使用http请求快速发布到php

Question

尝试将文本字段中输入的变量发送到 php 脚本以写入 sql 数据库。尝试使用 HTTP 请求

@IBAction func submit(_ sender: AnyObject) {

    let requestURL = NSURL(string: "***************")

    let request = NSMutableURLRequest(url: requestURL! as URL)

    request.httpMethod = "POST"

    let song=txt1.text!
    let artist=txt2.text!
    let album=txt3.text!
    let year=txt4.text!
    let genre=txt5.text!


    let songPost = "song=" + (song as String)
    let artistPost = "&artist=" + (artist as String)
    let albumPost = "&album=" + (album as String)
    let yearPost = "&year=" + (year as String)
    let genrePost = "&genre=" +  (genre as String)

    request.httpBody = songPost.data(using: String.Encoding.utf8);
    request.httpBody = artistPost.data(using: String.Encoding.utf8);
    request.httpBody = albumPost.data(using: String.Encoding.utf8);
    request.httpBody = yearPost.data(using: String.Encoding.utf8);
    request.httpBody = genrePost.data(using: String.Encoding.utf8);
    NSURLConnection.sendAsynchronousRequest(request as URLRequest, queue: OperationQueue.mainQueue)

我在阅读代码的最后一行时遇到错误:调用中参数“completion hander”缺少参数。

不知道这是什么意思。

Answer 1

这里的错误其实非常明显。此方法有一个名为 completionHandler 的第三个参数，您缺少它。 Documentation .用这个替换你的最后一行:

NSURLConnection.sendAsynchronousRequest(request as URLRequest, queue: OperationQueue.mainQueue)
{
  response, data, error in
  // handle response here
}