ios - 将 Google Analytics 添加到项目后 CoreData 方法出错

Question

我有一个带有 CoreData 的应用程序。在我今天使用此 guide 中概述的说明将 Google Analytics 添加到应用程序之前，一切都运行良好.

我现在在 AppDelegate 的 CoreData 方法中看到一个错误:

错误是:

'ErrorType' is not convertible to 'NSError'; did you mean to use 'as!' to force downcast?

我试过将其更改为 as! 甚至删除 as NSError 但没有成功。

有人知道这是怎么回事吗？

更新:

我找到了罪魁祸首，但仍未弄清楚它崩溃的原因。使用 Google Analytics 设置项目时，指南会要求您将以下代码添加到每个 View Controller 中的 viewWillAppear 方法:

    let tracker = GAI.sharedInstance().defaultTracker
    tracker.set(kGAIScreenName, value: "name_of_controller")

    let builder = GAIDictionaryBuilder.createScreenView()
    tracker.send(builder.build() as [NSObject : AnyObject])

最后一行 tracker.send(builder.build() as [NSObject : AnyObject]) 导致构建失败并出现如上所示的错误。

Answer 1

例子

catch var error1 as NSError {
            error = error1
            coordinator = nil
            // Report any error we got.
            var dict = [String: AnyObject]()
            dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"
            dict[NSLocalizedFailureReasonErrorKey] = failureReason
            dict[NSUnderlyingErrorKey] = error
            error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict)
            // Replace this with code to handle the error appropriately.
            // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
            NSLog("Unresolved error \(error), \(error!.userInfo)")
            abort()
        } catch {
            fatalError()
        }