Arrays 如何使用JSON文件中的数据填充数组

我正在开发一个应用程序，它可以读取购物中心的名称和坐标。然后将其与用户的当前位置进行比较，以便用户只能看到周围最近的购物中心。出于这个原因，我想将所有的名称和位置放入2个数组中，并将它们与用户的当前位置进行比较。然后，我将为segue准备它们，并将它们发送到我的

TableViewController

，在那里我将在不同的单元格中显示它们

我是斯威夫特的新手，如果有人能帮我做到这一点，我会很高兴

我的JSON文件是：

{
    "People": {
        "Person0": {
            "A1": "New York",
            "B1": "ShoppingMall1",
            "C1": "43.0757",
            "D1": "23.6172"
        },

        "Person1": {
            "A1": "London",
            "B1": "ShoppingMall2",
            "C1": "44.0757",
            "D1": "24.6172"
        },
        "Person2": {
            "A1": "Paris",
            "B1": "ShoppingMall3",
            "C1": "45.0757",
            "D1": "25.6172"
        },
        "Person3": {
            "A1": "Bern",
            "B1": "ShoppingMall4",
            "C1": "41.0757",
            "D1": "21.6172"
        },
        "Person4": {
            "A1": "Sofia",
            "B1": "ShoppingMall5",
            "C1": "46.0757",
            "D1": "26.6172"

        }
    }
}

没有第三方库： Swift 3:

func convertStringToDictionary(text: String) -> [String:AnyObject]? {
    if let data = text.data(using: String.Encoding.utf8) {
        do {
            return try JSONSerialization.jsonObject(with: data, options: []) as? [String:AnyObject]
        } catch let error as NSError {
            print(error)
        }
    }
    return nil
}

func convertStringToDictionary(text: String) -> [String:AnyObject]? {
    if let data = text.dataUsingEncoding(NSUTF8StringEncoding) {
        do {
            return try NSJSONSerialization.JSONObjectWithData(data, options: []) as? [String:AnyObject]
        } catch let error as NSError {
            print(error)
        }
    }
    return nil 
}

Swift 2:

func convertStringToDictionary(text: String) -> [String:AnyObject]? {
    if let data = text.data(using: String.Encoding.utf8) {
        do {
            return try JSONSerialization.jsonObject(with: data, options: []) as? [String:AnyObject]
        } catch let error as NSError {
            print(error)
        }
    }
    return nil
}

func convertStringToDictionary(text: String) -> [String:AnyObject]? {
    if let data = text.dataUsingEncoding(NSUTF8StringEncoding) {
        do {
            return try NSJSONSerialization.JSONObjectWithData(data, options: []) as? [String:AnyObject]
        } catch let error as NSError {
            print(error)
        }
    }
    return nil 
}

然后你就有了一本字典，你可以像这样接触你的人民：

let dict = convertStringToDictionary(jsonText)
print(dict["People"])

{
    "People": [{
            "A1": "New York",
            "B1": "ShoppingMall1",
            "C1": "43.0757",
            "D1": "23.6172"
        },
        {
            "A1": "London",
            "B1": "ShoppingMall2",
            "C1": "44.0757",
            "D1": "24.6172"
        }, {
            "A1": "Paris",
            "B1": "ShoppingMall3",
            "C1": "45.0757",
            "D1": "25.6172"
        }, {
            "A1": "Bern",
            "B1": "ShoppingMall4",
            "C1": "41.0757",
            "D1": "21.6172"
        }, {
            "A1": "Sofia",
            "B1": "ShoppingMall5",
            "C1": "46.0757",
            "D1": "26.6172"

        }
    ]
}

对于json，您不能拥有数组，因为您应该像这样更改json：

let dict = convertStringToDictionary(jsonText)
print(dict["People"])

{
    "People": [{
            "A1": "New York",
            "B1": "ShoppingMall1",
            "C1": "43.0757",
            "D1": "23.6172"
        },
        {
            "A1": "London",
            "B1": "ShoppingMall2",
            "C1": "44.0757",
            "D1": "24.6172"
        }, {
            "A1": "Paris",
            "B1": "ShoppingMall3",
            "C1": "45.0757",
            "D1": "25.6172"
        }, {
            "A1": "Bern",
            "B1": "ShoppingMall4",
            "C1": "41.0757",
            "D1": "21.6172"
        }, {
            "A1": "Sofia",
            "B1": "ShoppingMall5",
            "C1": "46.0757",
            "D1": "26.6172"

        }
    ]
}

---

建议：不要使用带有PersonX键的字典，而是使用JSON中的person数组。非常感谢您的回答。一个问题：您将JSON文件的名称写入何处，以便应用程序知道从哪个JSON文件获取数据。这取决于您的JSON是在应用程序包中还是从服务器下载的。这是从URL获取的link@IvanSosev阅读此指南：谢谢，我可以做到，但我仍然无法在字典中找到确切的内容。我必须比较位置，如果我比较整个字典，我还将比较保存的名称。我不想比较它们，我只需要JSON文件中的C1和D1，名称A1和B1必须显示在另一个字典中