xcode “AppDelegate”没有名为“managedObjectContext”的成员
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'AppDelegate' does not have a member named 'managedObjectContext'
提问by WholemealCat
I have been following a guide on how to have values using CoreData in swift. I have been having the error 'AppDelegate' does not have a member named 'managedObjectContext'. The guide was using the Beta version of XCode, has this been changed and any ideas on how I can fix my problem.
我一直在遵循有关如何在 swift 中使用 CoreData 获取值的指南。我一直有错误“AppDelegate”没有名为“managedObjectContext”的成员。该指南使用的是 XCode 的 Beta 版，这是否已更改以及有关如何解决问题的任何想法。
@IBAction func saveButtonPushed(sender: AnyObject) {
var appDel:AppDelegate = (UIApplication.sharedApplication().delegate as AppDelegate)
var context:NSManagedObjectContext = appDel.managedObjectContext
var newName = NSEntityDescription.insertNewObjectForEntityForName("SavedFills", inManagedObjectContext: context) as NSManagedObject
newName.setValue("Test", forKey: "name")
newName.setValue("Test2", forKey: "password")
context.save(nil)
println(newName)
println("Saved")
}
回答by Christian
No, it shouldn't have changed at all. The error says it. There is no managedObjectContextin your AppDelegate.swift file. If you follow a tutorial, there should be a managedObjectContextin your AppDelegate.swiftfile already. Maybe you've missed this step. If this isn't the case, you should either add one by yourself or copy it.
不，它根本不应该改变。错误说明了这一点。managedObjectContext您的 AppDelegate.swift 文件中没有。如果您按照教程进行操作managedObjectContext，您的AppDelegate.swift文件中应该已经有一个。也许你错过了这一步。如果不是这种情况，您应该自己添加一个或复制它。
If you want to get a 'standard' managedObjectContextjust create a new Swift-Project and check the Use Core Datacheckbox during the creation:
如果您想获得“标准”，managedObjectContext只需创建一个新的 Swift 项目并Use Core Data在创建过程中选中复选框：
New -> File->Project-> Master-Detailview Application-> Use Core Data
If you are new to CoreData and Swift, try the tutorial from raywenderlichabout Swift and CoreData. It's easy and nicely written.
如果您是 CoreData 和 Swift 的新手，请尝试raywenderlich关于 Swift 和 CoreData的教程。这很容易而且写得很好。
