Question

In my app I push a viewcontroller on top of an other when a uitableviewcell gets selected. When I pop the new viewcontroller from top I get back to the one where I began with.
When this happens I would like to perform a refresh action, but I don’t know how to catch this event. How can I do this?

Answer 1

Try one of these:

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    BOOL pushed = [self isMovingToParentViewController];

    printf("viewWillAppear     %d\n", pushed);

}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];

    BOOL popped = [self isMovingFromParentViewController];

    printf("viewWillDisappear     %d\n", popped);

}

from the Apple documentation: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIViewController_Class/Reference/Reference.html