tableview reloaddata in masterview from detail view - objective-c

Question

I have a master-detail application that has a tableview in the masterViewController and in the detailview you can edit and add info into textfields and so on. I have a save button as the rightBarButtonItem in the detail view. If they did not save their work and they hit back I have a UIAlertView that popsup asking them if they want to save their work. Behind the alertview the detailview is still dismissed and the masterviewcontroller is now showing.
So when I hit save the tableview does not update. I have [tableview reloadData] in my masterviewcontroller viewWillAppear but it does not work because the viewappears behind the alertview before the user can hit save. I would like to call the [tableview reloadData] (or something similar) in this method here which is called from my detailview.
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
I can't just call [tableview reloadData] because the alertViews delegate is set as the detailview because it is pulling all the information from the textfields to save into the plist if they push save on the alertview. Is there a way I can call [tableView reloadData] from my alertView?

Answer 1

If I understand your problem correctly, you are dismissing the detailView before any button is tapped on the alertView. I don't know where you save your data and where the tableView retrieves it from but try waiting for user interaction on the alertView.
In the code where you pop the alertView to ask for save, do nothing else.
- (void)yourBackButtonAction //i assumed this is your method when they hit 'back'
{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:title message:#"Would you like to save your work?" delegate:self cancelButtonTitle:#"No" otherButtonTitles:#"Yes", nil];
[alertView show];
[alertView release];
}
And in the delegate method, save the data and dismiss the detailView:
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 1) //yes
{
//save your data
[self.navigationController dismissModalViewControllerAnimated:YES];
}
else // no
[self.navigationController dismissModalViewControllerAnimated:YES];
}
Now in your masterViewController's viewWillAppear method, [self.tableView reloadData] should work.

Answer 2

I figured it out. What I did was created a property of UITableViewController in my DetailViewController.h file and named it masterView then synthesized it in its .m file. I then went into my masterViewController.m file and found the method tableView:didSelectRowAtIndexPath:and set my detailsViewController.masterView property to self (self being the masterViewController).
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
self.detailViewController.masterView = self;
}
I then went into my UIAlertView Save Method and called reloadData on the masterViews tableView
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 1) {
[masterView.tableView reloadData];
}
}
This is very much like passing info to an array or dictionary in the detail view from the tableView indexPath.row like this below (which is also in the method tableView:didSelectRowAtIndexPath:)
self.detailViewController.detailItem = object;

Answer 3

set the property of the tableview and try
[self.tableView reloadData]

Answer 4

I guess you have to create a delegate method for this.
Create a protocol,
Create one method inside for e.g. - (void) updateMyMasterTable;
Create a delegate instance like id <ProtocolName> obj; in your detail class & write in .h file.
Synthesize it.
When you want to reload your master's tableview call [obj updateMyMasterTable];
In your master class .m file implement - (void) updateMyMasterTable method & call [tableView reloadData];