Xcode 6 - Push segue to same view controller

问题:

I have a table view controller and tapping on a cell can trigger one of many different types of push segues based on the type of data in the cell. The identifier of the correct segue is determined in tableView:didSelectRowAtIndexPath: and then the segue is triggered with self.performSegueWithIdentifier:

For one of those segues, I'd like to push another instance of the same view controller on to the navigation stack. Is this possible without having to drag a new view controller object of the same type onto the storyboard? So far, I have only been able to wire up a segue to the same view controller if I Ctrl + Drag from the table cell to the view controller. This is not what I want.

回答1:

As suggested, I don't think a segue will work. Instead you can push a new instance of the same view controller programmatically, which will have the same effect as performing the segue. The difference is that segue delegate methods like prepareForSegue won't be called.

- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    MyViewController *vc = [[MyViewController alloc] init];
    [self.navigationController pushViewController:vc animated:YES];
} 

回答2:

Complemeting answer above you can do this in Swift 3 using:

 let vc = ViewController()          
 self.navigationController?.show(vc, sender: nil)

If you are using storyboard you can use this:

let vc = self.storyboard?.instantiateViewController(withIdentifier: "ViewControllerID") as! YourViewController
self.navigationController?.show(vc, sender: nil)

回答3:

1. Create a Storyboard Reference in IB.
2. Refer it to the view controller.
3. Then you can create a segue from the view controller to the reference, which refers to itself.