NSUserDefaults storing persistent data in iOS App - Xcode.

We can use Sqlite, p-List, and NSFile for storing User Data.

But they are little complex, if we just want store small data we can use NSUserDefaults.
Note: The values are removed on app deletion and the values are not affected when an application is updated.

Eg://Set the values

[[NSUserDefaults standardUserDefaults] setBool:NO      forKey:@"myBoolKey"];

[[NSUserDefaults standardUserDefaults] setObject:@"myString" forKey:@"myStringKey"];

[[NSUserDefaults standardUserDefaults] setInteger:1      forKey:@"myIntegerKey"]; 

//Fetch the values

[[NSUserDefaults standardUserDefaults] boolForKey:@"myBoolKey"];

 [[NSUserDefaults standardUserDefaults]   valueForKey:@"myStringKey"];

[[NSUserDefaults standardUserDefaults] integerForKey:@"myIntegerKey"];

To remove/reset all the values:

NSString *appDomain = [[NSBundle mainBundle] bundleIdentifier];
[[NSUserDefaults standardUserDefaults] removePersistentDomainForName:appDomain];

To remove one the values:

 [[NSUserDefaults standardUserDefaults] removeObjectForKey:@"myKey"];