how to refresh the root view after dismissal of a modal view?

After presenting another view on my rootview, then I dismiss it, I want to refresh or reload my view, is it possibl开发者_运维百科e?

Send the view setNeedsDisplay message.

I define a simple protocol for modal view controllers to use to notify their parent that they're done:

@protocol ModalViewControllerDelegate <NSObject>
- (void)modalViewControllerDone:(UIViewController*)viewController;
@end

The parent then implements this protocol, and assigns itself to the modal view controller's delegate property. When the modal view controller is finished, it calls [delegate modalViewControllerDone:self]. The parent then dismisses the modal view controller and can do whatever else it wants (in your case, reload something).