iphone - 从 fetchedResultsController 中移除对象

Question

是否可以从 fetchedResultsController fetchedObjects 中删除一个对象？

例如我有以下代码:

 NSPredicate *predicate = [NSPredicate predicateWithFormat:@"pack.packName IN %@", allowedPackNames];
            for (int i = 0; i < [tempFetchResults.fetchedObjects count]; i++){
                Author *author = [tempFetchResults.fetchedObjects objectAtIndex:i];
                NSSet *filteredQuotes = [author.quotes filteredSetUsingPredicate:predicate];
                if ([filteredQuotes count] > 0){
                  author.quotes = filteredQuotes;
                } else {
                  //remove this author from the fetchedObjects array 
                }
            }

我该怎么做？

Answer 1

从数据存储中删除对象:

[self.managedObjectContext deleteObject:object]; 
[self.managedObjectContext save:nil]; 
[self.fetchedResultsController self.fetchedResultsController.fetchRequest]; 
[tableView reloadData]; 

要从获取的结果 Controller 数组中删除对象，您需要更改谓词。确保禁用缓存(或更改缓存名称)以使其正常工作。