json - 解析 JSON - Swift

Question

我正在使用以下源代码从 Google map 中检索一些数据:

import UIKit
import GoogleMaps
import GooglePlaces
import SwiftyJSON

class Place /*: NSObject*/ {
    let name: String

    init(diction:[String : Any])
    {
        let json = JSON(diction)
        name = json["name"].stringValue //as! String       
    }
}

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        var urlString = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?&location=54.507514,-0.073603&radius=1000&name=Specsavers&name=Opticians&key=AIzaSyAcXLd8jotAyIOgKYqhYbL703BIibXkd-M"

       guard let url = URL(string: urlString) else {return}

        URLSession.shared.dataTask(with: url) {(data, response, error) in

            if let content = data {
                do {
                    let json = try JSONSerialization.jsonObject(with: content, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject
                    if let results = json["results"] as? [[String : Any]] {
                        var places = [Place]()
                        for place in results {
                            print("HERE0: " place)
                            places.append(Place(diction: place))
                        }
                        print("HERE1:", places)
                    }
                    else {
                        print("return")
                    }

                }
                catch{

                }
            }
        }.resume()

    }

但是当我尝试打印地点时，我得到以下响应:

2017-11-13 11:16:56.887909+0000 Trial[3911:127944] [BoringSSL] Function boringssl_context_get_peer_sct_list: line 1757 received sct extension length is less than sct data length

我从 HERE1 得到这个输出:

HERE1: [Trial.Place](我的xcode项目命名为Trial)

虽然我从 HERE0 得到了正确的 json 文件。

为什么我无法从 Google Places 正确检索商店名称？

Answer 1

您的错误是，places 实际上是一个 Place 类数组。所以当你打印出来时你应该指定一个索引。因为它是一个类数组，所以在索引之后你应该输入你想看到的属性。

我重构了你的代码，你可以使用它。

你的类文件

class Place /*: NSObject*/ {
let name: String

init(diction:[String : Any])
{
    self.name = diction["name"] as! String
}
}

你的 json 解析

 var places = [Place]() //do it outside of the viewDidload


 let urlString = URL(string: "https://maps.googleapis.com/maps/api/place/nearbysearch/json?&location=51.507514,-0.073603&radius=1000&name=Specsavers&name=Opticians&key=AIzaSyAcXLd8jotAyIOgKYqhYbL703BIibXkd-M")

    let session = URLSession.shared
    let task = session.dataTask(with: urlString!) { (data, response, err) in
        if let data = data {
            do {
                let json = try JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions.mutableLeaves) as! Dictionary<String,Any>
                if let results = json["results"] as? [[String:Any]] {
                    for place in results {
                        self.places.append(Place(diction: place))
                        print(self.places[0].name)
                    }
                    print(self.places[0].name)
                }
            }catch let err{
                print(err)
            }

        }
    }
    task.resume()