Question

我想从本地JSON文件获取数据。看起来像：

[
[
{
  "link": "link1",
  "answers": [
    "answer1",
    "answer2",
    "answer3",
    "answer4",
    "answer5"
  ],
  "questions": "question1"
},
{
  "link": "link2",
  "answers": [
    "answer1",
    "answer2",
    "answer3",
    "answer4",
    "answer5"
  ],
  "questions": "question2"
}
]
]

如何分别考虑每个元素？我该如何分别回答每个答案？我想在表格视图中使用答案。 indexPath.row [1] = answer1 indexPath.row [2] = answer2 ...

let url = Bundle.main.url(forResource: "info", withExtension: "json")!
    do {
        let jsonData = try Data(contentsOf: url)
        let json = try JSONSerialization.jsonObject(with: jsonData)
        print(json)

        //let current = json["title"] as! [String: [String:Any]]

        //for (key, currency) in current {
            //let quest = currency["title"] as! String
            //let img = currency["image"] as! String
            //let ans = currency["answers"] as! [String]
        //}
    }
    catch {
        print(error)
    }

}

Answer 1

您必须注意JSON结构以获取正确的值。请参见下面的代码片段，以了解如何在JSON中解决您的问题。

    let url = Bundle.main.url(forResource: "File", withExtension: "txt")!
    do {
        let jsonData = try Data(contentsOf: url)
        let json = try JSONSerialization.jsonObject(with: jsonData) as! [[[String: Any]]]

        if let question1 = json.first?[0] {
            print( question1["link"] as! String)
        }

        if let question2 = json.first?[1] {
            print( question2["link"] as! String)
        }
    }
    catch {
        print(error)
    }

因此，现在您知道如何获取实际数据。您应该创建一些Question类。然后，您应该保留从文件中解析出的问题列表，并将该列表用于TableView。

如何快速从本地JSON文件获取数据？

1 个答案: