使用模态跳转的动画push导航控制器：
//方法一：模态跳转，前提是利用navigationcontroller这个容器
// UserManagerViewController *userManagerVC = [[UserManagerViewController alloc] init];
// UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:userManagerVC];
// [self presentViewController:nav animated:YES completion:nil];
//方法二：push，只不过有莫泰跳转的方式，这种方法更好
UserManagerViewController *userManagerVC = [[UserManagerViewController alloc] init];
CATransition *animation = [CATransition animation];
animation.duration = 0.2;
animation.type = kCATransitionMoveIn;
animation.subtype = kCATransitionFromTop;
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault];
[self.navigationController.view.layer addAnimation:animation forKey:nil];
[self.navigationController pushViewController:userManagerVC animated:NO];//自定义动画，此处要设为NO
