用于推送UIViewController的自定义动画

Question

我想在推送视图控制器时显示自定义动画:我希望实现像"扩展"动画这样的东西,这意味着新视图从给定的矩形扩展,让动画期间[100,100 220,380]全屏显示.

任何建议从哪里开始,分别是任何文档,教程,链接？:)

---

好的.我可以使用以下代码制作展开动画:

if ([coming.view superview] == nil)   
    [self.view addSubview:coming.view];
    coming.view.frame = CGRectMake(160,160,0,0);
    [UIView beginAnimations:@"frame" context:nil];
    [UIView setAnimationDuration:4];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [coming viewWillAppear:YES];
    [going viewWillAppear:YES];
    coming.view.frame = CGRectMake(0, 0, 320, 480);
    [going viewDidDisappear:YES];
    [coming viewDidAppear:YES];
    [UIView commitAnimations];

我的视图已正确显示,但遗憾的是导航栏未更新.有没有办法手动完成？

---

在示例代码中,一个函数被称为0.03秒,用于更新视图的转换.不幸的是,当推动一个时UIViewController,我无法调整视图的框架...我是吗？

Answer 1

我使用以下函数(添加到UINavigationController)来自定义推送动画:

- (void) pushController: (UIViewController*) controller
         withTransition: (UIViewAnimationTransition) transition
{
    [UIView beginAnimations:nil context:NULL];
    [self pushViewController:controller animated:NO];
    [UIView setAnimationDuration:.5];
    [UIView setAnimationBeginsFromCurrentState:YES];        
    [UIView setAnimationTransition:transition forView:self.view cache:YES];
    [UIView commitAnimations];
}

我想你可以调整这段代码来做你想做的任何动画.

Answer 2

您正在寻找的代码:

    [UIView beginAnimations:@"View Flip" context:nil];
[UIView setAnimationDuration:0.80];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

[UIView setAnimationTransition:
 UIViewAnimationTransitionFlipFromRight
                       forView:self.navigationController.view cache:NO];


[self.navigationController pushViewController:menu animated:YES];
[UIView commitAnimations];

Answer 3

您可以做的是推送下一个视图控制器,但不要为其设置动画,如下所示:

[self.navigationController pushViewController:nextController animated:NO];

...然后,在推入的视图控制器中,您可以使用CoreAnimation对其视图进行自定义动画.这可能最好在viewDidAppear:(BOOL)animated方法中完成.

查看核心动画指南,了解如何实际制作动画.特别注意隐式动画.

编辑: 更新链接

Answer 4

@zoul:这很棒!我只是将"self"更改为"self.navigationController",将"self.view"更改为"self.navigationController.view".不知道是否有必要,但它有效.和@crafterm一样,弹出后,只需在viewDidLoad或ViewWillAppear中添加此代码即可创建自己的leftBarButtonItem:

//add your own left bar button
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(backButtonTapped)];
self.navigationItem.leftBarButtonItem = backButton;
[backButton release];

然后我只是调整了push函数并创建了我在-backButtonTapped方法中调用的popWithTransition函数.

- (void) popWithTransition: (UIViewAnimationTransition) transition
{
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:.75];
    [UIView setAnimationBeginsFromCurrentState:YES];        
    [UIView setAnimationTransition:transition forView:self.navigationController.view cache:YES];
    [UIView commitAnimations];
[self.navigationController popViewControllerAnimated:NO];
}

请注意,在动画之后,popViewController调用已下移到结尾.不知道那是不是犹太洁食,但又一次,它起作用了.