Iphone -- push a view controller onto the navigation stack when a button is clicked in a UITableViewCell

Question

When a button is pushed in one of my app's table view cells, I need to push a certain view controller onto the navigation stack.

This could be done by using an instance of NSNotification to inform the table view's controller of the button press. But that would be awfully heavyweight, especially since selections in a tab bar in the app could cause the table view to appear or disappear, creating additional overhead as the various table views register and unregister themselves whenever they are tabbed onto or off of the screen.

Can anyone think of a better solution?

Answer 1

Why not put

[[self navigationController] pushViewController:targetViewController animated:YES];

in the method called by the button?

Answer 2

Make your UITableViewController use the UITableViewDelegate Protocol and implement this method:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

From the indexPath you can get which row has been pressed and then you know which cell is being selected. The purpose of the UITableViewController is to know about the cells and the cell itself does not need a button to trigger an event to push a new view.

Answer 3

What I did was set the table view's delegate to be the same as its controller. Then:

UITableView *myTableView = (UITableView *)self.superview;
NSIndexPath *indexPath = [myTableView indexPathForCell: self];
MyTableViewController *myTableViewController = (MyTableViewController *)(myTableView.delegate);
[myTableViewController buttonWasPressedOnCellWithIndexPath: indexPath];