Question

Im calling this code from the MasterViewController in a UISplitVC for an iPad app:

-(void)viewWillAppear:(BOOL)animated{
//PRESENT MODALVC
ModalViewController *modalVC = [[ModalViewController alloc] initWithNibName:@"ModalViewController" bundle:nil];
[self setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentModalViewController:modalVC animated:YES];

}

but it doesn’t work. No ModalVC appears.

Answer 1

Try this code:

ModalViewController *modalVC = [[ModalViewController alloc] initWithNibName:@"ModalViewController" bundle:nil];
[modalVC setModalPresentationStyle:UIModalPresentationFullScreen]; //You set the presentation style of the controller that would be presented, not the presenting controller
//This check is needed, because presentModalViewController:animated is depreciated in iOS5.0 and presentViewController:animated:completion must be used instead. The same is valid for dismissModalViewControllerAnimated and dismissViewControllerAnimated:completion
if([self respondsToSelector:@selector(presentViewController:animated:completion:)])
    [self presentViewController:modalVC animated:YES completion:nil];
else
    [self presentModalViewController:modalVC animated:YES];

If you are targeting iOS5.0+ only this check is not needed and you should use only presentViewController:animated:completion and dismissViewControllerAnimated:completion