Question

I have a login view controller that uses the php/mysql/POST function to verify if a user is authorized. Once authorized, they enter the application.

My question is, once they are in the application, how do I “grab” their username and use it to append to any data that they upload to my database while they are in my app?

I am assuming I append it to my current NSMutableData string that carries the text blocks that they upload, but how would I “grab” this username to append it?

Assuming I have two view controllers, “login” and “main”, and the content is being uploaded on “main”, how do I pass the username from the “login” view to the “main” view so that I can append it when the user hits the upload button (which resides on the main view)?

EDIT: Where I want this username retrieved is in the following:

-(IBAction)uploadImage:(id)sender  {
NSLog(@"uploadImage");



//and for retrieval





NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSString *authenticatedUsersName = [defaults objectForKey:@"username"];


NSMutableString *postString = [NSMutableString stringWithString:kPostURL]; 



[postString appendString:[NSString stringWithFormat:@"&%@=%@", kText, textField.text]];



[postString setString:[postString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

Answer 1

If you’re not concerned with security of a username, why don’t you store the username in NSUserDefaults upon successful authentication? You can do something like this….

//upon authentication...

NSUserDefault *defaults = [NSUserDefaults standardUserDefaults];
if ([defaults objectForKey:@"username"] == nil) //we haven't saved anything yet
     [defaults setObject:authenticatedUsersName forKey:@"username"];

[defaults synchronize];  //saves the new defaults

//and for retrieval

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSString *authenticatedUsersName = [defaults objectForKey:@"username"];

I think this design gives you more flexibility so you can use the username across all view controllers in your app.

post re-edit

Why can’t you just format the string somewhere in this function? Whats the exact post url format?

    -(IBAction)uploadImage:(id)sender  {
    NSLog(@"uploadImage");

    //and for retrieval     

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    NSString *authenticatedUsersName = [defaults objectForKey:@"username"];

    //MY CHANGES, CAN YOU DO EITHER OF THESE?

    NSMutableString *postString = [NSMutableString stringWithString:[NSString stringWithFormat:@"%@-%@", kPostURL, authenticatedUsersName]; 

    [postString appendString:[NSString stringWithFormat:@"&%@=%@&%@", kText, textField.text, authenticatedUsersName]];

    [postString setString:[postString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

}