Validating emails with firebase for iOS - ios

Question

When submitting a request to create a new user, if the user tries to submit with an invalid email, the app crashes (I.E. without an # sign). Is there a way to check if an email is valid through Firebase or is that something I need to validate app side?
The error I get in the console is:
* Terminating app due to uncaught exception 'InvalidEmail', reason: 'jfkdsla;fjdk is an invalid email address'
NSString *url = [NSString stringWithFormat:#"https://myapp.firebaseio.com/users/%#", displayName.text];
Firebase *dataRef = [[Firebase alloc] initWithUrl:url];
[dataRef observeEventType:FEventTypeValue withBlock:^(FDataSnapshot *snapshot) {
NSLog(#"Ref %#", snapshot.value);
snapshotValue = snapshot.value;
}];
if (snapshotValue == NULL) {
AppDelegate *appDelegate= (AppDelegate *)[[UIApplication sharedApplication] delegate];
[appDelegate.authClient createUserWithEmail:email.text password:password.text andCompletionBlock:^(NSError* error, FAUser*user) {
if (error != nil) {
// Error
NSLog(#"ERROR CODE: %d",error.code);
NSLog(#"ERROR: %#",error);
if (error.code == -9999) {
email.textColor = [UIColor redColor];
}
} else {
NSLog(#"Created %#",user.userId);
Firebase *userRef = [[Firebase alloc] initWithUrl:[NSString stringWithFormat:#"https://myapp.firebaseio.com/users/%#",displayName.text]];
[[userRef childByAppendingPath:#"name"] setValue:fullName.text];
[[userRef childByAppendingPath:#"user_id"] setValue:user.userId];
Firebase *userCredentials = [[Firebase alloc] initWithUrl:[NSString stringWithFormat:#"https://myapp.firebaseio.com/users/%#/credentials",displayName.text]];
[[userCredentials childByAppendingPath:#"email"] setValue:email.text];
[[userCredentials childByAppendingPath:#"password"] setValue:password.text];
AppDelegate *appDelegate= (AppDelegate *)[[UIApplication sharedApplication] delegate];
[appDelegate.authClient loginWithEmail:email.text andPassword:password.text
withCompletionBlock:^(NSError* error, FAUser* user) {
if (error != nil) {
NSLog(#"There was an error logging in to this account: %#",error);
} else {
NSLog(#"logged in");
[self dismissViewControllerAnimated:NO completion:nil];
[appDelegate.window.rootViewController presentViewController:appDelegate.tabBarController animated:YES completion:nil];
}
}];
}
}];
}
else {
displayName.textColor = [UIColor redColor];
}
}

Answer 1

Since an exception is being thrown, throw the "createUserWithEmail" line of code into a "#try{} / #catch{}" block:
#try {
[appDelegate.authClient createUserWithEmail:email.text password:password.text andCompletionBlock:^(NSError* error, FAUser*user) {
...
...
// keep that big huge block part intact
...
...
}
}
#catch (NSException * e) {
NSLog(#"Exception: %#", e);
}
}