使用自定义转换旋转模态 UIViewController

Posted 2023-03-11

【中文标题】使用自定义转换旋转模态 UIViewController

【英文标题】：Rotating a modal UIViewController with custom transition

【发布时间】：2015-07-15 11:32:16

【问题描述】：

我有一个自定义 UIViewController 类别，它应用一个模糊父级的过渡并将其向后和向上推一点。

看起来像这样：

我正在创建 animateTransition 中父级的模糊屏幕截图，将其与 obj_setAssociatedObject 关联到呈现的视图控制器并在关闭后将其删除。

它就像一个魅力，但是当我旋转到横向时，背景视图不会旋转，这是预期的：

我尝试在animateTransition 中添加通知以更改方向，但由于它是转换管理器的内部，它会在转换完成后被释放（我假设）。

尝试将转换管理器对象与呈现的 VC 关联，但没有成功。

当方向改变时，如何从过渡管理器内部或结合父类别更新模糊视图？ （ios 7 兼容）

类别：

- (void)presentCustom:(UIViewController *)viewControllerToPresent
                                     completion:(void (^)(void))completion

    viewControllerToPresent.transitioningDelegate = self;
    [self presentViewController:viewControllerToPresent animated:YES completion:completion];


- (void)dismissCustom:(void (^)(void))completion

    [self dismissViewControllerAnimated:YES completion:completion];

【参考方案1】：

所以我确实想出了以下方法，它似乎有效，可能对这种情况下的人有所帮助。

//#import "NSObject+AssociatedObjects.h" 

// in animateTransition , presenting part 
// adds self to the presented controller
[toViewController associateValue:self withKey:&kTransitionManagerAssocKey];
// adds sourceVS to self 
[self associateValue:fromViewController withKey:&kOriginalViewControllerAssocKey];
// adds the blurred image to presentedVC
[toViewController associateValue:blurImageView withKey:&kBlurImageAssocKey];
// adds presentedVC to self
[self associateValue:toViewController withKey:&kPresentedViewControllerAssocKey];
// Register for orientation changes, so we can update the presenting controller screenshot
// in the method get the original controller, render it in the existing blurred view or replace it and readd it to the container
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(transitionManager_interfaceOrientationDidChange:)
                                             name:UIDeviceOrientationDidChangeNotification
                                           object:nil];

对于解雇部分，一切都需要清理：

// get the associated manager and clear everything
TransitionManager * oldManager = [fromViewController associatedValueForKey:&kTransitionManagerAssocKey];
if (oldManager)

   [[NSNotificationCenter defaultCenter] removeObserver:oldManager name:UIDeviceOrientationDidChangeNotification object:nil];
   [oldManager associateValue:nil withKey:&kOriginalViewControllerAssocKey];
   [oldManager associateValue:nil withKey:&kPresentedViewControllerAssocKey];
   [fromViewController associateValue:nil withKey:&kTransitionManagerAssocKey];

// this one is cleared when the transition is complete
[fromViewController associateValue:nil withKey:&kBlurImageAssocKey];