xcode - 网络请求失败

Question

我刚刚开始快速，我正在尝试发出这样的发布请求:

import UIKit

class ViewController: UIViewController {


    @IBOutlet var txtEmail: UITextField!
    @IBOutlet var txtPassword: UITextField!
    @IBOutlet var btnLogin: UIButton!


    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    @IBAction func btnSignIn(sender: AnyObject) {
        let session = NSURLSession.sharedSession()
        let url = NSURL(string: "http://temp.com/api/v1/login")!
        let request = NSMutableURLRequest(URL: url)
        request.HTTPMethod = "POST"
        let task = session.dataTaskWithRequest(request) {
            (data, response, error) in
            guard let data = data else {print(error); return}

            let result = NSString(data: data, encoding: NSUTF8StringEncoding)
            print(result)

        }
        task.resume()
    }

}

当我在 Xcode 中启动模拟器时，它显示构建成功，然后在以下情况下崩溃:

class AppDelegate:

消息:

Thread 1: signal SIGABRT

我做错了什么？当我在 Playground 上测试它时，它有效!

Answer 1

看起来它在 AppDelegate 中崩溃了，如果没有看到其中的代码，我将无法准确地告诉您问题是什么。

如果删除 btnSignIn 方法中的代码，它还会崩溃吗？

我通常像这样处理我的 POST 请求:

let session = NSURLSession.sharedSession()
let url = NSURL(string: urlString)
let request = NSMutableURLRequest(URL: url!)
request.HTTPMethod = "POST"

// fill the request body, my API accepts JSON params
if let jsonData = try? NSJSONSerialization.dataWithJSONObject(parameters, options: .PrettyPrinted) {
    request.HTTPBody = jsonData
} else {
    print("error sending params as JSON, params: \(parameters)")
}

let task = session.dataTaskWithRequest(request) { (data, response, error) in
    self.handleResponse(request, data: data, response: response, error: error, completionHandler: completionHandler)
}

task.resume()