Question

I am implementing an application, the first view is the login view. It contains 3 textfields : account name, username and password.

I want to let the application save the login information in order not to let the user write them each time they open the application. And to be deleted when they log out.

How to do that? And how to read/write on a file?

Answer 1

To Save:

    [[NSUserDefaults standardUserDefaults] setValue:AccountTxtField.text forKey:@"Account"];
    [[NSUserDefaults standardUserDefaults] setValue:UserTxtField.text forKey:@"Username"];
    [[NSUserDefaults standardUserDefaults] setValue:passwordTxtField.text forKey:@"password"];
    [[NSUserDefaults standardUserDefaults] synchronize];

To Read:

    NSString * _Account = [[NSUserDefaults standardUserDefaults] stringForKey:@"Account"];
    NSString * _UserName = [[NSUserDefaults standardUserDefaults] stringForKey:@"Username"];
    NSString * _password = [[NSUserDefaults standardUserDefaults] stringForKey:@"password"];

logOut : set all value is null.