What is mean by KVC in iOS?

KVC mean Key value coding

It used to store value in key ,after you access value which help of key is called KVC

ex:

step1: create nsuserdefaults

 NSUserDefaults *storeData = [NSUserDefaults standardUserDefaults];

step 2:

set any value for any key 

    [storeData setObject:@"value" forKey:@"key"];

    

step 3:

read value to using same key

    NSString *value = [storeData ObjectForKey:@"key"];

step 4: enjoy coding

Note: once you set value to key it does not change until you reassign value.