Ios 显示第0行发生故障的故障报告？

谁能帮我解开这起车祸报告的神秘面纱

没有异常名称或原因，回溯显示崩溃发生在包含崩溃的

init

方法的文件的第0行。什么

崩溃线程的第一对符号行：

0    AppName 0x000000010008c370 init (article, $metatype) (ArticleImageProvider.swift:0)
1    AppName 0x000000010006b0c4 shareArticleActivityViewController (article, track) (BasicArticleSharingController.swift:28)
2    AppName 0x0000000100063198 sharePressed () (DetailsViewController.swift:202)
3    AppName 0x00000001000600c8 sharePressed () (DetailsViewController.swift:200)
4    AppName 0x00000001000bfa8c sharePressed () (ContentNavView.swift:108)
5    AppName 0x000000010022f4b4 __55-[ASControlNode sendActionsForControlEvents:withEvent:]_block_invoke (ASControlNode.m:360)
6    AppName 0x000000010022f21c -[ASControlNode sendActionsForControlEvents:withEvent:] (ASControlNode.m:381)
7    AppName 0x000000010022e5b8 -[ASControlNode touchesEnded:withEvent:] (ASControlNode.m:191)
8    AppName 0x000000010026185c -[_ASDisplayView touchesEnded:withEvent:] (_ASDisplayView.mm:173)
9    UIKit 0x0000000187613d8c forwardTouchMethod + 260
10    UIKit 0x00000001874b0a2c -[UIWindow _sendTouchesForEvent:] + 696
11    UIKit 0x00000001874a9f68 -[UIWindow sendEvent:] + 680
12    UIKit 0x000000018747d18c -[UIApplication sendEvent:] + 260
13    UIKit 0x000000018771e324 _UIApplicationHandleEventFromQueueEvent + 15420
14    UIKit 0x000000018747b6a0 _UIApplicationHandleEventQueue + 1712

---

下面是一些代码：

// Where I attach the action to my button in ContentNavView
    shareButton.addTarget(self, action: "sharePressed", forControlEvents: ASControlNodeEvent.TouchUpInside)

/* snip */

// The implementation of ContentNavView#sharePressed()
func sharePressed() {
    delegate.sharePressed()
}

---

所以，我在这里学到了一些东西：

objectWithID:

返回

NSManagedObject

。就这样。无法保证您发送该消息的对象将返回与接收方相同类型的对象，因此测试返回的对象是处理此问题的最安全方法。因此，确定范围以减少或消除托管对象的线程问题是一个首要问题，它将彻底消除此问题

编译后的Swift代码中的信号陷阱非常少，因此从Apple或CriterCism（通过

NSThread#callStackSymbols

或其他一些API）获取崩溃报告时，总是会返回与我在这里显示的相同的垃圾。您所能做的最好的事情就是推断可能导致崩溃的词法范围，并梳理代码中可能出现的错误。我们不得不这样做，直到斯威夫特成熟

尽量少用隐式展开的选项

---

你更新xcode了吗？尝试删除缓存文件实际上，在我看来，您非常了解如何在代码中查找问题。但是，您没有向我们显示任何代码，因此很难看到您的要求。除了“什么？”之外，似乎没有任何问题。@jycr753这篇撞车报告是用批判性语言来表示的。无论如何，我认为Xcode在这里帮不了什么忙。@matt问题是，是否有人能帮助揭开坠机报告的神秘面纱。我已经添加了回溯中提到的实现。但是你没有说它有什么神秘之处，所以什么是去神秘。看来你在ArticleImageProvider中崩溃了。但是你还没有展示出来……另一个解决方案——我不情愿地决定采用的解决方案——是在Swift成熟之前，主要使用目标C进行编码。

// Where I attach the action to my button in ContentNavView
    shareButton.addTarget(self, action: "sharePressed", forControlEvents: ASControlNodeEvent.TouchUpInside)

/* snip */

// The implementation of ContentNavView#sharePressed()
func sharePressed() {
    delegate.sharePressed()
}

// The implementation of DetailsViewController#sharePressed()
func sharePressed() {
    if let cell = currentCell {
        let activityViewController = BasicArticleSharingController.shareArticleActivityViewController(cell.article)

        self.view.window?.rootViewController?.presentViewController(activityViewController, animated: true, completion: nil)
    }
}

// The implementation of BasicArticleSharingController#shareArticleActivityViewController(::) up to the initializer
class func shareArticleActivityViewController(article: Article, track: Bool = true) -> UIActivityViewController {
    var article = CoreDataManager.sharedManager.managedObjectContextForCurrentThread().objectWithID(article.objectID) as! Article

    let activities = [
        ArticleImageProvider(article: article), // Crash when calling this init?
        ArticleLinkProvider(article: article)
    ]

    /* snip */
}

// Implementation of the init that's crashing.  Apparently Swift only reports the class that crashes, not the line that crashes, so here's the implementation that I thought wasn't relevant.
final public class ArticleImageProvider: UIActivityItemProvider {

    let articleObjectID: NSManagedObjectID

    init(article: Article) {
        self.articleObjectID = article.objectID

        let article: Article = CoreDataManager.sharedManager.managedObjectContextForCurrentThread().objectWithID(article.objectID) as! Article

        let thumbnailCut = article.headlineImage?.cutWithShape(.Landscape)

        if let path = thumbnailCut?.localURL?.path {
            if let image = UIImage(contentsOfFile: path) {
                super.init(placeholderItem: image)
            }
            else {
                super.init(placeholderItem: UIImage())
            }
        } else {
            super.init(placeholderItem: UIImage())
        }
    }

    /* snip */
}