错误域=NSCocoaErrorDomain 代码=3840 “无值".UserInfo={NSDebugDescription=无值.} [英] Error Domain=NSCocoaErrorDomain Code=3840 “No value.” UserInfo={NSDebugDescription=No value.}
问题描述
我正在学习 JSON.我在从 URL 解析 JSON 时遇到问题.错误是Error Domain=NSCocoaErrorDomain Code=3840No value." UserInfo={NSDebugDescription=No value.}"
I'm learning JSON. I have problem with parsing JSON from URL. The error is "Error Domain=NSCocoaErrorDomain Code=3840 "No value." UserInfo={NSDebugDescription=No value.}"
JSON 有效 - 我已经检查过了.这是 JSON 的结构:
JSON is valid - I've checked. This is structure of JSON:
[{"id":33,"name":"5","sort":2},{"id":34,"name":"6","sort":3},{"id":35,"name":"7","sortOrder":4}]
这是我的代码:导入 UIKit
And this is my code: import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let urlAsString = "http://www.url.address/"
let url = NSURL(string: urlAsString)!
let urlSession = NSURLSession.sharedSession()
let username = "admin"
let password = "admin"
struct Address {
let name: String?
let id: String?
let sortOrder: String?
init(dict: [String: AnyObject]) {
name = dict["name"] as? String
id = dict["id"] as? String
sortOrder = dict["sort"] as? String
}
}
let path = NSBundle.mainBundle().pathForResource("sections", ofType: "json")
let jsonData = NSData()
do {
if let jsonDic = try NSJSONSerialization.JSONObjectWithData(jsonData,
options: .MutableContainers) as? [String: AnyObject] {
let addr = Address(dict: jsonDic)
print("jsonDic")
}
} catch let error as NSError {
print(error)
}
}
func backButton(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: {})
}
}
推荐答案
您需要实际使用文件中的数据:
You need to actually use the data from the file:
<代码>守卫让路径 = NSBundle.mainBundle().pathForResource("sections", ofType: "json"),让 jsonData = NSData(contentsOfFile: path) else {致命错误(无法在主包中找到或加载部分文件")}做 {如果让部分 = 尝试 NSJSONSerialization.JSONObjectWithData(jsonData,选项:.MutableContainers)作为?[字符串:AnyObject] {//处理部分}...
guard let path = NSBundle.mainBundle().pathForResource("sections", ofType: "json"),
let jsonData = NSData(contentsOfFile: path) else {
fatalError("Cannot find or load the sections file in the main bundle")
}
do {
if let sections = try NSJSONSerialization.JSONObjectWithData(jsonData,
options: .MutableContainers) as? [String: AnyObject] {
// work with sections
}
...
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