through an associated table view controller object. The table view controller handles the work of adding the control to the table’s visual appearance and managing the display of that control in response to appropriate user gestures.
Check this to learn about its implementation : Working with UIRefreshControl
You can place a UIToolBar above the tableview. In that you can have a barbutton, to which you could give an action to fetch the data again. Once the data fetch is done, call
[self.tableview reloadData];
I've been stuck on this for all day.
I have a Nib file with a custom table cell wich I use to load into a
tableView instance variable of a view controller.
In the view controller I have a Search Bar and a Table View IBOutlets and a NSMutableArray to store my data as instance variables, among other stuff.
I have an object wich does asynchronous calls to an external API using Restkit so I define my view controller as it's delegate to receive the data when the request is finishe, save it on the NSMutableArray and then trigger a reloadData.
Because I'm making asynchronous calls the method shouldReloadTableForSearchString is in charge of sending the request and then return NO.
If I return YES instead of NO, making a call to reloadData after, my cells get loaded into the tableView one step back of my calls, that means that if I type the first letter nothing happens but on the second letter I get the results from the first letter. That behavior it's ok because the instance variable are setted after shouldReloadTableForSearchString returning YES. That is expected, Ok.
The problem that I'm facing is that if I use only reloadData, with shouldReloadTableForSearchString returning NO, the cells are not being assigned to the tableView. I checkhed and cellForRowAtIndexPath is being called and every cell is created with the data but it does not show.
Maybe I have problems with the datasource property, but I'm not sure.
I don't get the difference. Any Ideas?
I want to edit UITableView by calling EditTable method on a button click of some other class. In other words, I want to delete rows from UITableview from some other viewcontroller without navigating to that UITableView.
Please tell me the way to achieve this or any sample code for it.
If you want to delete rows from a tableview you just need to delete the corresponding rows from the datasource. When the table is next shown it should know how to reload it's data so the changes in the datasource are applied to the table.
Edit
You shouldn't rely on sending messages to view controllers that are deeper in the stack because they may have been unloaded already.
I've got a UITableView set up and working, and now I have a little issue. I need to reload the tableView's data whenever the view loads, and one thing which I can't get working is attempting to reload the data, when there was no data in the table view to begin with.
Basically the list is of variable length, and the contents are loaded from a file, what I want to know is, is there I way I can force the table to reload and not have it ignore the datasource methods, as is what happens whenever [tableView reloadData] is called.
[tableView reloadData] relies entirely on the data source methods! So, the only way you would see your data source methods beind ignored would be that you have not set the data source (and perhaps delegate) of your table view to be the object you want to be the data source. You can set these through Interface Builder, or programatically, e.g.:
tableView.dataSource = self;
tableView.delegate = self;
whenever the view loads
Where do you call reloadData? Do you call it in -viewDidLoad method? If yes it is probably incorrect, because -viewDidLoad is called only once - when view of the corresponding UIViewController is created (on the first usage). Maybe you should take a look at -viewWillAppear which is called(assuming correct usage of UIViewController) whenever view is going to be displayed.
The other possible reason is that if you do use -viewWillAppear (or -viewDidAppear) it is not triggered at all. This can happen if you use a custom UIViewController hierarchy. In that case you must call it with your own hands (there are exceptions - UINavigationController for example does this for you, but simple [someView addSubview:myController.view] doesn't).
Also please check if delegates are set correctly and tableView is not equal to nil (as you know messages to nil are just ignored).
datasource methods aren't ignored when u call [tableView reloadData];
Did u set the IBOUTLET and the sources right?
I have a table view which i want to populate with the results (XML) of my call to a web service.
The NSURLConnection and NSMutableURLRequest that are doing the setup for this are currently in my -viewDidLoad method, and i also have all of my UITableView delegate methods in my .m file too.
The data is being returned and added to my array correctly. My problem is (i think) that the UITableView methods are being called before any data has been returned from the web service, which is why my table view is always blank.
How can i call the methods in the right order (if this is even the problem)...
Are you calling reloadData on the tableview once you've repopulated the array? You need to let it know that you have new data.
UITABLEVIEW *mytableview=[[UITABLEVIEW alloc]init];
[mytableview reloadData];
Yes you are right; the UITABLEVIEW delegates are called before the web service. So you have to call those delegates again so try reloading the data. Works perfect for me. reload table when u have something returned from the webservice. store it in NSArray or whatever and then reload table.
Check out Apple's SeismicXML code example on the developer.apple.com/iphone site. It shows how to use NSURL, NSXMLParser, and a TableView to do just this type of thing.