1 NSMutableArray *mutArray1 = [[NSMutableArray alloc]init];
2 NSDictionary *dic = [[NSDictionary alloc]initWithObjectsAndKeys:[NSNumber numberWithInt:98],@"chinese", [NSNumber numberWithInt:68],@"math",[NSNumber numberWithInt:108],@"english",[NSNumber numberWithInt:58],@"politics",nil];
3 NSArray *array = [dic allValues];
4 NSLog(@"%@",array);
5 array = [array sortedArrayUsingSelector:@selector(compare:)];
6 NSLog(@"%@",array);
7 // NSArray *array1 = [dic allKeysForObject:[NSNumber numberWithInt:98]];
8 // NSString *str2 = [array1 objectAtIndex:0];
9 // NSLog(@"%@",str2);
10 for (int i = 0; i < array.count; i ++)
11 {
12 NSArray *array2 = [dic allKeysForObject:[array objectAtIndex:i]];//在排好序数组中按照值取键
13 NSString *str2 = [array2 objectAtIndex:0];//在数组中把键取出
14 [mutArray1 addObject:str2];//取出的键加到新的数组中
15 }
16 NSLog(@"mutArray2 = %@",mutArray1);
17 }
