如何在swift2中从json读取数据 [英] how to read data from json in swift2

问题描述

我正在尝试从swift(2.2)中的json文件读取电子邮件:

I am trying to read email from a json file in swift(2.2) which is:

 { "employees" : [
  {
    "name": "sudhanshu",
    "email": "[e-mail]",
    "password": "password"
    "profilePic": ""
 },
 {
    "name": "prokriti",
    "email": "[e-mail]",
    "password": "password@123",
    "profilePic": ""
  }
]}

但是我收到错误消息"Error Domain = NSCocoaErrorDomain Code = 3840"字符128附近的转义控制字符."UserInfo = {NSDebugDescription =字符128附近的转义控制字符.}"我见过较早的帖子，但找不到确切的位置问题是?

But i am getting error " Error Domain=NSCocoaErrorDomain Code=3840 "Unescaped control character around character 128." UserInfo={NSDebugDescription=Unescaped control character around character 128.}" i have seen earlier posts but unable to find where exactly problem is??

if let path = NSBundle.mainBundle().pathForResource("Employees", ofType: "json") {
        if let data = NSData(contentsOfFile: path) {
            do {
                let jsonResult: NSDictionary = try NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers) as! NSDictionary

                if let error = jsonResult["error"] {
                    print("Error is: \(error)")
                } else {
                    if let person = jsonResult["email"] {
                        print(person) // dictionary[@"quotables"]
                    }
                }

            } catch let error as NSError {
             print("Error is: \(error)")
            }

        }
    }

提前谢谢！

推荐答案

您正尝试直接从字典中访问电子邮件密钥.而您需要首先从关键员工"那里访问数组&那么您需要从电子邮件"键中获取价值.

You are trying to access directly email key from the dictionary. while you need to first access array from the key "employees" & then you need to get value from "email" key.

if let path = NSBundle.mainBundle().pathForResource("Employees", ofType: "json") {
if let data = NSData(contentsOfFile: path) {
    do {
        let jsonResult: NSDictionary = try NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers) as! NSDictionary

        if let error = jsonResult["error"] {
            print("Error is: \(error)")
        } else {
            let person = jsonResult["employees"] as! NSArray
            for i in 0..<person.count
            {
                let dict = person.objectAtIndex(i) as! NSDictionary
                let strEmail = dict["email"] as! String
                print(strEmail)
            }
        }

    } catch let error as NSError {
        print("Error is: \(error)")
    }

}

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