众所周知,异步发布请求更好,因为用户不会在加载漫长过程时感觉应用“崩溃”。如何将同步发布请求转换为异步发布请求?
但是,我不确定从哪里开始将同步发布请求转换为Swift代码的异步发布请求。
我现在这样的代码:
所有的func checkLogin() {
let username:NSString = txtUsername.text! as NSString
let password:NSString = txtPassword.text! as NSString
do {
let post:NSString = "username=\(username)&password=\(password)" as NSString
NSLog("PostData: %@",post);
let url:URL = URL(string:"https://example.com/login.php")!
let postData:Data = post.data(using: String.Encoding.ascii.rawValue)!
let postLength:NSString = String(postData.count) as NSString
let request:NSMutableURLRequest = NSMutableURLRequest(url: url)
request.httpMethod = "POST"
request.httpBody = postData
request.setValue(postLength as String, forHTTPHeaderField: "Content-Length")
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.setValue("application/json", forHTTPHeaderField: "Accept")
var reponseError: NSError?
var response: URLResponse?
var urlData: Data?
do {
urlData = try NSURLConnection.sendSynchronousRequest(request as URLRequest, returning:&response)
} catch let error as NSError {
reponseError = error
urlData = nil
}
if (urlData != nil) {
let res = response as! HTTPURLResponse!;
NSLog("Response code: %ld", res?.statusCode);
if ((res?.statusCode)! >= 200 && (res?.statusCode)! < 300) {
let responseData:NSString = NSString(data:urlData!, encoding:String.Encoding.utf8.rawValue)!
NSLog("Response ==> %@", responseData);
let jsonData:NSDictionary = try JSONSerialization.jsonObject(with: urlData!, options:JSONSerialization.ReadingOptions.mutableContainers) as! NSDictionary
let success:NSInteger = jsonData.value(forKey: "success") as! NSInteger
NSLog("Success: %ld", success);
if(success == 1)
{
// do something, code removed
} else {
var error_msg:NSString
if jsonData["error_message"] as? NSString != nil {
error_msg = jsonData["error_message"] as! NSString
} else {
error_msg = "Unknown Error"
}
// show alert
}
}
}
}
}
谢谢您的回答!我不确定如何提交我的帖子值,以及如何解析收到的JSON? – Panda
@Panda你的请求也会一样,你也完成了JSON解析。为了在Swift 3中使用,您可能需要做的改变可能很少。您可以轻松地做到这一点。首先深入这一点。快乐编码..! –