Question

我有一些代码从文本框中获取文本并通过POST消息将其发送到服务器，然后服务器将其发送到电子邮件地址。

class ViewController: UIViewController {
@IBOutlet weak var emailText: UITextView!


override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

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

func sendEmail() {

    let url = NSURL(string:"http://www.fakewebsite.com/email.php")
    let cachePolicy = NSURLRequestCachePolicy.ReloadIgnoringLocalCacheData
    var request = NSMutableURLRequest(URL: url!, cachePolicy: cachePolicy, timeoutInterval: 2.0)
    request.HTTPMethod = "POST"

    // set Content-Type in HTTP header
    let boundaryConstant = "----------V2ymHFg03esomerandomstuffhbqgZCaKO6jy";
    let contentType = "multipart/form-data; boundary=" + boundaryConstant
    NSURLProtocol.setProperty(contentType, forKey: "Content-Type", inRequest: request)

    // set data
    var dataString = emailText.text
    let requestBodyData = (dataString as NSString).dataUsingEncoding(NSUTF8StringEncoding)
    request.HTTPBody = requestBodyData

    // set content length
    //NSURLProtocol.setProperty(requestBodyData.length, forKey: "Content-Length", inRequest: request)

    var response: NSURLResponse? = nil
    var error: NSError? = nil
    let reply = NSURLConnection.sendSynchronousRequest(request, returningResponse:&response, error:&error)

    let results = NSString(data:reply!, encoding:NSUTF8StringEncoding)
    println("API Response: \(results)")
}

@IBAction func sendButton(sender: AnyObject) {
    sendEmail()
    println(emailText.text)
}
}

当按下按钮时电子邮件会通过，但电子邮件中没有任何内容，它只是空白。是的，文本字段中有文本。你能看出我可能出错的地方吗？

感谢任何帮助，感谢。

Answer 1

您的文字可能不会出现的原因有多种：

- ＆GT;您的故事板与ViewController之间的映射在某种程度上被切断了。尝试重新连接它们。

- ＆GT;您可以尝试并专门使用＆＃34; self＆＃34;

var dataString = self.emailText.text;

- ＆GT;您可以使用NSData提供的以下初始化程序：

NSData(base64String:String, options:NSDataBase64DecodingOptions)

- ＆GT;放置一个调试点或编写一个简单的print语句，显示存在的数据的长度：

let requestBodyData = (dataString as NSString).dataUsingEncoding(NSUTF8StringEncoding)
//if this print says length is 0 then you dont seem to a valid link between the storyboard and the ViewController
print(requestBodyData.length)
request.HTTPBody = requestBodyData

Answer 2

EDITED：试试这样的事情

    let postRequest = NSMutableURLRequest(URL: NSURL(string: "")!)
    let postBody = NSMutableData()

    postRequest.HTTPMethod = "POST"

    // Boundary & Charset
    let boundary = "blahblahblah"
    let charset = "utf-8"

    let contentType = "multipart/form-data; charset=\(charset); boundary=\(boundary)"
    postRequest.addValue(contentType, forHTTPHeaderField: "Content-Type")

    let stringData = NSMutableString()

    stringData.appendFormat("--\(boundary)\r\n")

    let endBound = "\r\n--\(boundary)\r\n"
    let codeInfo = "Content-Disposition: form-data; name=\"code\"\r\n\r\n\(code!)"
    stringData.appendString(codeInfo)
    stringData.appendString(endBound)

    postBody.appendData(stringData.dataUsingEncoding(NSUTF8StringEncoding)!)

    postRequest.HTTPBody = postBody

    let operationQueue = NSOperationQueue()
    NSURLConnection.sendAsynchronousRequest(postRequest, queue: operationQueue) { (response, data, error) -> Void in
        if data != nil {
            let resp = String(data: data!, encoding: NSUTF8StringEncoding)
            print("Response -> \(resp)")


        }
    }

// -----

尝试对代码进行调试，看看“dataString”中是否包含文本。还要确保'requestBodyData'不是nil

如果它的nil或empty可能意味着你的故事板的emailText没有与代码'@IBOutlet'正确连接

// set data
var dataString = emailText.text
let requestBodyData = (dataString as  NSString).dataUsingEncoding(NSUTF8StringEncoding)

或者可以像这样检查

let contentType = "multipart/form-data; charset=utf-8; boundary=\(boundary)"
request.addValue(contentType, forHTTPHeaderField: "Content-Type")

消息是空白的？

2 个答案: