类型不符合协议序列类型-Swift-typedoesnotconformtoprotocolSequenceType-Swift

From my swift app I'm fetching data from a webservice. Data comes as an array:

从我的快速应用程序，我正在从Web服务获取数据。数据以数组形式出现：

{"hashtags": ["first", "second"]}

I want to put every hashtag in a separate row of my UITableView. I have the logic to do that, but first - I'm getting werid error while parsing data.

我想把每个hashtag放在我的UITableView的一个单独的行中。我有逻辑做到这一点，但首先 - 我在解析数据时遇到了错误的错误。

I wrote a custom function:

我写了一个自定义函数：

class SingleHashtag: NSObject {

    var hashtagText: [String]

    init(hashtagText: [String]) {
        self.hashtagText = hashtagText
        super.init()
    }

    class func fromJSON(json: JSON) -> SingleHashtag? {
        let hashtagText:[String] = json["hashtags"].arrayValue.map { $0.stringValue}
        return SingleHashtag(hashtagText: hashtagText)
    }
}

and then in my main class I have:

然后在我的主要课程中我有：

Alamofire.request(.GET, "\(serverURL)/hashtags"/*, headers: headers*/)
        .validate()
        .responseJSON { response in
            print(response.description)
            switch response.result {
            case .Success:
                dispatch_async(dispatch_get_main_queue(),{
                    self.items.removeAllObjects()
                    if let jsOnData= response.result.value as? [[String: AnyObject]] {
                        for hashtag in jsonData {
                            if let userHashtags = SingleHashtag.fromJSON(JSON(hashtag)){
                                for hash in userHashtags {
                                    self.items.addObject(hash)
                                    self.hashtagTable.reloadData()
                                }
                            }
                        }
                    }
                    self.hashtagTable.reloadData()
                })
            case .Failure(let error):
                print(error)
            }
    }

but this line:

但这一行：

for hash in userHashtags {

throws an error during compilation:

编译时抛出错误：

type SingleHashtag does not conform to protocol 'SequenceType'

I tried adding as AnyObject but that didn't help. Can you tell me what might be wrong here?

我尝试添加为AnyObject，但这没有帮助。你能告诉我这里可能有什么问题吗？

1 个解决方案

var items = [String]()

Alamofire.request(.GET, "\(serverURL)/hashtags"/*, headers: headers*/)
    .validate()
    .responseJSON { response in
        print(response.description)
        switch response.result {
        case .Success:
            dispatch_async(dispatch_get_main_queue(),{
                self.items.removeAll()

                //cast the jsonData appropriately, then grab the hashtags
                if let jsOnData= response.result.value as? [String: [String]],
                    let hashtags = jsonData["hashtags"] {

                    //hashtags is now type [String], so you can loop
                    //through without the error and add the strings to 'items'
                    for hashtagText in hashtags {
                        self.items.append(hashtagText)
                        self.hashtagTable.reloadData
                    }
                }
            })
        case .Failure(let error):
            print(error)
        }
}