Forgot Password code: Objective C - ios

Question

I'm building an iOS app and I need to provide a forgot password function. I have a db that stores registered users and their details(userArray). I have searched by email inputed so, how do I do a UIAlert that shows the found password??? below is code I tried but my if condition is wrong.
[self.theuser valueForKey:#"password"] is the retrieved password from the database and its a string.
- (IBAction)ForgotPassword:(id)sender {
if ([[self.theuser valueForKey:#"password"] > 0 ]) {
UIAlertView *alert = [[UIAlertView alloc]initWithTitle: #"Success"
message: #"Your Password is:"
delegate: self
cancelButtonTitle:#"Ok"
otherButtonTitles:nil];
[alert show];
}

Answer 1

You need to check that the length of the string is higher than 0, because using this:
if ([self.theuser valueForKey:#"password"])
will always return true if the value is other than nil, meaning if you server code returns that the value of password is "" (two quote marks with no space in between) then the app will recognize that the value is not nil and display an alert with no text in it
So the final code should look something like this:
- (IBAction)ForgotPassword:(id)sender {
NSString *retrievedPassword = [self.theuser valueForKey:#"password"];
if ( retrievedPassword.length > 0) {
NSString *message = [NSString stringWithFormat:#"Your password is: %#", retrievedPassword];
UIAlertView *alert = [[UIAlertView alloc]initWithTitle: #"Success"
message: message
delegate: self
cancelButtonTitle:#"Ok"
otherButtonTitles:nil];
[alert show];
}
}

Answer 2

Change:
#"Your Password is:"
to:
[NSString stringWithFormat:#"Your Password is: %#", [self.theuser valueForKey:#"password"]]
You can also change this:
if ([[self.theuser valueForKey:#"password"] > 0 ]) {
to this:
if ([self.theuser valueForKey:#"password"]) {
If it didn't exist, it would count as "false". Any other value is "true".