Ios 当NSDictionary[]抛出EXC_BAD_指令运行时错误时，JSON的数据转换结果

在作为NSDictionary解析后，我在Swift代码中收到了以下JSON。在我的函数中，我试图将“results”块中的JSON对象提取为NSDIctionary[]，但这会引发运行时错误。我不明白为什么，因为就在几天前，它还在工作

{
"results": [
    {
        "id": "3",
        "name": "The National",
        "slug": "thenational",
        "facebook_url": "https://www.facebook.com/thenationalofficial/",
        "twitter_url": "https://twitter.com/The_National",
        "profile_image": "http://example.staging.com/media/profile_image/thumbnail_263x263/1352756032.jpg",
        "_type": "artist",
        "resource_uris": {
        }
    },
    {
        "id": "5",
        "name": "Mayer Hawthorne",
        "slug": "mayerhawthorne",
        "facebook_url": "https://www.facebook.com/MayerHawthorne",
        "twitter_url": "https://twitter.com/MayerHawthorne",
        "profile_image": "http://example.example.com/media/profile_image/thumbnail_263x263/1352755133.png",
        "_type": "artist",
        "resource_uris": {
        }
    },
    {
        "id": "20",
        "name": "I Play Maracas",
        "slug": "iplaymaracas",
        "facebook_url": "",
        "twitter_url": "",
        "profile_image": "http://staging.wedemand.com/images/en/img-list-home.gif",
        "_type": "artist",
        "resource_uris": {
            "_demanded_by": null,
            "demand_url": "http://ec2-54-86-17-163.compute-1.amazonaws.com/artists/20/?demand=1&access_token={}",
            "dismiss_url": "http://ec2-54-86-17-163.compute-1.amazonaws.com/artists/20/?demand=0&access_token={}"
        }
    },
    {
        "id": "35",
        "name": "Black SuperHeros",
        "slug": "blacksuperheros",
        "facebook_url": "",
        "twitter_url": "",
        "profile_image": "http://staging.example.com/images/en/img-list-home.gif",
        "_type": "artist",
        "resource_uris": {
        }
    },
    {
        "id": "49",
        "name": "Ayman Elgadi",
        "slug": "aymanelgadi",
        "facebook_url": "",
        "twitter_url": "",
        "profile_image": "http://staging.example.com/images/en/img-list-home.gif",
        "_type": "artist",
        "resource_uris": {
        }
    },
    {
        "id": "8874",
        "name": "Lauri",
        "slug": "lauri",
        "facebook_url": "http://www.facebook.com/hughlaurieblues",
        "twitter_url": "http://twitter.com/hughlaurieblues",
        "profile_image": "http://staging.example.com/media/profile_image/thumbnail_263x263/lauri_profilepic.jpg",
        "_type": "artist",
        "resource_uris": {
        }
    }
]
}

我的IOS Swift代码在被AFNetworking lib解析后接收到NSDictionary对象，并传递给将结果数组强制转换为NSDictionary[]的函数，该函数现在抛出运行时错误，而早些时候该错误仍然有效

(operation: AFHTTPRequestOperation!, responseObject: AnyObject!) in println("JSON: " + responseObject.description)

var jsonResult: NSDictionary = responseObject as NSDictionary

此jsonResult被传递给下面的函数，该函数尝试转换为NSDictionary[]

let allResults: NSDictionary[] = results["results"] as NSDictionary[]

更新： 我打印了results对象的类，因为它返回为uu NSCFDictionary

---

这里有一个关于这一点的讨论，说要像NSDictionary一样使用它，但在我的例子中它不起作用。

结果的值在JSON中不是字典，而是数组。你应该用这样的东西得到它

let allResults: NSArray = results["results"] as NSArray

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请提供一段代码，说明如何使用swiftTry在转换之前打印出其类来解析此json。尝试在转换之前打印'jsonResult'，它是否有'results'键，这意味着它是一个字典，而不是一个字典数组。查找“转换”，这不是您要做的。您正在执行从JSON字节到NSDictionary-r

NSArray

的数据转换。我已尝试将其转换为NSArray，但这也会引发运行时错误。什么？它不是一个数组数组，是吗？如果有的话，它应该是一个单一的

NSArray

，而不是它们的字典@srinivas尝试不使用

[]

@ujell嘿，谢谢！真棒，摆脱了运行时错误。非常感谢。