How to use of NSSet

1. NSSet define

  NSSet *setSharp;

2. Set config

setSharp = [NSSet setWithObjects:[NSNumber numberWithInt:2], [NSNumber numberWithInt:4], [NSNumber numberWithInt:7], [NSNumber numberWithInt:9], [NSNumber numberWithInt:11], [NSNumber numberWithInt:14], [NSNumber numberWithInt:16], [NSNumber numberWithInt:19], [NSNumber numberWithInt:21], [NSNumber numberWithInt:23], nil];

3. set use

if ([setSharp containsObject:[NSNumber numberWithInt:iclavier]]) 

{

    imgView.image = touchSharp;

}

very fast

hash calculate