iOS开发自定义试图切换

    CATransition *transition = [CATransition animation];
    transition.duration = 1.0f;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = @"moveIn";
    transition.subtype = kCATransitionFromBottom;
    transition.delegate = self;
    [self.navigationController.view.layer addAnimation:transition forKey:nil];
    [self.navigationController pushViewController:photoWall animated:YES];