How to save password in UserDefault using the NSUserDefault? - iphone

Question

I want to save password when user select remember me checkbox. I have code like this:is this correct?
In Appdelegate.m
#property(strong,nonatomic)NSString *savedno;
in .m file
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
self.viewController = [[[ViewController alloc] initWithNibName:#"ViewController" bundle:nil] autorelease];
self.navcontrol =[[UINavigationController alloc]initWithRootViewController:self.viewController ];
self.window.rootViewController = self.navcontrol;
[self.window makeKeyAndVisible];
self.savedno=[[NSUserDefaults standardUserDefaults]objectForKey:#"pass"];
if(savedno==nil)
{
NSDictionary *saveDict=[NSDictionary dictionaryWithObject:savedno forKey:#"pass"];
[[NSUserDefaults standardUserDefaults]registerDefaults:saveDict];
}
return YES;
}
- (void)applicationWillTerminate:(UIApplication *)application
{
/*
Called when the application is about to terminate.
Save data if appropriate.
See also applicationDidEnterBackground:.
*/
NSUserDefaults *userdefault=[NSUserDefaults standardUserDefaults];
[userdefault setObject:savedno forKey:#"pass"];
}
//ViewDelegate.m file
//event of checkbox
-(IBAction)check:(id)sender
{
if (checkboxSelected == 0)
{
[checkboxButton setSelected:YES];
[checkboxButton setImage:[UIImage imageNamed:#"checkbox-checked.png"]forState:UIControlStateNormal];
// userdefault=[NSUserDefaults standardUserDefaults];
// [userdefault setObject:user.text forKey:#"user"];
// [userdefault setObject:pass.text forKey:#"pass"];
self.callno=pass.text;
pass.text=self.callno;
AppDelegate *appdelegate=[[UIApplication sharedApplication]delegate];
appdelegate.savedno=self.callno;
NSLog(#"Data saved");
checkboxSelected = 1;
}
else
{
[checkboxButton setSelected:NO];
[checkboxButton setImage:[UIImage imageNamed:#"checkbox.png"]forState:UIControlStateNormal];
user.text=#"";
pass.text=#"";
checkboxSelected = 0;
}
}
- (void)viewDidLoad
{
user.clearButtonMode=UITextFieldViewModeWhileEditing;
AppDelegate *appdel=[[UIApplication sharedApplication]delegate];
if([user.text isEqualToString:#"bhoomi"])
{
pass.text=appdel.savedno;
}
[super viewDidLoad];
checkboxSelected = 0;
// Do any additional setup after loading the view, typically from a nib.
}
`

Answer 1

Don't. NSUserDefaults isn't the place for confidential information like passwords. Instead, use the KeyChain.

Answer 2

You should use the keychain to store information like passwords.
Have a look at SFHFKeychainUtils, it will allow to easily use the keychain in your app. It provides two methods: storeUserName:andPassword: and getPasswordForUsername that will make it a snap, and secure!

Answer 3

To save to user defaults do the following
[[NSUserDefaults standardUserDefaults] setValue:#"YourPassword" forKey:#"passowrd"];
//then call
[[NSUserDefaults standardUserDefaults] synchronize];
To get it back
NSString *password = [[NSUserDefaults standardUserDefaults] valueForKey:#"password"];

Answer 4

after setting value to NSUserDefaults you have to synchronize once to get it saved. Use following statement to do so.
[[NSUserDefaults standardUserDefaults] synchronize];
Hope this helps.
EDIT:
It is wise to store credentials into keychain rather than NSUserDefaults.
Use this KeyChain Helper class for the same

Answer 5

use this code...
NSUserDefault *userDefault = [NSUserDefaults standardUserDefaults];
[userDefault setValue:pass_str forKey:#"pass"];
[userDefault synchronize];
may this will help you...