Question

In my app I have a drill-down type interface as follows:
My root view, which has a list of items and an “Add” button.
Selecting an item pushes the “Detail” view on the navigationController.
Selecting the “Add” button pushes an “Add” view.

How would I transition between the Add view to the Detail view?

I’m thinking of doing an unanimated “pop” on the Add view and push the Detail controller on, but how do I make the second part animated, so the detail view would either slide in vertically or fade in from the Add view?

Thanks,
Kelso

Answer 1

Based on Ramin’s reply, you can try this way, which is used by Apple in several samples:

MyListViewController.h

#import "MyAddViewController.h"

@interface MyListViewController : UITableViewController <MyAddViewControllerDelegate> {
}

- (IBAction)add:(id)sender;
@end

MyListViewController.m

// Action for bring up add view controller
- (IBAction)add:(id)sender {
    MyAddViewController *addViewController = [[MyAddViewController alloc] initWithStyle:UITableViewStyleGrouped];
    addViewController.delegate = self;

    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:addViewController];
    [self presentModalViewController:navigationController animated:YES];

    [navigationController release];
    [addViewController release];     
}

// MyAddViewController's delegate method, dismiss the add view controller in here
- (void)addViewController:(MyAddViewController *)addViewController didAddData:(MyData *)data{
if (data) {
   MyDetailViewController *detailViewController = [[MyDetailViewController alloc] initWithStyle:UITableViewStylePlain];
   detailViewController.data = data;
   [self.navigationController pushViewController:detailViewController animated:YES];
   [detailViewController release]; 
}
[self dismissModalViewControllerAnimated:YES];
}

MyAddViewController.h

@protocol MyAddViewControllerDelegate;
@class MyData;

@interface MCCourseAddTableViewController : UITableViewController {
@private
    MyData *data;
    id <MCCourseAddDelegate> delegate;
}

// MyData could be NSManagedObject if you want to use Core Data
@property(nonatomic, retain) MyData *data;
@property(nonatomic, assign) id <MyAddViewControllerDelegate> delegate;

- (void)save;
- (void)cancel;
@end

@protocol MyAddViewControllerDelegate <NSObject>
@optional
- (void)addViewController:(MyAddViewController *)addViewController didAddData:(MyData *)data;;
@end

MyAddViewController.m

- (void)save {
    if (self.delegate != nil) {
        if ([self.delegate conformsToProtocol:@protocol(MyAddViewControllerDelegate)]){
            if ([self.delegate respondsToSelector:@selector(addViewController:didAddData:)]){
                // Send data back to List View, to bring up detail view controller and dismiss add view controller
                [self.delegate addViewController:self didAddData:self.data];
            }
        }
    }
}

- (void)cancel {
    if (self.delegate != nil) {
        if ([self.delegate conformsToProtocol:@protocol(MyAddViewControllerDelegate)]){
            if ([self.delegate respondsToSelector:@selector(addViewController:didAddData:)]){
                // Send nil back to ListView, to dismiss the add view controller only
                [self.delegate addViewController:self didAddData:nil];
            }
        }
    }
}