@IBOutlet var txtusername: UITextField!
@IBOutlet var txtpassword: UITextField!
@IBAction func SigninTapped(sender: UIButton)
{
var username:NSString = txtusername.text
var password:NSString = txtpassword.text
if (self.txtusername.text.isEmpty)
{
(UIAlertView(title: "Fields cant be empty", message: "Please Enter email id and password",
delegate: nil, cancelButtonTitle: "OK").show())
return
}
else if (range==nil)
{
(UIAlertView(title: "Invalid Email Id", message: "Please enter correct email id", delegate: nil, cancelButtonTitle: "OK").show())
return
}
else if (txtpassword.text == "" )
{
var alertView:UIAlertView = UIAlertView()
alertView.title = "Failed!"
alertView.message = "Please enter Password"
alertView.delegate = self
alertView.addButtonWithTitle("OK")
alertView.show()
return
}
else
{
var url:NSURL = NSURL(string:"http://192.168.0.31:8097/api/user/GetValidateUser" + "/" + username + "/" + txtpassword.text)!
var err:NSError?
var request:NSMutableURLRequest = NSMutableURLRequest(URL: url)
request.HTTPMethod = "GET"
request.addValue("application/json", forHTTPHeaderField: "Content-Type");
request.addValue("application/json", forHTTPHeaderField: "Accept");
var reponseError: NSError?
var response: NSURLResponse?
var urlData: NSData? = NSURLConnection.sendSynchronousRequest(request, returningResponse:&response, error:&reponseError)
if ( urlData != nil )
{
let res = response as NSHTTPURLResponse!;
var responseData:NSString = NSString(data:urlData!, encoding:NSUTF8StringEncoding)!
NSLog("Response code: %ld", res.statusCode);
//var message :String = "Valid user"
if (res.statusCode == 200)
{
if(responseData != "\"Valid user\"")
{
var alertView:UIAlertView = UIAlertView()
alertView.title = "Failed"
alertView.message = responseData
alertView.delegate = self
alertView.addButtonWithTitle("OK")
alertView.show()
return;
}
//Get the address book reference
//GabbersController().GetAddressBook()
// var alertView:UIAlertView = UIAlertView()
// alertView.title = "Sign in Message"
// alertView.message = responseData
// alertView.delegate = self
// alertView.addButtonWithTitle("OK")
// alertView.show()
}
else {
var alertView:UIAlertView = UIAlertView()
alertView.title = "Failed"
alertView.message = responseData;
if let error = reponseError {
alertView.message = (error.localizedDescription)
}
alertView.delegate = self
alertView.addButtonWithTitle("OK")
alertView.show()
}
}
else {
var alertView:UIAlertView = UIAlertView()
alertView.title = "Failed"
alertView.message = "Connection failure";
if let error = reponseError {
alertView.message = (error.localizedDescription)
}
alertView.delegate = self
alertView.addButtonWithTitle("OK")
alertView.show()
}
//self.performSegueWithIdentifier:@"Goto__Gabbers" sender:self;
}
}
对于上面的代码,我遇到了那个突然的错误,因为我认为我可能错过了引用导出,当我运行应用程序时,删除了现有的并在我的 Storyboard中重新创建了同样的错误,没有得到我在这里真正错过的东西。它在第一次执行得很好但更进一步它不是,抛出致命的意外 nil 错误任何人都可以告诉我实际上在这里错过了什么。
这正是我得到的错误:
fatal error: unexpectedly found nil while unwrapping an Optional value
贴出我的完整代码
最佳答案
根据 Swift1.2,您可以执行以下操作。
@IBOutlet var txtusername: UITextField!
@IBOutlet var txtpassword: UITextField!
@IBAction func SigninTapped(sender: UIButton)
{
if let userName = txtusername.text as? String, let password = txtpassword.text as? String {
var url:NSURL = NSURL(string:"http://192.168.0.31:8097/api/user/GetValidateUser" + "/" + userName + "/" + password)!
var err:NSError?
}
}
关于ios - 我错过了什么??解包时发现 fatal error 意外 nil,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30119760/