Present ViewController with custom animation

Question

I am presenting a view controller using the foll. code:

VC_B * b = [[VC_B alloc] init...];
[self presentViewController:b animated:YES completion:nil];

I am trying to animate appearance of the view controller: the incoming VC should slide down from top covering VC that is currently displayed. following this solution makes it work with one problem: current VC disappears before the incoming VC appears on the screen. Is there a way to resolve this? perhaps there is an alternative solution to achieve this effect.

score 3 · Answer 1 · answered May 04 '13 at 21:12

Try this code :

CreateNewViewController *newViewController = [[CreateNewViewController alloc]initWithNibName:@"CreateNewViewController" bundle:nil];

    CATransition *transition = [CATransition animation];
    transition.duration = 0.05;
    transition.timingFunction = [CAMediaTimingFunction      
    functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type =kCATransitionMoveIn;
    transition.subtype =kCATransitionFromTop;

    transition.delegate   = self;

    [self presentModalViewController:newViewController animated:NO];
    [self.view insertSubview:newViewController.view atIndex:0];

    [self.view.layer addAnimation:transition forKey:nil];

Hope this will help you .

score 0 · Answer 2 · edited Sep 13 '20 at 22:30

0

Try the below code. You just need to call below method from the point where you want to display NewViewController. What you need to do is that you just need to change the OriginY of NewViewcOntroller's View Frame.

-(void)displayNewVC
 {

 YourNewViewController *newVC = [[YourNewViewController alloc] init];

CGFloat originY = -450;//set originY as you want to display newViewController from the Top to bottom with animation
//initially set originY out of the Frame of CurrentViewcontroller
newVC.view.frame = CGRectMake(orginX, originY, newVC.view.frame.size.width, newVC.view.frame.size.height);

/*Display View With Animation*/
 originY = 300;
[UIView animateWithDuration:.3 animations:^{
     //set new originY as you want.
    newVC.view.frame = CGRectMake(orginX, originY, newVC.view.frame.size.width,  newVC.view.frame.size.height);
    
 } completion:NULL];

 [currentViewController.view addSubview:newVC.view];

 }

edited Sep 13 '20 at 22:30

halfer

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answered May 04 '13 at 18:57

Kamar Shad

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can you explain originY usage inside `animateWithDuration` call? – Asahi May 04 '13 at 19:03
@Asahi it would the point where you want the display your NewViewControler in CurrentViewController.And i have just give a example ,Just try that out.... – Kamar Shad May 04 '13 at 19:06
it wasn't in use in your original answer. OK now - will try. – Asahi May 04 '13 at 19:09
anyway to do this using presentViewController and not addSubview? – Asahi May 04 '13 at 19:24
@Asahi Nops, given example because you were talking about custom animation.and well it's up to you want to use. – Kamar Shad May 04 '13 at 19:31
does this mean it's impossible to animate VC being presented using `presentViewController`? – Asahi May 04 '13 at 19:33
@Asahi it depends on the way you presenting the ViewController. – Kamar Shad May 04 '13 at 19:36
One of the problems with this approach is that the view management (view(Will|Did)(Appear|Disappear)) do not get called, leaving the UI in a potentially fragile state. – Rizwan Sattar Jul 10 '13 at 22:50

Present ViewController with custom animation

2 Answers2