NSDictionary is a useful object to store key-pair values just like HashMap in Java.

You can create and iterate a NSDictionary as follow

// Create a NSDictionary
NSArray *keys = [NSArray arrayWithObjects:@"key1", @"key2", @"key3", nil];
NSArray *objs = [NSArray arrayWithObjects:@"obj1", @"obj2", @"obj3", nil];
NSDictionary *dict = [NSDictionary dictionaryWithObjects:objs forKeys:keys];
	
// Iterate it
for (id key in dict) {
	NSLog(@"key: %@   value:%@", key, [dict objectForKey:key]);
}

  Continue reading Objective-C – NSDictionary Example →