问题
Im trying to update a variable inside a class "var CurrentStatus:status! " status is an enum. I have a firebase function that will update the variable. the variable get update inside the firebase function but it will not update the variable outside of the firebase function
class signUpClass:UIViewController {
// check to see if form is empty
let ihelpController = UIViewController()
var CurrentStatus:status!
func signUp(var formArray: [String:String]) -> status{
var formStatus:status = ihelpController.checkIfFormIsEmpty(formArray)
if (formStatus == status.success){
//form is ok to process
// check DOB
//TODO: create date calculation function
let DateOfBirth:Int = 18
if DateOfBirth < 18 {
//user is not 18 they can not register
alertError("oops", message: "You must be 18 to register", comfirm: "Ok")
} else {
//Proceed with registration
let firebaseController = Firebase()
var email = "asdf@afd.com"
var password = "1234"
firebaseController.refPath("users").createUser(email, password: password, withValueCompletionBlock: {error, result in
if error != nil {
print("registration Error")
self.alertError("oops", message: "That email is registered already", comfirm: "OK")
} else {
let vc =
print("user can register")
firebaseController.firebaseRefUrl().authUser(email, password: password, withCompletionBlock:{
error, authdata in
if error != nil {
print("login Error")
}else{
let userId = firebaseController.firebaseRefUrl().authData.uid
formArray["userId"] = userId
firebaseController.refPath("users/\(userId)").updateChildValues(formArray)
print("user is register and can proceed to dashBoard")
//Proceed to dashboard
self.CurrentStatus = status.success
}
})
}
})
}
}
return CurrentStatus
}
回答1:
Agreed with Jay's comment. You cannot return the status like that because Firebases works asynchronously... what I would do, is add a closure parameter that executions on completion like so:
class signUpClass:UIViewController {
// check to see if form is empty
let ihelpController = UIViewController()
var CurrentStatus:status!
func signUp(var formArray: [String:String], complete:(CurrentStatus)->()){
var formStatus:status = ihelpController.checkIfFormIsEmpty(formArray)
if (formStatus == status.success){
//form is ok to process
// check DOB
//TODO: create date calculation function
let DateOfBirth:Int = 18
if DateOfBirth < 18 {
//user is not 18 they can not register
alertError("oops", message: "You must be 18 to register", comfirm: "Ok")
} else {
//Proceed with registration
let firebaseController = Firebase()
var email = "asdf@afd.com"
var password = "1234"
firebaseController.refPath("users").createUser(email, password: password, withValueCompletionBlock: {error, result in
if error != nil {
print("registration Error")
self.alertError("oops", message: "That email is registered already", comfirm: "OK")
} else {
let vc =
print("user can register")
firebaseController.firebaseRefUrl().authUser(email, password: password, withCompletionBlock:{
error, authdata in
if error != nil {
print("login Error")
}else{
let userId = firebaseController.firebaseRefUrl().authData.uid
formArray["userId"] = userId
firebaseController.refPath("users/\(userId)").updateChildValues(formArray)
print("user is register and can proceed to dashBoard")
//Send status to callback to handle
complete(status.success)
}
})
}
})
}
}
}
来源：https://stackoverflow.com/questions/37244952/how-can-i-access-firebase-variable-outside-firebase-function