iOS swift 3.0 Json解析和警报问题
我正在做登录表单。我是iOS开发的新手 成功登录后,我想在json解析完成后显示一个警报。我在iOS swift 3.0 Json解析和警报问题,swift,Swift,我正在做登录表单。我是iOS开发的新手 成功登录后,我想在json解析完成后显示一个警报。我在do while块中解析了Ngoid。现在我想将值“Ngoid”传递给下一个视图控制器,以便可以使用它获取进一步的数据 主要问题:这是我编写的代码,如果只在主线程上编写警报,就会出现错误 因为我希望“Ngoid”值在那里进一步使用,所以我应该如何编写它,以及执行代码的正确方式是什么 以下是我编写的代码: @IBAction func loginbutton(_ sender: Any) { le
do while
块中解析了Ngoid
。现在我想将值“Ngoid”传递给下一个视图控制器,以便可以使用它获取进一步的数据
主要问题:这是我编写的代码,如果只在主线程上编写警报,就会出现错误
因为我希望“Ngoid”值在那里进一步使用,所以我应该如何编写它,以及执行代码的正确方式是什么
以下是我编写的代码:
@IBAction func loginbutton(_ sender: Any) {
let myUrl = NSURL(string: "http://www.shreetechnosolution.com/funded/ngo_login.php")
let request = NSMutableURLRequest(url:myUrl! as URL)
request.httpMethod = "POST"// Compose a query string
let postString = "uname=\(textfieldusername.text!)&password=\(textfieldpassword.text!)";
request.httpBody = postString.data(using: String.Encoding.utf8)
let task = URLSession.shared.dataTask(with: request as URLRequest){ data , response , error in
if error != nil
{
//let alert = UIAlertView()
let alert = UIAlertController(title: "Alert Box !", message: "Login Failed", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
return
}
// You can print out response object
print("*****response = \(String(describing: response))")
let responseString = NSString(data: data! , encoding: String.Encoding.utf8.rawValue )
if ((responseString?.contains("")) == nil) {
print("incorrect - try again")
let alert = UIAlertController(title: "Try Again", message: "Username or Password Incorrect", preferredStyle: .alert)
let yesAction = UIAlertAction(title: "Nochmalversuchen", style: .default) { (action) -> Void in
}
// Add Actions
alert.addAction(yesAction)
// Present Alert Controller
self.present(alert, animated: true, completion: nil)
}
else {
print("correct good")
}
print("*****response data = \(responseString!)")
do {
//create json object from data
if let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary {
if let email = json["UserName"] as? String,
let password1 = json["passowrd"] as? String {
print ("Found User id: called \(email)")
}
let msg = (json.value(forKey: "message") as! NSString!) as String
let id = (json.value(forKey: "NgoId") as! NSString!) as String
// let alert : UIAlertView = UIAlertView(title: "Alert box!", message: "\(msg!).",delegate: nil, cancelButtonTitle: "OK")
// alert.show()
self.alert = UIAlertController(title: "Alert Box!", message: "\(msg)", preferredStyle: .alert)
print("the alert\(self.alert)")
self.action = UIAlertAction(title: "OK", style: .default) { (action) -> Void in
let viewControllerYouWantToPresent = self.storyboard?.instantiateViewController(withIdentifier: "pass1") as! ViewControllerngodetails
viewControllerYouWantToPresent.temp1 = self.id
self.present(viewControllerYouWantToPresent, animated: true, completion: nil)
}
self.alert.addAction(self.action)
self.present(self.alert, animated: true, completion: nil)
}
}catch let error {
print(error)
}
}
task.resume()
}
专业提示:
所有与UI相关的任务都需要在主线程中完成。在这里,您将在后台线程中执行的闭包中显示警报,这就是问题所在。您需要调用主队列并在该块中显示警报
编辑:
只要把你的警报代码放在这里-
斯威夫特3-
异步获取主队列
DispatchQueue.main.async {
//Code Here
}
DispatchQueue.main.sync {
//Code Here
}
同步获取主队列
DispatchQueue.main.async {
//Code Here
}
DispatchQueue.main.sync {
//Code Here
}
专业提示:
所有与UI相关的任务都需要在主线程中完成。在这里,您将在后台线程中执行的闭包中显示警报,这就是问题所在。您需要调用主队列并在该块中显示警报
编辑:
只要把你的警报代码放在这里-
斯威夫特3-
异步获取主队列
DispatchQueue.main.async {
//Code Here
}
DispatchQueue.main.sync {
//Code Here
}
同步获取主队列
DispatchQueue.main.async {
//Code Here
}
DispatchQueue.main.sync {
//Code Here
}
每个UI更新都必须在主线程上:
@IBAction func loginbutton(_ sender: Any) {
let myUrl = NSURL(string: "http://www.shreetechnosolution.com/funded/ngo_login.php")
let request = NSMutableURLRequest(url:myUrl! as URL)
request.httpMethod = "POST"// Compose a query string
let postString = "uname=\(textfieldusername.text!)&password=\(textfieldpassword.text!)";
request.httpBody = postString.data(using: String.Encoding.utf8)
let task = URLSession.shared.dataTask(with: request as URLRequest){ data , response , error in
if error != nil
{
DispatchQueue.main.async {
let alert = UIAlertController(title: "Alert Box !", message: "Login Failed", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
// Present Alert Controller
self.present(alert, animated: true, completion: nil)
}
return
}
// You can print out response object
print("*****response = \(String(describing: response))")
let responseString = NSString(data: data! , encoding: String.Encoding.utf8.rawValue )
if ((responseString?.contains("")) == nil) {
print("incorrect - try again")
DispatchQueue.main.async {
let alert = UIAlertController(title: "Try Again", message: "Username or Password Incorrect", preferredStyle: .alert)
let yesAction = UIAlertAction(title: "Nochmalversuchen", style: .default) { (action) -> Void in }
// Add Actions
alert.addAction(yesAction)
// Present Alert Controller
self.present(alert, animated: true, completion: nil)
}
}
else {
print("correct good")
}
print("*****response data = \(responseString!)"
