ios - DismissViewControllerAnimated EXC_Bad_ACCESS 为真

Question

我正在按照苹果从 WWDC 发布的教程“查看 View Controller 内部”进行操作，以创建自定义 View Controller (此处为视频:https://developer.apple.com/videos/wwdc/2014/，示例代码为:https://developer.apple.com/library/ios/samplecode/LookInside/Introduction/Intro.html)。我主要是复制他们的 objective-C 并将其逐行翻译成 Swift，除了用手势点击隐藏覆盖 viewController 之外，我几乎已经开始工作了。

当我打电话时:

func dimmingViewTapped(recognizer: UIGestureRecognizer) {
    self.presentingViewController.dismissViewControllerAnimated(true, completion: nil)
}

我得到一个错误:Thread 1: EXC_BAD_ACCESS (code=1, address=0xc) if the animated field set to true。如果将其设置为 false，则一切正常，并且在没有动画的情况下消失)。另一件奇怪的事情是它有时会在设置为 true 时起作用。也许每 15 次尝试中就有一次动画会完成并且我不会收到错误。

我遵循与示例代码中定义的完全相同的结构，其中有一个转换委托(delegate)处理演示 Controller 对象和动画的创建。

class OverlayTransitioningDelegate : NSObject, UIViewControllerTransitioningDelegate {

func presentationControllerForPresentedViewController(presented: UIViewController,
    presentingViewController presenting: UIViewController,
    sourceViewController source: UIViewController) -> UIPresentationController {
        return OverlayPresentationController(presentedViewController: presented,
            presentingViewController: presenting)
}

func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
    var animationController: OverlayAnimatedTransitioning = OverlayAnimatedTransitioning()
    animationController.isPresentation = true
    return animationController
}

func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
    var animationController: OverlayAnimatedTransitioning = OverlayAnimatedTransitioning()
    animationController.isPresentation = false
    return animationController
}

}

我知道有一些关于此的问题，但在阅读之后我仍然感到困惑，正在寻求帮助。

Answer 1

确保您的过渡代表被牢牢捕获。将其设置为 Controller 上的强属性。

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
SearchDetailsViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"SearchStoryboardID"];
viewController.delegate = self;
SearchDetailsViewControllerTransitioningDelegate *transitioningDelegate = [[SearchDetailsViewControllerTransitioningDelegate alloc] init];
**self.detailsTransitioningDelegate** = transitioningDelegate;
viewController.transitioningDelegate = (id <UIViewControllerTransitioningDelegate>)self.detailsTransitioningDelegate;
[self presentViewController:viewController animated:YES completion:nil];