Question

We developed the iphone app which will be used by employees of the diff. organizations (actually we have not made it enterprise app , instead we are going to put this app on app store for the charge) , So whats we want is whenever the person will install the app, and the app will open first time , one pop up will come over there asking for the enter URL (which will be the URL points to the server of that persons organization) , So going through code logic , what i want is when we will come to the login page in the view did load i want to check whether the URL is already stored in the app or not, if its not stored then i will give that pop up asking for enter URL, and if its stored then simply i will allow him to enter the login details.

My problem is how should i store that URL and where should i store that URL and How should i check whether that is already stored or not. I tried to store that URL with… Where the urlfield.text is the URL i am going to store.

NSError *error;
    // For error information

    // Create file manager
    fileMgr = [NSFileManager defaultManager];

    // Point to Document directory
    documentsDirectory = [NSHomeDirectory() 
                          stringByAppendingPathComponent:@"Documents"];
    fileExists = [[NSFileManager defaultManager] fileExistsAtPath:filePath];
    // File we want to create in the documents directory 
    // Result is: /Documents/file1.txt
    filePath = [documentsDirectory 
                stringByAppendingPathComponent:@"file1.txt"];
    str=urlField.text;
    // Write the file
    [str writeToFile:filePath atomically:YES 
            encoding:NSUTF8StringEncoding error:&error];

    // Show contents of Documents directory
    NSLog(@"Documents directory: %@",
          [fileMgr contentsOfDirectoryAtPath:documentsDirectory error:&error]);

and i am checking whether its there or not using..

 // fileExists is a BOOL variable
          fileExists = [[NSFileManager defaultManager] fileExistsAtPath:filePath]; 
         NSLog(@"Boolean value:=%d",fileExists);
        if ( fileExists  == 0 ) 
        {
           .......
          ........
        }

but each time i runs the app it returns the ‘0’ (means the BOOL variable fileExists) .
please some one will tell me the way to accomplish my task, I am end up with trying all the sides with this logic.

Answer 1

i use the NSUserDefaults for this.

first upon for checking that whether the user is opening the app first time i check the value for the first object of NSUserDefault like

 //defaults is a object of NSUserDefault 
NSString *URLEntered =[defaults objectForKey:@"URLISENTERED"];
if (!URLEntered)  {

        [defaults setValue:@"0" forKey:@"URLISENTERED"];
    }

the URLEntered returns null at first time, so i set the value 0 for Key URLISENTERED

and i allowed users to enter the URL of there organizations server,
within that i set the valu for key URLISENTERED as a 1 , like

[defaults setValue:@"1" forKey:@"URLISENTERED"];

and at the same time i take one more object of NSUserDefault to store the URL of the server and stored that like

// defaultURL is the object of NSUserDefault, and main URL is the URL of server user entered

[defaultURL setValue:mainURL forKey:@"mainURL"];

so next when the user again logins to the app the value of

[defaults objectForKey:@"URLISENTERED"]

is 1 as we set and that time i navigated user to login screen directly , and have fetched the value of mainURL using

mainURL=[defaultURL objectForKey:@"mainURL"];

and used this URL for further use.