我正在开发一个使用“主细节”设计模式的 Core Data iPad 应用程序。我正在尝试在更新 ManagedObjectContext 后添加一行动画。目前，当我添加对象时，它只会出现在 TableView 中。我正在使用斯坦福核心数据 TableView 类。
这是我的添加对象委托(delegate)的保存方法:
- (void)addObjectSaveButtonTapped:(iPadAddObjectViewController *)controller {
[self dismissModalViewControllerAnimated:YES];
[self setupFetchedResultsController];
}
这是我的setupFetchedResultsController方法:
- (void)setupFetchedResultsController {
NSString *entityName = @"Object";
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:entityName];
request.sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"objectName" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)]];
self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:request managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:nil];
[self performFetch];
}
这是performFetch方法。
- (void)performFetch
{
_debug = YES;
if (self.fetchedResultsController) {
if (self.fetchedResultsController.fetchRequest.predicate) {
if (self.debug) NSLog(@"[%@ %@] fetching %@ with predicate: %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), self.fetchedResultsController.fetchRequest.entityName, self.fetchedResultsController.fetchRequest.predicate);
} else {
if (self.debug) NSLog(@"[%@ %@] fetching all %@ (i.e., no predicate)", NSStringFromClass([self class]), NSStringFromSelector(_cmd), self.fetchedResultsController.fetchRequest.entityName);
}
NSError *error;
[self.fetchedResultsController performFetch:&error];
if (error) NSLog(@"[%@ %@] %@ (%@)", NSStringFromClass([self class]), NSStringFromSelector(_cmd), [error localizedDescription], [error localizedFailureReason]);
} else {
if (self.debug) NSLog(@"[%@ %@] no NSFetchedResultsController (yet?)", NSStringFromClass([self class]), NSStringFromSelector(_cmd));
}
[self.tableView reloadData];
}
有什么方法可以为对象添加添加动画吗？
最佳答案
[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:yourIndexPath] withRowAnimation:UITableViewRowAnimationFade];
[self.tableView endUpdates];
UITableView也有类似的方法，insertSections:withRowAnimation:
关于ios - 使用 Core Data 将行添加动画到 UITableViewController，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12030558/