Question

我正在使用如下所示的Json服务器响应数据我使用模型类获得了所有键值对，并且无法只获得一个键值对街道任何人都可以帮助我如何获取街道键值对吗？

这是我的Json数据

{
  "address": {
    "city": "chennai",
    "firstname": "sommesh",
    "lastname": "s",
    "email": "test@gmail.com",
    "postcode": "43",
    "street": [
      "[No: 14; 8th cross street]"
    ],
    "country_id": "US",
    "region_code": "CA",
    "region_id": "12",
    "telephone": "8756467654",
    "sameAsBilling": 1,
    "region": "California",
    "prefix": "",
    "company": "Test Company"
  }
}

这是我的模型类代码

struct GuestAddress {

        let id : Int
        let region : String
        let regionId : Any
        let regionCode : String
        let countryId : String
        let company : String
        let telephone : Any
        let postCode : Any
        let city : String
        let firstName : String
        let lastName : String
        let email : String
        let sameAsBilling : Any
        let saveInAddressBook : Any
        var street : [String]

        init(dict : [String:Any]) {
            self.id = dict["id"] as! Int
            self.region = dict["region"]! as! String
            self.regionId = dict["region_id"]!
            self.regionCode = dict["region_code"]! as! String
            self.countryId = dict["country_id"]! as! String
            self.company = dict["company"]! as! String
            self.telephone = dict["telephone"]! as! String
            self.postCode = dict["postcode"]!
            self.city = dict["city"]! as! String
            self.firstName = dict["firstname"]! as! String
            self.lastName = dict["lastname"]! as! String
            self.email = dict["email"]! as! String
            self.sameAsBilling = dict["same_as_billing"]!
            self.saveInAddressBook = dict["save_in_address_book"]!
            let guestStreet = dict["street"] as! [String]
            var streetArr = street
            for item in guestStreet  {
                streetArr.append(item)
            }
            street = streetArr
        }
      }

Here is my postman data image

Answer 1

首先初始化变量

var street：[String] = []

因为在这里，你宣布了

var street：[String]

从未初始化，在你写完之后

var streetArr = street

这意味着“streetArr”也没有初始化。所以

streetArr.append（项目）什么都不做。

Answer 2

你有多余的代码工作。

更正如下：

 var street : [String] = []

init(dict : [String:Any]) {

     :
     :
     :
     :
     let guestStreet : [String] = dict["street"] as! [String] //2. here, guestStreet is the array of address.

 // 3. Print guestStreet
 //[ "[No: 14; 8th cross street]" ]

 // get required result

for item in guestStreet  {

    var address = item
    address.remove(at: address.startIndex)  //4. remove first brace
    address = String(address.characters.dropLast()) //5. remove last brace
    street.append(address) //6. Append address

}

print(street.first!) //7.  Output

多数民众赞成。

<强>输出：

无法在swift 3中获取Json响应中的键值对？

2 个答案: