“＆＃39; NSUnknownKeyException＆＃39;，原因：...此类不是密钥值编码兼容的密钥scoreArray”

Question

NSMutableArray * scoreArray = [[[[returnedArr objectAtIndex:0]valueForKey:@"Questionnaire_Answers__r"] valueForKey:@"records"] valueForKey:@"Score__c"];

     dispatch_async(dispatch_get_main_queue(), ^{
        answerArray = [[[NSSet setWithArray:answerArray] allObjects]  mutableCopy];
          NSArray *filteredArray = [NSArray arrayWithArray:answerArray];

          NSSortDescriptor *valueDescriptor = [[NSSortDescriptor alloc] initWithKey:@"scoreArray" ascending:NO]; // Describe the Key value using which you want to sort.
          NSArray * descriptors = [NSArray arrayWithObject:valueDescriptor]; // Add the value of the descriptor to array.
          answerArray = [[filteredArray sortedArrayUsingDescriptors:descriptors] mutableCopy]; // Now Sort the Array using descriptor.

        [self.tblview reloadData];
    });

我正在尝试使用此代码进行排序，但我正在崩溃。

Answer 1

NSSortDescriptor *valueDescriptor = [[NSSortDescriptor alloc] initWithKey:@"scoreArray" ascending:NO]; 

initWithKey：表示模型的var，而不是数组的名称。