Swift 2.0 转换问题 NSFetchedResultsController didChangeObject

Question

在 Swift 2.0 中转换后我无法解决问题:

"Objective-C method 'controller:didChangeObject:atIndexPath:forChangeType:newIndexPath:' provided by method 'controller(:didChangeObject:atIndexPath:forChangeType:newIndexPath:)' conflicts with optional requirement method 'controller(:didChangeObject:atIndexPath:forChangeType:newIndexPath:)' in protocol 'NSFetchedResultsControllerDelegate'"

请帮帮我。提前致谢

func controllerWillChangeContent(controller: NSFetchedResultsController) {
    tableView.beginUpdates()
}

func controller(controller: NSFetchedResultsController, didChangeObject anObject: NSManagedObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?) {

    // the issue is here

    switch type {

    case NSFetchedResultsChangeType.Insert:
        if let newIndex = newIndexPath {
            tableView.insertRowsAtIndexPaths([newIndex], withRowAnimation: UITableViewRowAnimation.Automatic)
        }

    case NSFetchedResultsChangeType.Delete:
        if let index = indexPath {
            tableView.deleteRowsAtIndexPaths([index], withRowAnimation: UITableViewRowAnimation.Automatic)
        }
    }
}

func controllerDidChangeContent(controller: NSFetchedResultsController) {
    tableView.endUpdates()
}

Answer 1

将 didChangeObject anObject: NSManagedObject 的调用更改为 didChangeObject anObject: AnyObject。新方法如下所示:

func controller(controller: NSFetchedResultsController, didChangeObject anObject: AnyObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?) {

}

NSFetchedResultsController delegate methods