在 Swift 中执行 POST 请求答案

【问题标题】：Perform POST request in Swift在 Swift 中执行 POST 请求
【发布时间】：2014-07-26 23:00:24
【问题描述】：

我正在尝试做这样的事情：

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://google.com"]];

request.HTTPMethod = @"POST";

NSString *stringData = @"some data";
NSData *requestBodyData = [stringData dataUsingEncoding:NSUTF8StringEncoding];
request.HTTPBody = requestBodyData;

NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];

这是我目前所拥有的：

var url = NSURL(string: "some url")
var request = NSMutableURLRequest(URL: url)
request.HTTPMethod = "POST"

var dataString = "some data"
var requestBodyData: NSData = dataString.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding) as NSData

request.HTTPBody = requestBodyData

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

println("sending request...")

connection.start()

然而，var requestBodyData: 行抛出第一块石头“无法将表达式的类型 NSData 转换为类型 NSData”

有人愿意称重吗？

【问题讨论】：

标签： ios post nsurlconnection swift

【解决方案1】：

stringByAddingPercentEscapesUsingEncoding 返回一个字符串而不是一个 NSData 对象。根据this的回答，你需要用这个来转换成NSData实例：

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

【讨论】：

【解决方案2】：

使用Alamofire发送HTTP POST请求

let request = NSMutableURLRequest(URL: NSURL(string: "https://www.google.com")!)
request.HTTPMethod = "POST"

let body = "email=\(email)&access_token=\(token)"
request.HTTPBody = body.dataUsingEncoding(NSUTF8StringEncoding)

Alamofire.request(request).responseJSON { response in

        NSLog("response.request: \(response.request)")  // original URL request
        NSLog("esponse.response: \(response.response)") // URL response

        switch response.result {
        case .Success:
            NSLog("Validation Successful")
        case .Failure(let error):
            // Logout
            NSLog("\(error), \(String(data: response.data!, encoding: NSUTF8StringEncoding))")
            return
        }

        // Save sip account information to NSUserdefaults
        if let json = response.result.value as? [String: AnyObject]{
            // Do your stuff
        } 
}

【讨论】：

使用 Alamofire 有什么好处？