Verification code always invalid Swift Parse - ios

Question

Im using SMS verification to verify users. My problem is that when I enter a code to verify I get invalid code. I can't for the life of me figure out why.
Calling cloud code function:
#IBAction func verifyCodeButtonTapped(sender: AnyObject) {
var verificationCode: String = verificationCodeTextField.text!
let textFieldText = verificationCodeTextField.text ?? ""
if verificationCode.utf16.count < 4 || verificationCode.utf16.count > 4 {
displayAlert("Error", message: "You must entert the 4 digit verification code sent yo your phone")
} else {
let params = ["verificationCode" : textFieldText]
PFCloud.callFunctionInBackground("verifyPhoneNumber", withParameters: params, block: { (object: AnyObject?, error) -> Void in
if error == nil {
self.performSegueWithIdentifier("showVerifyCodeView", sender: self)
} else {
self.displayAlert("Sorry", message: "We couldnt verify you. Please check that you enterd the correct 4 digit code sent to your phone")
}
})
}
}
Cloud code to verify code:
Parse.Cloud.define("verifyPhoneNumber", function(request, response) {
var user = Parse.User.current();
var verificationCode = user.get("phoneVerificationCode");
if (verificationCode == request.params.phoneVerificationCode) {
user.set("phoneNumber", request.params.phoneNumber);
user.save();
response.success("Success");
} else {
response.error("Invalid verification code.");
}
});

Answer 1

Your parameter names are mismatched between the iOS and JS code.
verificationCode vs phoneVerificationCode
Change
let params = ["verificationCode" : textFieldText]
To use the same parameter name:
let params = ["phoneVerificationCode" : textFieldText]
EDIT
Other issues I see with the code:
The first two lines of the iOS code create a variable and a constant from the textField's text value. Get rid of the verificationCode variable and just use the textFieldText constant.
I would add some more error states to the Cloud Code before you check if the codes are equivalent. First check if the parameter exists and the expected type and length:
var requestCode = request.params.phoneVerificationCode;
if ((typeof requestCode !== "string") || (requestCode.length !== 4)) {
// The verification code did not come through from the client
}
Then perform the same checks on the value from the user object:
else if ((typeof verificationCode !== "string) || (verificationCode.length !== 4)) {
// There is not a verification code on the Parse User
}
Then you can continue to checking if requestCode and verificationCode are equivalent.