ios 如何使用新的 Apple Swift 语言发布 JSON

How to post a JSON with new Apple Swift Language

提问by Thales P

I'm (trying to) learn the Swift's Apple language. I'm at Playground and using Xcode 6 Beta. I'm trying to do a simple JSON Post to a local NodeJS server. I already had googled about it and the major tutorials explain how to do it in a project, not at PLAYGROUND, than don't write stupid thinks like: "google it" or "it's obvious" or "look this link" or never-tested-and-not-functional-code

我正在（试图）学习 Swift 的 Apple 语言。我在 Playground 并使用 Xcode 6 Beta。我正在尝试对本地 NodeJS 服务器执行简单的 JSON Post。我已经用谷歌搜索过它，主要教程解释了如何在项目中而不是在 PLAYGROUND 中进行操作，而不是写一些愚蠢的想法：“谷歌它”或“很明显”或“看这个链接”或从不-测试和非功能性代码

This is what i'm trying:

这就是我正在尝试的：

var request = NSURLRequest(URL: NSURL(string: "http://localhost:3000"), cachePolicy: NSURLRequestCachePolicy.ReloadIgnoringLocalCacheData, timeoutInterval: 5)

var response : NSURLResponse?
var error : NSError?

NSURLConnection.sendSynchronousRequest(request, returningResponse: &response, error: &error)

I had tried:

我试过：

var dataString = "some data"

var request = NSMutableURLRequest(URL: NSURL(string: "http://posttestserver.com/post.php"))
request.HTTPMethod = "POST"

let data = (dataString as NSString).dataUsingEncoding(NSUTF8StringEncoding)

var requestBodyData: NSData = data
request.HTTPBody = requestBodyData

var connection = NSURLConnection(request: request, delegate: nil, startImmediately: false)

println("sending request...")
connection.start()

Thank you! :)

谢谢！:)

回答by Nate Cook

It looks like you have all the right pieces, just not in quite the right order:

看起来您拥有所有正确的部分，只是顺序不正确：

// create the request & response
var request = NSMutableURLRequest(URL: NSURL(string: "http://requestb.in/1ema2pl1"), cachePolicy: NSURLRequestCachePolicy.ReloadIgnoringLocalCacheData, timeoutInterval: 5)
var response: NSURLResponse?
var error: NSError?

// create some JSON data and configure the request
let jsonString = "json=[{\"str\":\"Hello\",\"num\":1},{\"str\":\"Goodbye\",\"num\":99}]"
request.HTTPBody = jsonString.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
request.HTTPMethod = "POST"
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")

// send the request
NSURLConnection.sendSynchronousRequest(request, returningResponse: &response, error: &error)

// look at the response
if let httpResponse = response as? NSHTTPURLResponse {
    println("HTTP response: \(httpResponse.statusCode)")
} else {
    println("No HTTP response")
}

回答by Garrett O'Grady

Nate's answer was great but I had to change the request.setvalue for it to work on my server

Nate 的回答很棒，但我必须更改 request.setvalue 才能在我的服务器上工作

// create the request & response
var request = NSMutableURLRequest(URL: NSURL(string: "http://requestb.in/1ema2pl1"), cachePolicy: NSURLRequestCachePolicy.ReloadIgnoringLocalCacheData, timeoutInterval: 5)
var response: NSURLResponse?
var error: NSError?

// create some JSON data and configure the request
let jsonString = "json=[{\"str\":\"Hello\",\"num\":1},{\"str\":\"Goodbye\",\"num\":99}]"
request.HTTPBody = jsonString.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
request.HTTPMethod = "POST"
request.setValue("application/json", forHTTPHeaderField: "Content-Type")

// send the request
NSURLConnection.sendSynchronousRequest(request, returningResponse: &response, error: &error)

// look at the response
if let httpResponse = response as? NSHTTPURLResponse {
    println("HTTP response: \(httpResponse.statusCode)")
} else {
    println("No HTTP response")
}

回答by CodeOverRide

Here is a little different approach using asynchronous request. You can use synchronous approach this way too but since everyone above used synchronous request, I thought show asynchronous request instead. Another thing is it seems cleaner and easier this way.

这是使用异步请求的一种不同的方法。你也可以用这种方式使用同步方法，但由于上面的每个人都使用同步请求，我认为显示异步请求。另一件事是这样看起来更干净、更容易。

    let JSONObject: [String : AnyObject] = [
        "name" : name,
        "address" : address,
        "phone": phoneNumber
    ]

    if NSJSONSerialization.isValidJSONObject(JSONObject) {
        var request: NSMutableURLRequest = NSMutableURLRequest()
        let url = "http://tendinsights.com/user"

        var err: NSError?

        request.URL = NSURL(string: url)
        request.HTTPMethod = "POST"
        request.cachePolicy = NSURLRequestCachePolicy.ReloadIgnoringLocalCacheData
        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
        request.HTTPBody = NSJSONSerialization.dataWithJSONObject(JSONObject, options:  NSJSONWritingOptions(rawValue:0), error: &err)

        NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue()) {(response, data, error) -> Void in
            if error != nil {

                println("error")

            } else {

                println(response) 

            }
        }
    }