正在将 Swift 连接到 php 服务器

Question

我正在尝试 post 从 swift 到 php 然后 return json 编码数据返回 swift。

然而，print(task.response)为零。我的 link 做了它应该做的，但我的应用程序仍然以 nil 响应。知道为什么吗？

let request = NSMutableURLRequest(URL: NSURL(string: "https://www.flashkase.com/API/createAccount.php")!)
request.HTTPMethod = "POST"
let postString = "username=frogg222"
request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding)
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) { data, response, error in
    guard error == nil && data != nil else { // check for fundamental networking error
        print("error=\(error)")
        return
    }

    if let httpStatus = response as? NSHTTPURLResponse where httpStatus.statusCode != 200 { // check for http errors
        print("statusCode should be 200, but is \(httpStatus.statusCode)")
        print("response = \(response)")
    }

    let responseString = String(data: data!, encoding: NSUTF8StringEncoding)
    print("responseString = \(responseString)")
}
task.resume()
print(task.response)

还有我的 PHP 文件

<?php 
include($_SERVER["DOCUMENT_ROOT"] . "/inc/database.php");
$arr = [];

$arr[] = 'Reporting for duty';

if($_SERVER['REQUEST_METHOD'] == 'POST'){
    $arr[] = 'Post received';
    $arr[] = $_POST['username'];
}

echo json_encode($arr);
?>

更新：完成后如何查看数据？如果我取消对 sleep(3) 的注释，它将显示结果...但这显然不理想。

func postToServer(postURL: String, postString: String) {

    let request = NSMutableURLRequest(URL: NSURL(string: postURL)!)
    request.HTTPMethod = "POST"
    request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding)

    let task = NSURLSession.sharedSession().dataTaskWithRequest(request){
        data, response, error in 

        print("\(data), \(response), \(error)")

    }
    task.resume()
    //sleep(3)
}


let sendURL: String = "https://www.flashkase.com/API/createAccount.php"
let sendData: String = "username=frogg222&email=fake123@gmail.com&password=fake1234"

postToServer(sendURL,postString: sendData)

Answer 1

dataTaskWithRequest 是一个异步操作。在任务开始后立即打印响应代码显然会打印 nil，因为它还没有时间获取值。完成处理程序已经有一个可以使用的 response 对象，因此在您的完成处理程序中，调用 print(response) 查看属性并尝试获取响应代码。

正在将 Swift 连接到 php 服务器

Connecting Swift with php server

swift

swift2