animation and call to another view ios7

i'm testing code i've found on tutorial, animated png. code:

code:

 - (void)viewdidload {     [super viewdidload]; 	// animazione intro      // load images     nsarray *imagenames = @[@"1.png", @"2.png", @"3.png", @"4.png",                             @"5.png", @"6.png", @"7.png", @"8.png",                             @"9.png", @"10.png", @"11.png", @"12.png",                             @"13.png", @"14.png", @"15.png", @"16.png"];          nsmutablearray *images = [[nsmutablearray alloc] init];     (int = 0; < imagenames.count; i++) {         [images addobject:[uiimage imagenamed:[imagenames objectatindex:i]]];         nslog(@"%d", i);              }          // normal animation     uiimageview *animationimageview = [[uiimageview alloc] initwithframe:cgrectmake(0, 0, 1024, 768)];     animationimageview.animationimages = images;     animationimageview.animationduration = 8;     animationimageview.animationrepeatcount = 1;     animationimageview.image = [animationimageview.animationimages lastobject];        [self.view addsubview:animationimageview];          [animationimageview startanimating];   uistoryboard *sb = [uistoryboard storyboardwithname:@"main" bundle:nil];     uiviewcontroller *vc = [sb instantiateviewcontrollerwithidentifier:@"secondaschermata"];     [[[[uiapplication sharedapplication] delegate] window] setrootviewcontroller:vc];        }  

but don't see animation, next view. why? how can fix this?

 

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