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所以我有一個tableView和一個細節視圖。我在我的tableView中有一個額外的行來「添加」一條記錄。當我點擊新按鈕時,我會向我的詳細視圖發送一個零對象,這與我用於編輯現有行的視圖相同。我用下面的代碼:從Detail視圖中添加一行到TableView
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
new = NO;
NSUInteger row = [indexPath row];
SavedCarDetailController *detailController = [[SavedCarDetailController alloc] initWithNibName:@"SavedCarDetailController" bundle:nil];
if(indexPath.row >= [listOfCars count]){
NSLog(@"New Car");
detailController.car = nil;
new = YES;
} else {
new = NO;
detailController.car = [listOfCars objectAtIndex:row];
}
detailController.managedObjectContext = self.managedObjectContext;
[self.navigationController pushViewController:detailController animated:YES];
[detailController release];
}
當我救我的核心數據的東西,我在我的detailController執行此
- (void)viewWillDisappear:(BOOL)animated {
NSError * e = nil;
if(self.New){
NSLog(@"New Car Saving");
NSManagedObject * obj = [NSEntityDescription insertNewObjectForEntityForName:@"Cars" inManagedObjectContext: managedObjectContext];
[obj setValue:Name.text forKey:@"name"];
[obj setValue:Year.text forKey:@"Year"];
[obj setValue:Notes.text forKey:@"Notes"];
} else {
NSLog(@"Updating exiting car");
car.Name = Name.text;
car.Year = Year.text;
car.Notes = Notes.text;
}
[managedObjectContext save:&e];
if(e){
NSLog(@"Error occurred, %@", e);
}
if(self.New){
} else {
// [self.parentViewController.tableView reloadData];
}
}
然後更新我的tableView與reloadData但只更新修改的費爾德
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
if(new){
NSInteger row = [listOfCars count];
NSLog(@" row %i", row);
NSArray *paths = [NSArray arrayWithObject:[NSIndexPath indexPathForRow:row inSection:0]];
//NSArray * foo = [NSArray arrayWithArray:<#(NSArray *)array#>
[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:paths withRowAnimation:UITableViewRowAnimationFade];
[self.tableView endUpdates];
new = NO;
}
//This only works with "changed data" not new rows.
[self.tableView reloadData];
}
這會將新行保存到我的數據庫中,但不會出現新行。 InsertRows實際上coreDumps在我身上。我很確定我需要使用insertRowsAtIndexPaths,但是我不知道它放在哪裏,所以一旦將對象添加到CoreData中,它就會被執行。有任何想法嗎?
我在想,但汽車對象是在詳細視圖中,我不會將它傳回給父母。你知道我可以如何將這輛車添加到從Detail視圖返回到其父視圖的listOfCars? – 2011-01-26 17:47:28