Swift 信号 SIGABRT 错误答案

【问题标题】：Swift signal SIGABRT errorSwift 信号 SIGABRT 错误
【发布时间】：2016-12-05 22:04:50
【问题描述】：

代码如下：

 func setupData() {

    clearData()

    let delegate = UIApplication.shared.delegate as? AppDelegate

    if let context = delegate?.persistentContainer.viewContext {



        let mark = NSEntityDescription.insertNewObject(forEntityName: "Friend", into: context) as! Friend
        mark.name = "Vuyo Nkabinde"
        mark.profileImageName = "zuckprofile"


        let message = NSEntityDescription.insertNewObject(forEntityName: "Message", into: context) as! Message
        message.friend = mark
        message.text = "Hello, my name is Mark. Nice to meet you..."
        message.date = NSDate()

        let steve = NSEntityDescription.insertNewObject(forEntityName: "Friend", into: context) as! Friend
        steve.name = "Steve Jobs"
        steve.profileImageName = "steve_profile"

        let messagesSteve = NSEntityDescription.insertNewObject(forEntityName: "Message", into: context) as! Message
        messagesSteve.friend = steve
        messagesSteve.text = "Code is the most innovative company I have ever seen..."
        messagesSteve.date = NSDate()

        do {
        try(context.save())
        } catch let err {
            print(err)

        }

    }

我的问题是 let mark = NSEntityDescription.insertNewObject(forEntityName: "Friend", into: context) as! Friend 行，它是用 swift 2 编写的，我将所有代码都更改为 swift 3，但这一行给了我一个信号 SIGABRT 错误。

【问题讨论】：

请检查我的答案

标签： swift core-data sigabrt

【解决方案1】：

看起来访问托管对象的接口从 swift2 更改为 swift3。正如question/answer 中所解释的那样，在您的情况下，您需要：

 let mark = Friend(context: context)
 mark.name = "Vuyo Nkabinde"
 mark.profileImageName = "zuckprofile"

【讨论】：

【解决方案2】：

基于我的 Swift 3.0 应用：

let entity = NSEntityDescription.entity(forEntityName: "Friend", in: context)
let mark = Friend(entity: entity!, insertInto: context)
mark.name = "Vuyo Nkabinde"
mark.profileImageName = "zuckprofile"

[etc...]

【讨论】：

【解决方案3】：

在 Swift 3 中应该是这样的：

let employee = NSEntityDescription.insertNewObjectForEntityForName("Friend", inManagedObjectContext: context) as! Friend

请检查Swift 3的语法，如上。

希望有帮助

【讨论】：