How do I have a UITableView be notified that the data it is using is new and all old data/cells should be flushed.
I have a search bar that will cause the UITableView to be refreshed when new queries are entered.
An example would be:
[myTableView reloadData];
Related
I've UItableView in UIViewController and database connected to UItableVIew it loads data from sqlite3 database but its not Showing new content when i add new content to database until i relaunch the application. I tried below code
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.LengthTableFrom reloadData];
}
when you add new content at that after that get all data again and also add this line after get all data
[self.LengthTableFrom reloadData]
i hope it will work fine..
:)
I think when you are adding or editing your data to database.
And in viewController where tableView exist
In viewDidLoad you are fetching data from database & saving into array. Reloading list in viewWillAppear. For fist time it works fine, after when you add new content to your database your array for tableView will not be having new content.
For testing you can have your data fetching from database in your viewWillAppear view controller, to check it works fine.
In real time you have to add the new content to database get the ref id, and add the new content with ref id to your array for tableView.
It's simply mean that you are not calling the [self.LengthTableFrom reloadData] method properly.
You should place this code [self.LengthTableFrom reloadData] just below the code where you fetching the database content .
i hope it'll work fine.
Given this Core Data Model: Photographer <-->>Photos.
After adding a Photographer via a Modal View, the tableView of Photographers updates accordingly.
The problem is, that it doesn't do the same for Photos. I can add a Photo via a Modal View, and the tableView of Photos for that particular Photographer does not update immediately. Once I navigate back to the tableView of Photographers and select the same Photographer again, it updates as expected.
How can I get the tableView of Photos to update as soon as the Modal View(where the user added the object) gets dismissed?
Where modal view dismiss try to use:
[tableView reloadData];
Try
[tableview reload];
method after getting new data.
Check your error variable if it contains an error.
You directly assign the result of -executeFetchRequest:error: to an ivar (photographerPhotosArray). This either leaks or causes an immediate release.
Consider switching to NSFetchedResultsController since it helps you a lot.
Check your array first is it fill or empty? try with NSLog and check it. if it exist then reload your table
in my iphone app i am adding data to table view on click of button but its not getting updated.It ll update only if i reopen the app.
Use [yourTableView reloadData] to tell the tableview to reload its data and be updated.
Use the [tableView reloadData] method on button click after updating the table view's data source.
So something like this:
-(IBAction) buttonPressed:(id)sender
{
// Update data source of table first
[tableView reloadData]
}
Also check this out: UITableView reload data
try [tableview reloadData]
in wiewWillApear method
Preview Controller to reload its data from its data source.
- (void) reloadData
The display is recomputed only if the current preview item has changed.
In my app I am doing tableView. By clicking row, the new view will navigate. Before navigation of new view, application is processing data from server. Until processing of data finished, view will not navigate. In this time period I want to disable userinteraction of tableview, so user can not select further rows.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
tableView.userInteractionEnabled = NO;
}
Note that, When I again come back to the tableview, user will again allowed to select any row.
I do not have any idea, how can I enable userinteracation again.
I assume that you are getting your data asynchronously.
In this case, you can re-enable user interaction from your connection delegate method. If you are using NSURLRequest/NSUrlConnection, the delegate method would be: connectionDidFinishLoading: (don't forget also about connection:didFailWithError:).
From NSURLConnection Reference:
connectionDidFinishLoading:
Sent when a connection has finished loading successfully.
So, when the data is there and you are done with the processing, you re-enable the table view.
For Coming back after navigation, Put following sentence in your viewWillAppear That will again allow your table view user interaction to true.
tableView.userInteractionEnabled = YES;
I am developing an app in which I have to delete the contacts from table ,problem is that when i delete one contact ,I have switch from one view to another then I can see the changing b/c i put the reload method in viewAppear any suggestion?
In general you should avoid to use reloadData to refresh the content of a UITableView, you should only do it if you can't avoid it (ie you replace everything in your table) or the user won't see it (ie in viewWillAppear).
I would suggest to use insertRowsAtIndexPaths:withRowAnimation: to insert single rows and deleteRowsAtIndexPaths:withRowAnimation: to remove rows.
So you get the indexPath of the row when you delete a contact and call [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:deletedIndexPath] withRowAnimation:UITableViewRowAnimationFade]
Those details make the difference between a app and a good app.
you can call [self.tableView reloadData]; to reload the table view by staying on the current view.
You can immediately reload table after deleting the contact !
Just call [self.tableView reloadData] in the UITableViewController after the data has been modified. This will update the table view to and reflect the new state of the data.