OC -基础（六） 学习中。。。

        NSDictionary * dict = @{@"1":@"one",@"2":@"two",@"3":@"three"};        NSLog(@"dict = %@",dict);        NSDictionary *dict1 =[[NSDictionary alloc] initWithObjectsAndKeys:@"one",@"1",@"two",@"2", nil];        NSLog(@"dict1 = %@", dict1);        NSDictionary *dict2 = [NSDictionary dictionaryWithObject:@"four" forKey:@"4"];        NSLog(@"dict2 = %@", dict2);        NSEnumerator * keyenum = [dict keyEnumerator];        id obj = nil;        while (obj = [keyenum nextObject]) {            NSLog(@"key = %@, value =%@", obj, [dict objectForKey:obj]);        }        NSMutableDictionary *dict3 = [NSMutableDictionary dictionaryWithDictionary:dict];        NSLog(@"dict3 = %@",dict3);        NSArray * array = [dict3 allKeys];        NSLog(@"array = %@",array);        [dict3 addEntriesFromDictionary:dict2];        NSLog(@"dict3 = %@",dict3);