do {
//create json object from data
if let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary {
if let email = json["UserName"] as? String,
let password1 = json["passowrd"] as? String {
print ("Found User id: called \(email)")
}
let msg = (json.value(forKey: "message") as! NSString!) as String
let id = (json.value(forKey: "NgoId") as! NSString!) as String
DispatchQueue.main.async {
self.alert = UIAlertController(title: "Alert Box!", message: "\(msg)", preferredStyle: .alert)
print("the alert\(self.alert)")
self.action = UIAlertAction(title: "OK", style: .default) { (action) -> Void in
let viewControllerYouWantToPresent = self.storyboard?.instantiateViewController(withIdentifier: "pass1") as! ViewControllerngodetails
viewControllerYouWantToPresent.temp1 = self.id
self.present(viewControllerYouWantToPresent, animated: true, completion: nil)
}
self.alert.addAction(self.action)
self.present(self.alert, animated: true, completion: nil)
}
}
}catch let error {
print(error)
}
}
task.resume()
}
每个UI更新都必须在主线程上:
@IBAction func loginbutton(_ sender: Any) {
let myUrl = NSURL(string: "http://www.shreetechnosolution.com/funded/ngo_login.php")
let request = NSMutableURLRequest(url:myUrl! as URL)
request.httpMethod = "POST"// Compose a query string
let postString = "uname=\(textfieldusername.text!)&password=\(textfieldpassword.text!)";
request.httpBody = postString.data(using: String.Encoding.utf8)
let task = URLSession.shared.dataTask(with: request as URLRequest){ data , response , error in
if error != nil
{
DispatchQueue.main.async {
let alert = UIAlertController(title: "Alert Box !", message: "Login Failed", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
// Present Alert Controller
self.present(alert, animated: true, completion: nil)
}
return
}
// You can print out response object
print("*****response = \(String(describing: response))")
let responseString = NSString(data: data! , encoding: String.Encoding.utf8.rawValue )
if ((responseString?.contains("")) == nil) {
print("incorrect - try again")
DispatchQueue.main.async {
let alert = UIAlertController(title: "Try Again", message: "Username or Password Incorrect", preferredStyle: .alert)
let yesAction = UIAlertAction(title: "Nochmalversuchen", style: .default) { (action) -> Void in }
// Add Actions
alert.addAction(yesAction)
// Present Alert Controller
self.present(alert, animated: true, completion: nil)
}
}
else {
print("correct good")
}
print("*****response data = \(responseString!)"
do {
//create json object from data
if let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary {
if let email = json["UserName"] as? String,
let password1 = json["passowrd"] as? String {
print ("Found User id: called \(email)")
}
let msg = (json.value(forKey: "message") as! NSString!) as String
let id = (json.value(forKey: "NgoId") as! NSString!) as String
DispatchQueue.main.async {
self.alert = UIAlertController(title: "Alert Box!", message: "\(msg)", preferredStyle: .alert)
print("the alert\(self.alert)")
self.action = UIAlertAction(title: "OK", style: .default) { (action) -> Void in
let viewControllerYouWantToPresent = self.storyboard?.instantiateViewController(withIdentifier: "pass1") as! ViewControllerngodetails
viewControllerYouWantToPresent.temp1 = self.id
self.present(viewControllerYouWantToPresent, animated: true, completion: nil)
}
self.alert.addAction(self.action)
self.present(self.alert, animated: true, completion: nil)
}
}
}catch let error {
print(error)
}
}
task.resume()
}
这不是Swift 3.x SYNTAX这不是Swift 3.x SYNTAX请不要将您的机密信息放在此处作为基本URL而不是此,您可以编写。请不要将您的机密信息放在此处作为基本URL而不是此,您可以编写