Question

我有来自api响应的以下json字符串...

    ["products": <__NSArrayI 0x7fa103868000>(
    {
        barcode = HDz;
        "category_json" = "[{\"category_name\":\"Home\",\"category_id\":\"2\"}]";
        "created_at" = "2018-04-09 12:56:35";
        "discount_price" = "5000.00";
.....

我正在解析这个回复......

if httpResponse.statusCode == 200 {

                        print("SUCCESS!")

                        if let result = response.result.value as? [String:Any] {
                            print(result)

                            guard let products = result["products"] as? [[String:Any]] else {
                                return
                            }

                            for value in products {
                                if let barcode = value["barcode"] as? String {
                                    self.theBarcode = barcode
                                }

                                if let discountPrice = value["discount_price"] as? String {
                                    self.theDiscountRate = discountPrice
                                }
                                //Issue arises here
                                guard let category = value["category_json"] as? [[String: Any]] else {
                                    return
                                }

一切正常。但当我到达类别部分时，控件返回并发生退出。不知道为什么会这样......

Answer 1

"category_json":"[{\"category_name\":\"Home\",\"category_id\":\"2\"}]"

JSON中的JSON（字符串化）。

你的工具是什么：
Dictionary or Array对象＆lt; =（通过）JSONSerialization）=＆gt; Data对象
String对象＆lt; =＆gt; Data对象

因此您需要使用JSONSerialization()再次解析它。

let categoryStringified = "[{\"category_name\":\"Home\",\"category_id\":\"2\"}]"
//in your case let categoryStringified = value["category_json"] as String
let categoryStringifiedData = categoryStringified.data(using: .utf8)
let categories = try? JSONSerialization.jsonObject(with: categoryStringifiedData!, options: []) as! [[String: Any]]
print("categories: \(categories)")
for aCategory in categories {
   ...
}

旁注：为了逻辑起见，我强行打开包装，没有在catch上执行try?等。您已经知道如何管理它们（您使用guard let，if let等。）

解析服务器响应中的字符串数组的问题

1 个答案: