EKEvent编辑无法正常工作

Question

我在iOS5上工作EKEvent.我能够添加,删除,列出事件,但现在问题是当我尝试编辑现有事件时,"完成"按钮会产生问题.它不会进入eventEditViewController:方法.可能是什么问题？任何帮助将不胜感激.取消和删除按钮正在运行.当我编辑事件并单击"完成"时,控制台会显示
Calendar: unable to save: (null).

这是我试过的代码..

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    EKEventEditViewController* eventViewController = [[EKEventEditViewController alloc] init];
    event = [self.events objectAtIndex:indexPath.row];

    eventViewController.event = event;
    eventViewController.editViewDelegate = self;
    [self presentModalViewController: eventViewController animated:YES];
    [eventViewController release];
}

-(void)eventEditViewController:(EKEventEditViewController *)controller
         didCompleteWithAction:(EKEventEditViewAction)action {
    EKEvent *thisEvent = controller.event;
    NSError *error;
    if ([controller.event.endDate isEqualToDate:controller.event.startDate]) {
        controller.event.endDate = [controller.event.startDate dateByAddingTimeInterval:1.0]; // add one second
    }
    switch (action) {
        case EKEventEditViewActionCancelled:
            // User tapped "cancel"
            NSLog(@"Canceled");
            break;
        case EKEventEditViewActionSaved:
            NSLog(@"Saved");
            [controller.eventStore saveEvent:controller.event span: EKSpanFutureEvents error:&error];
            break;
        case EKEventEditViewActionDeleted:
            // User tapped "delete"
            NSLog(@"Deleted");
            // delete the event from event list
            [self.events removeObject:thisEvent];
            // delete the event from event store
            [self.eventStore removeEvent:thisEvent span:EKSpanThisEvent error:nil];
            // reload the tableView
            [self.tableOutlet reloadData];
            break;
        default:
                NSLog(@"Default");
            break;
    }

    [self dismissModalViewControllerAnimated:YES];

}

Answer 1

根据文件,

eventStore

必须在显示视图之前设置此属性.

所以,

eventViewController.eventStore = <your event store>;
eventViewController.editViewDelegate = self;

[self presentModalViewController: eventViewController
                        animated: YES];