How to condition segues using CloudKit query? - ios

Question

I created a login page backed up by CloudKit.
I want to know how to create a conditioned segue if the login has a certain value, and then direct the user to a View Controller based on that value
In details, I have three Segues I want to connect:
sign in id segue:LoginSuccessSegue
staff tab bar id segue:idStaffTabBar
student tab bar id segue:idStudentTabBar
First Segue
LoginSuccessSegue:
the sign in view controller has a show segue id LoginSuccessSegue the connects to staff tab bar controller and student tab bar controller.
Second Segue
idStaffTabBar:
After queryProfileType() is executed, it will look for the profile type in a list to check if the user profile is a teacher value or something else. Then if that is true "LoginSuccessSegue" will automatically take the user to staff tab bar controller, "StaffBookedVC.self" by usingits segueidStaffTabBar `
Third Segue
idStudentTabBar:
if the user is not a teacher then after pressing the sign in button redirect to student tab bar controller, "stdBookingVC.self" by using idStudentTabBar or
How can I achieve an automatic conditional sign in in multiple views suing segues and cloud kit query?
This is the code for the sign-in button:
#IBAction func btnSignInTapped(sender: UIButton)
{
let userEmailAddress = userEmailAddressTextField.text
let userPassword = userPasswordTextField.text
if(userEmailAddress!.isEmpty || userPassword!.isEmpty)
{
notifyUser("Empty fields", message: "all fields are required")
}
print("fetching is in progress")
queryProfileType()
print("\nfetching had stopped")
}//end of signInbtn
func queryProfileType()
{
queryCredentials()
print("\nProfile Query starting")
//execute query
let organizers = ["Teacher || Youtuber || Instagrammer || "]
let predicate = NSPredicate(format: "ProfileType = '\(organizers)' ")
print("\nThis is the predicate\n\(predicate)")
let query = CKQuery(recordType: "RegisteredAccounts", predicate: predicate)
publicDatabase!.performQuery(query, inZoneWithID: nil) { results, error in
if (error != nil)
{
print(error)
}else
{
if (results! == organizers)
{
self.performSegueWithIdentifier("idStaffTabBar", sender: StaffBookedVC.self)
}else{
self.performSegueWithIdentifier("idStudentTabBar", sender: stdBookingVC.self)
}
print("\(results)\nthese are the printed results")
}
}
let firstFetch = CKFetchRecordsOperation()
let secondFetch = CKFetchRecordsOperation()
secondFetch.addDependency(firstFetch)
let queue = NSOperationQueue()
queue.addOperations([firstFetch, secondFetch], waitUntilFinished: false)
}
here is a picture of the storyboard segues Storyboard
if your answer will contain these methods, please show me some examples:
shouldPerformSegueWithIdentifier and prepareForSegue
this did not work from me either
self.presentViewController(SignInNavigationVCTabBars, animated: true,
{ results, error in
if (results! == organizers)
{
self.performSegueWithIdentifier("idStaffTabBar", sender: StaffUITABbarVC.self)
}else{
self.performSegueWithIdentifier("idStudentTabBar", sender: StdUITABbarVC.self)
}
}
`

Answer 1

You need to do something like presentModalViewController to show the navigationController first, within your queryProfileType method. And then do some smart logic to determine which route to go, after the navigationController is loaded. So a custom UINavigationController is needed.
Or an easier way:
Move your loginViewController into the navigation controller stack, and then link the two existing segues, i.e. idStaffTabBar and idStudentTabBar to it. That will solve the problem.

Answer 2

Here is the answer
I did not expect valueforkey would have it all
what can I see? never stop trying
//log in function
func queryCredentials()
{
print("*********\nQueryCredentials starting")
// System indicator
let spinningActivity = MBProgressHUD.showHUDAddedTo(self.view, animated: true)
spinningActivity.labelText = "Signing in"
spinningActivity.detailsLabelText = "Please wait"
// querying predicate in cloud kit to check via email and password property
let predicate = NSPredicate(format: "Email = %#", userEmailAddressTextField.text!)
let query = CKQuery(recordType: "RegisteredAccounts", predicate: predicate)
publicDatabase?.performQuery(query, inZoneWithID: nil,
completionHandler: ({results, error in
if (error != nil)
{
dispatch_async(dispatch_get_main_queue())
{
// if the user is not signed, display this error
self.notifyUser("Cloud Access Error",
message: "to fix this error Sign in you icloud \n go to settings\nthen sign in icloud account\n error code:\(error!.localizedDescription)")
}
}else
{
if (results!.count > 0)
{
// the results after success case of the query
let record = results![0] as! CKRecord
// read from the result to navigate via profiletype attribute
let proftype = record.valueForKey("ProfileType") as! String
switch proftype
{
case("Teacher"):
self.staffView()
break;
case("Manager"):
self.staffView()
break;
case("Student"):
// stdView() is a student coded segue as a function to navigate to student view
self.stdView()
break;
case("Worker"):
self.stdView()
break;
default:
break;
}
self.currentRecord = record
dispatch_async(dispatch_get_main_queue())
{
// if credentials are correct, display you are logged in
self.userPasswordTextField!.text =
record.objectForKey("Password") as! String
self.notifyUser("Welcome", message: "You are loogedin")
}
}else
{
dispatch_async(dispatch_get_main_queue())
{
self.notifyUser("No Match Found",
message: "No record matching")
}
}
}
}))
// hiding indicator
spinningActivity.hide(true)
}