如何使用Swift 2 + XCode 7 + iOS 9获取和解析JSON [英] How To Fetch and Parse JSON Using Swift 2 + XCode 7 + iOS 9

问题描述

正在寻找与Swift 2和iOS 9联网的有用教程，但似乎该主题在线上没有内容.我已经看过WWDC会话与NSURLSession联网，但是我无法适应iOS9的新API具有异步方式来获取和解析JSON数据.我尝试过的:

Was looking for useful tutorials for networking with Swift 2 and iOS 9, but it seems that topic has no content online. I have watched the WWDC session Networking with NSURLSession But I couldn't adapt the new API of iOS9 to have an asynchronous way to fetch and parse JSON data. What I have tried:

    do {
        if let url = NSURL(string: "site/api.php?option=fetchOps"),
            let data = NSData(contentsOfURL: url),
            let jsonResult = try NSJSONSerialization.JSONObjectWithData(data, options: []) as? [[String:AnyObject]] {

        }
    } catch let error as NSError {
        print(error.description)
    }

请分享您在iOS9和Swift2上的联网经验，是否有任何最佳实践，例如用于联网和解析的Singleton类，也许是ORM?

Please share your experience with networking on iOS9 and Swift2, any best practices maybe a Singleton class for networking and parsing maybe an ORM ?

推荐答案

轻松为您提出请求的方式:

如何在Swift中发出HTTP请求?

或者如果您想自己发送请求:

Or If you want to send request by your own:

Swift 2中的HTTP POST错误处理

仅作为示例，在这里我已经转换了NSString

Just as an example, here I've converted a NSString

首先将NSString转换为NSDictionary

First of all convert the NSString to NSDictionary

static func convert(src: NSString) -> NSDictionary {
    // convert String to NSData
    let data = src.dataUsingEncoding(NSUTF8StringEncoding)
    var error: NSError?

    // convert NSData to 'AnyObject'
    let anyObj: AnyObject?
    do {
        anyObj = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions(rawValue: 0))
    } catch let error1 as NSError {
        error = error1
        anyObj = nil
    }

    if(error != nil) {
        // If there is an error parsing JSON, print it to the console
        print("JSON Error \(error!.localizedDescription)")
        //self.showError()
        return NSDictionary()
    } else {

        return anyObj as! NSDictionary
    }

}

然后像这样使用它

if  let name = dictionary["name"] as? String {
    self.name = name
}

您可以使用转换后的JSON来创建这样的对象

You can use the converted JSON to make an object like this

import Foundation

class Student {
var name="";

init(dictionary: NSDictionary) {
    let _NAME = "name"
    if  let name = dictionary[_NAME] as? String {
        self.name = name
    }
}

}

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