致命错误：NSArray元素无法匹配Swift数组元素类型 [英] fatal error: NSArray element failed to match the Swift Array Element type

问题描述

突然我开始得到运行时错误，

Suddenly I'v started getting run time error as,

fatal error: NSArray element failed to match the Swift Array Element type

我将我的数组声明为，

var myArray : [CUSTOM_CLASS] = [CUSTOM_CLASS]()

现在，在我的服务器响应成功块中，

Now, in my server response success block I have,

self.myArray = dicResponse["data"]! as Array

println(self.myArray) // FATAL ERROR HERE

升级到Xcode6 Beta6之前哪个工作正常？

Which was working perfect before upgrading to Xcode6 Beta6

FYI : dicResponse["data"]! // is verified as valid

（抱歉指向错误的地方！）

(Sorry to pointing wrong place before!)

已解决：

不知道但我做了一些更改并且有效，

Dont know but I'd made some changes and it works,

var myArray = [AnyObject]()

self.myArray = dicResponse["data"]! as [AnyObject]

推荐答案

如果我可以补充Teejay的答案一些进一步的信息此错误：

If I could supplement Teejay's answer with some further information. This error:

fatal error: NSArray element failed to match the Swift Array Element type

是由类型不匹配引起的。

is caused by a type mismatch.

例如，对你的Swift数组类型进行强制转换：

For example having cast to your Swift array type:

    myPersonList = aDictionary["persons"] as [Person]

根据键<$访问aDictionary中的值c $ c>人员，Swift希望收到 Person类型数组。这将编译并将毫无问题地执行。

Accessing the value in aDictionary based upon key "persons", Swift expects to receive an array of type Person. This will compile and will execute without issue.

但是，稍后在代码中访问 myPersonList 数组元素时，如果类型不符合规定 - 在我的示例人 - 然后执行将因上述错误而崩溃。

However, later in your code when accessing the myPersonList array element, if the type is not as specified - in my example Person - then execution will crash with the error above.

底线：你几乎肯定在演员表中指定了错误的类型。检查你的字典对象，看看它真正包含的内容。

这篇关于致命错误：NSArray元素无法匹配Swift数组元素类型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！