ios - Swift 中特殊的 JSON 解析

Question

关闭。这个问题需要多问 focused 。目前不接受答案。

---

想要改进此问题吗？更新问题，使其仅关注一个问题 editing this post .

已关闭 7 年前。

Improve this question

我想构建一个 iOS 应用程序，我需要为此 JSON 字符串创建一个仅显示内容的数组:

[ {"content":"hello"}, {"content":"hi"}, {"content":"how are you?"} ]

结果应如下所示:

["hello", "hi", "how are you?"]

如何在 Swift 中做到这一点？

这是我在 ViewController.swift 文件中的代码:

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let mList = "[{"content":"hello"},{"content":"hi"},{"content":"how are you?"}]"
        let data = mList!.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}

Answer 1

let mList = "[{\"content\":\"hello\"},{\"content\":\"hi\"},{\"content\":\"how are you?\"}]"
let JSONData = mList.dataUsingEncoding(NSUTF8StringEncoding)!
var json: Array<AnyObject>!
do {
    json = try NSJSONSerialization.JSONObjectWithData(JSONData, options: NSJSONReadingOptions()) as? Array
} catch {
    print(error)
}

var resultArray = [String]()
for item in json {
    if let content = item["content"] as? String {
        resultArray.append(content)
    }
}
print("resultArray: \(resultArray)")