我創建了一個用戶類,其中包含一個Parse PFUser()對象和一個用於error_messages的字符串。Swift解析在註冊時不顯示錯誤信息
在用戶類中是一個註冊函數,它將使用PFUser對象並執行signUpInBackgroundWithBlock()。
在該函數中,它應該設置一個標誌,通知主視圖控制器發生錯誤,如果執行錯誤消息並從PFUser傳回的錯誤消息中設置User對象中的error_message字符串。
但是,發生錯誤時,函數不會執行完畢,例如,如果輸入了不正確的電子郵件格式,例如aaaa.com而不是[email protected],函數將不會返回並設置標誌相反,從PFUser傳遞的錯誤消息僅顯示在控制檯窗口中。
我已經花了幾天的時間試圖在用戶類中設置標誌和錯誤消息,但我無法弄清楚。
下面是類代碼
class User {
var user_db_obj = PFUser()
var error_message = "Please try again later"
//var user_name: String
//var pass_word: String
//Constructor for User object
init(user: String, pass: String){
user_db_obj.username = user
user_db_obj.email = user
user_db_obj.password = pass
}
//This function signs a user up to the database
func signUp() -> Bool {
var error_in_sign_up: Bool = true
user_db_obj.signUpInBackgroundWithBlock {(succeeded: Bool?, error: NSError?) -> Void in
//stop spinner and allow interaction events from user
activityIndicator.stopAnimating()
UIApplication.sharedApplication().endIgnoringInteractionEvents()
if error == nil{
error_in_sign_up = false
//sign up successful
}
else{
let error_string = error!.userInfo["error"] as? String
self.error_message = error_string!
}
}
if error_in_sign_up == true{
return false
}
else{
return true
}
}
這裏是調用從用戶類的註冊功能視圖控制器代碼。
//Action for signup button
@available(iOS 8.0, *)
@IBAction func signup_btn(sender: AnyObject) {
if email_tf.text!.isEmpty || pass_tf.text!.isEmpty {
//if email or password field blank display error message
displayAlert("Error in form", msg: "Please enter a username and password")
}
else{ //perform actual signup/login if email and password supplied
//Display spinner while database interaction occuring and ignore user interactions as well
activityIndicator = UIActivityIndicatorView(frame: CGRectMake(0, 0, 50, 50))
activityIndicator.center = self.view.center
activityIndicator.hidesWhenStopped = true
activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray
view.addSubview(activityIndicator)
activityIndicator.startAnimating()
UIApplication.sharedApplication().beginIgnoringInteractionEvents()
let theUser = User(user: email_tf.text!, pass: pass_tf.text!)
//sign up
if signup_mode == true{
if theUser.signUp() == false{
displayAlert("Failed SignUp", msg: theUser.error_message)
}
}
//login
else{
if theUser.login() == false{
displayAlert("Failed Login", msg: theUser.error_message)
}
}
}
}