Question

我正在通过alamofire提出请求，并将此作为回复：

{
success: true,
data: [
{
_id: "5615dd59e4b0d2d408b385ff",
name: "Exam Prep",
info: "Tools designed to increase students' performance on standardized tests",
active: true
},
{
_id: "5615dd75e4b0d2d408b38603",
name: "Mathematics",
info: "The study of topics such as quantity numbers, structure, space, and change",
active: true
},
{
_id: "5615dd8de4b0d2d408b38604",
name: "Science",
info: "Knowledge in the form of predictions about the universe",
active: true
},
{
_id: "5615dda5e4b0d2d408b38605",
name: "Language Arts",
info: "The study of languages, composition, and grammar",
active: true
}
]
}

使用通用对象序列化作为模板形式Alamofire的文档：http://cocoadocs.org/docsets/Alamofire/2.0.2/我的主题类有以下方法：

static func collection(response response: NSHTTPURLResponse, representation: AnyObject) -> [Subject] {
    var subjects: [Subject] = []

    if let representation = representation as? [[String: AnyObject]] {
        for subjectRepresentation in representation {
            if let subject = Subject(response: response, representation: subjectRepresentation) {
                subjects.append(subject)
            }
        }
    }

    return subjects
}

然而，if let representation =表示为什么？ [[String：AnyObject]]总是失败。我认为这与json数据在＆＃34;数据＆＃34;中有关。而不是根级对象，但我不知道如何告诉演员拔出＆＃34;数据＆＃34;要生成Subject类的实例的元素。帮助

Answer 1

您可以使用data提取valueForKeyPath元素：

static func collection(response response: NSHTTPURLResponse, representation: AnyObject) -> [Subject] {
var subjects: [Subject] = []

if let representation = representation.valueForKeyPath("data") as? [[String: AnyObject]] {
    for subjectRepresentation in representation {
        if let subject = Subject(response: response, representation: subjectRepresentation) {
            subjects.append(subject)
        }
    }
}

return subjects
}

Answer 2

将representation投射为[String: AnyObject]

let representation = representation as? [String: AnyObject]

Alamofire从NSMutableDictionary到String of String：Anyobject

2 个答案: