Delete button in UIViewController which is showing the detail of a cell

I have an iPhone app that has a tableview which contains cells that when touched show a detail of that object. I would like to add a Delete button to the bottom of the detail view. When the user presses it the object which is represented by the 开发者_运维知识库cell should be removed and the app should return to the TableView.

In terms of best practices, which is the ideal way to accomplish this?

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There are few ways in which you can signal the deletion. One of them is delegates. You can define your delegate like this,

@protocol DetailViewControllerDelegate
- (void)shouldDeleteDetailObject:(id)object
@end

And then your table view controller subclass adopt the protocol and implement the method like,

- (void)shouldDeleteDetailObject:(id)object {
    [self.objectsArray removeObject:object];
    [self.navigationController popViewControllerAnimated:YES];
}

And then you message [self.tableView reloadData]; in viewWillAppear: as sandy has indicated.

Your button action will be implemented as,

- (IBAction)deleteObject {
    if ( self.delegate && [self.delegate respondsToSelector:@selector(shouldDeleteDetailObject:)] ) {
        [self.delegate shouldDeleteDetailObject:self.detailObject];
    }
}

And delegate should be an assigned property.

You can also look at notifications but this is a better route for this situation.

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I think there is nothing serious about this, if you successfully delete the particular details after that on backing on previous view (tableview) you just use this

-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [self.tableView reloadData];  
}