Question

Can I read just the key from plist without its value, also if I know the value can I read the key ?

Answer 1

Reading .plist:

NSString *path = [[NSBundle mainBundle] pathForResource:@"myPlist" ofType:@"plist"];    
NSMutableDictionary *myDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:path];

Getting all keys and all values:

NSArray* allmyKeys = [myDictionary  allKeys];
NSArray* allmyValues= [myDictionary  allValues];

Getting all keys for an values object:

NSArray* allmyKeys = [myDictionary  allKeysForObject:myValueObject];