how to disable re-login in iphone - iphone

Question

I have developed an app which is related with signing in to an account and people can also get registered in my app, since those user info will be stored in a SQLite database.
The problem is that, when the user logs out of the account and then re-logs in, the app asks the user to login again. I dont want this to happen, as it should remember the user name and password and should login automatically.
Does anyone know how to get this done?

Answer 1

In your AppDelegate.m file , add the NSUserDefaults method ...
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSUserDefaults *standardUserDefaults = [NSUserDefaults standardUserDefaults];
if ([standardUserDefaults valueForKey:#"dbID"]==nil) {
[standardUserDefaults setObject:#"1" forKey:#"dbID"];
[standardUserDefaults synchronize];
}
}
and also you have sane the username and password save the NSUserDefaults.
and for log out functionality , add the code logout code where you want the logout the applications ...
-(IBAction)Logout :(id)sender {
[[NSUserDefaults standardUserDefaults] setObject:#"" forKey:#"dbID"];
[NSUserDefaults resetStandardUserDefaults];
}
in the login time check the dbID is null then user login with the username and password. if the dbID is not null the login the old username and password.
if u are exit the without logout the applications , then store the dbID is "1" in the NSUserDefaults and redirect the view controller and For save the user name and password in the your logon time...for save
[[NSUserDefaults standardUserDefaults] setValue:#"Your text field value" forKey:#"Username"];
[[NSUserDefaults standardUserDefaults] setValue:#"Your text field value" forKey:#"password"];
read the
NSString * _UserName = [[NSUserDefaults standardUserDefaults] stringForKey:#"Username"];
NSString * _password = [[NSUserDefaults standardUserDefaults] stringForKey:#"password"];
username and password save the NSUserDefaults is indicated the u have store the username and password in NSUserDefaults.
if the you have logout the application by button , the make the NUll username and password save the NSUserDefaults .. like
[[NSUserDefaults standardUserDefaults] setValue:#"" forKey:#"Username"];
[[NSUserDefaults standardUserDefaults] setValue:#"" forKey:#"password"];

Answer 2

Use NSUserDefaults. This one will work fine
NSUserDefaults *rememberDefault = [NSUserDefaults standardUserDefaults];
if ([[rememberDefault valueForKey:#"Autologin"] isEqualToString:#"Autologin_on"]) {
btnAutoLogin.selected =NO;
}else {
btnAutoLogin.selected =YES;
}
In your Button Action Method :
-(IBAction)btnOnOffSwitch:(UIButton *)sender{
if (sender.selected) {
sender.selected = NO;
}else {
sender.selected = YES;
}
}
and when you want to check use this:
NSUserDefaults *rememberDefault = [NSUserDefaults standardUserDefaults];
if([[rememberDefault valueForKey:#"Autologin"] isEqualToString:#"Autologin_on"])
{
write your code here. to push directly to your home screen. this should be checked in your login screen
}

Answer 3

may b this will help you.
for your condition when user successfully login first time at that time make 1 dictionary for storing username , password and user id else make 3 different nsuserdefault object for this 3 types.
and when user comes again in that login screen check that nsuser default value is empty or has some value so if the value is there than it has already logsin and u can directly redirect him to next page .. else display the login page..
here i have write only the logic not source code so u can try it out your self and learn more :)..
hope this will help you.