NSURLSession使用get发送参数 [英] NSURLSession send parameters with get

问题描述

我正在尝试从php解析信息，但是我需要发送一个字典参数，所以我尝试的东西...我看到教程，例子，但我被困，所以我回到开始：（它是什么这样做的好方法？）

I'm trying to parse information from a php, but i need to send a dictionary parameter so i try things ... i saw tutorials,examples but i'm stuck so i went back to the start: (What it's the good way for do this?)

       func asd(){
    let urlPath = "http://xxxxx.php"

    let url: NSURL = NSURL(string: urlPath)

    let request = NSMutableURLRequest(URL: url)
    request.HTTPMethod = "GET"
    var parm = ["id_xxxx": "900"] as Dictionary


    //I THINK MY PROBLEM IT'S HERE! i dont know how to link parm with session, i try is with session.uploadTaskWithRequest(<#request: NSURLRequest?#>, fromData: <#NSData?#>) but doesn't work

    let session = NSURLSession.sharedSession()
    let task = session.dataTaskWithURL(url, completionHandler: {data, response, error -> Void in
        println("Task completed")
        if(error) {
            // If there is an error in the web request, print it to the console
            println(error.localizedDescription)
        }
        var err: NSError?
        var jsonResult = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: &err) as NSDictionary
        if(err?) {
            // If there is an error parsing JSON, print it to the console
            println("JSON Error \(err!.localizedDescription)")
        }
        println(jsonResult.debugDescription)
        let results: NSArray = jsonResult["x"] as NSArray
        dispatch_async(dispatch_get_main_queue(), {
            self.tableData = results
            self.OfertaGridViewLista!.reloadData()
            })
        })
    task.resume()
}

谢谢！

推荐答案

GET数据需要是url的查询字符串的一部分。某些方法将接受POST / PUT请求的参数字典，但如果您使用GET方法，这些方法将不会为您添加字典。

GET data needs to be part of the url's query string. Some methods will accept a dictionary of parameters for POST/PUT requests, but these methods will not add the dictionary to the url for you if you're using the GET method.

如果您希望将词典中的GET参数保留在清晰度或一致性中，请考虑向您的项目添加如下所示的方法：

If you'd like to keep your GET parameters in a Dictionary for cleanliness or consistency, consider adding a method like the following to your project:

func buildQueryString(fromDictionary parameters: [String:String]) -> String {
    var urlVars:[String] = []

    for (k, value) in parameters {
        if let encodedValue = value.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet()) {
            urlVars.append(k + "=" + encodedValue)
        }
    }

    return urlVars.isEmpty ? "" : "?" + urlVars.joinWithSeparator("&")
}

此方法将采用一个字典的键/值对，并返回一个可以附加到您的网址的字符串。

This method will take a dictionary of key/value pairs and return a string you can append to your url.

例如，如果您的API请求允许多个请求方法（GET / POST / etc） ）你只需要将这个查询字符串附加到你的基本api url中，以获取GET请求：

For example, if your API requests allow for multiple request methods (GET/POST/etc.) you'll only want to append this query string to your base api url for GET requests:

if (request.HTTPMethod == "GET") {
    urlPath += buildQueryString(fromDictionary:parm)
}

如果您只是提出GET请求，则无需检查您将要使用哪种方法来发送数据。

If you're only making GET requests, there's no need to check for which method you'll be using to send your data.

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