将Google Analytics添加到项目后，CoreData方法出错

Question

我有CoreData的应用。一切正常，直到我今天使用此guide中列出的说明将Google Analytics添加到应用中。

我现在看到CoreData中的AppDelegate方法出错了：

错误是：

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

我尝试将其更改为as!，甚至在没有运气的情况下删除as NSError。

任何人都知道发生了什么？

更新

我找到了罪魁祸首，但仍然无法弄清楚它为什么会崩溃。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视图控制器中的viewWillAppear方法中：

    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，并显示上面显示的错误。

Answer 1

例如

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()
        }