Objective c 在Objective C中对2D数组进行排序

我一直在用objective c对2D数组进行排序。我有一个2D数组，由两个字符串数组组成

NSArray*totalRatings=[NSArray arrayWithObjects:namesArray，ratingsArray，nil]

我使用以下方法提取了这些值：

for (int i=0; i<2; i++) {
  for (int j=0; j<5; j++) {
     NSString *strings = [[totalRatings objectAtIndex:i] objectAtIndex:j];
     NSLog(@"i=%i, j=%i, = %@ \n",i,j,strings);
  }
}

既然这些都是字符串，如何对它们进行排序？我正在寻找：

Person 1, 12
Person 4, 10
Person 3, 9
Person 2, 5
Person 7, 2

---

如果您能提供任何帮助，我将不胜感激。

您可能希望使用字典来处理这些数据，而不是使用两个不同的数组

你为什么不把每个人的记录放在字典上，而不是现在的记录呢

NSArray *totalRatings = [NSArray arrayWithObjects:
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Person 1", @"name", [NSNumber numberWithInt:12], @"rating", nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Person 2", @"name", [NSNumber numberWithInt:5], @"rating", nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Person 3", @"name", [NSNumber numberWithInt:9], @"rating", nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Person 4", @"name", [NSNumber numberWithInt:10], @"rating", nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Person 7", @"name", [NSNumber numberWithInt:2], @"rating", nil],
                             nil];
    NSArray *sortedArray = [totalRatings sortedArrayUsingDescriptors:[NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"rating" ascending:NO]]];

NSArray *totalRatings = [NSArray arrayWithObjects:
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Person 1", @"name", [NSNumber numberWithInt:12], @"rating", nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Person 2", @"name", [NSNumber numberWithInt:5], @"rating", nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Person 3", @"name", [NSNumber numberWithInt:9], @"rating", nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Person 4", @"name", [NSNumber numberWithInt:10], @"rating", nil],
                             [NSDictionary dictionaryWithObjectsAndKeys:@"Person 7", @"name", [NSNumber numberWithInt:2], @"rating", nil],
                             nil];
    NSArray *sortedArray = [totalRatings sortedArrayUsingDescriptors:[NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"rating" ascending:NO]]];