ios - 关闭 modalviewwontroller 后 Viewwillappear 不会被调用

Question

在我的 firstviewcontroller 中，我呈现了一个 modalviewcontroller ，然后通过一个操作，我调用一个显示警报并关闭 modalview 的方法，但是当它消失时 viewWillAppear 不会被调用:

firstviewcontroller

-(IBAction)AddActivity:(id)sender{


    CreateActivity *addViewController = [[CreateActivity alloc] initWithNibName:@"CreateActivity" bundle:nil];

    addViewController.delegate = self;
    addViewController.modalPresentationStyle = UIModalPresentationFormSheet;

    addViewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;

    [self presentModalViewController:addViewController animated:YES];


    addViewController.view.superview.frame = CGRectMake(50, 260, 680, 624);

}
//in secondviewcontroller I use an alert view that call this method in order to dismiss modalview

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
    if (buttonIndex == 0){


        if ([self respondsToSelector:@selector(presentingViewController)]){
            [self.presentingViewController dismissModalViewControllerAnimated:YES];
        }
        else {
            [self.parentViewController dismissModalViewControllerAnimated:YES];
        }
    }
}

当它消失时，viewWillAppear不会被调用，请问我缺少什么

Answer 1

更改以下代码即可工作:

 addViewController.modalPresentationStyle = UIModalPresentationFullScreen;

它会起作用。