NSString&NSArray&NSDictionary定义及使用

NSString *greeting=[[NSString alloc] initWithFormat:@"test %@",nameString];

    self.lable.text=greeting;

    NSString *objs[3]={@"one",@"two",@"three"};

    NSArray *dicObj=[NSArray arrayWithObjects:objs count:3];

    NSArray *dicObj2=[[NSArray alloc] initWithObjects:@"one",@"two",@"three", nil];

    NSMutableArray *dicObj3=[NSMutableArray arrayWithCapacity:17];

    for(NSString *obj in dicObj2)

    {

        //if([obj isEqual:@"onew"])

        {

            NSLog(@"good!");

        }

    }

    [dicObj3 enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {

        if([obj isEqual:@"test"])

        {

            NSLog(@"test here");

            *stop=YES;

        }

    }];

    NSArray *test=[NSArray arrayWithObjects:@"01",@"02", nil];

    NSDictionary *dics=[NSDictionary dictionaryWithObject:test forKey:test];

    NSArray *dkeys=[dics allKeys];

    int count=[dkeys count];

    for(int i=0;i<count;i++)

    {

        id key=[dkeys objectAtIndex:i];

        id value=[dics objectForKey:key];

        NSLog(@"key=%@ value=%@",key,value);

    }