#import <CGModelTransition/CGModelTransition.h>

@implementation CGTopViewController

- (instancetype)init
{
    self = [super init];
    if (self) {
        CGModelTransitionController *transition = [[CGModelTransitionController alloc]initWithPresentedViewController:self];
        transition.presentedContentSize = CGSizeMake(275, 230);;
        transition.transitionAnimation = CGTransitionAnimationSlideFromTop;
        transition.animateDuration = 1;
        self.modelTransition = transition;
    }
    return self;
}

@end

    CGTopViewController *vc = [CGTopViewController new];
    [self presentViewController:vc animated:YES completion:nil];