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我最近发布了一个应用程序，并立即发现了一个烦人的错误。有一个按钮可以将事件添加到 iCal。按下时，系统会要求用户允许应用程序访问日历。如果用户单击确定，则会显示一条错误消息（代码中的 if(!saved)）。但是，如果用户随后重新启动应用程序，那么一切正常（即项目被添加到 iCal 而无需请求许可）。

该错误特别令人讨厌的是它不会出现在模拟器中，也不会出现在之前安装了该应用程序的任何设备中（包括在删除应用程序和重置隐私设置之后）。这使得复制变得困难。

- (IBAction)addToCal:(id)sender{

EKEventStore *eventStore = self.filmController.eventStore;
/* I have moved this code to a new method, called after access is requested. See the edit...    
EKEvent *event  = [EKEvent eventWithEventStore:eventStore];
event.title     = self.film.title;
event.startDate = self.show.date;
event.endDate   = [[NSDate alloc] initWithTimeInterval:(60*[self.film.length integerValue]) sinceDate:event.startDate];
event.location = @"Cinema";
[event setCalendar:[eventStore defaultCalendarForNewEvents]];
*/
if([eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)]){
    [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {
        if(granted) {
            BOOL saved = [self saveEventToEventStore:eventStore];

            NSString *msg;
            NSString *title;

            if(!saved) {
                title = @"Sorry: We can't access your calendar";
                msg = @"Please check your access settings for the app in Settings>>Privacy>>Calendars (and try turning permissions 'Off' then 'On'). If you still can't save events then please let us know.";
            }
            else {
                title = @"Added";
                msg = @"Item added to calendar";
            }
            UIAlertView *eventAlert = [[UIAlertView alloc] initWithTitle:title message:msg delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
            [eventAlert performSelectorOnMainThread:@selector(show) withObject:nil waitUntilDone:YES];

        }
        else {
            UIAlertView *errorAlert = [[UIAlertView alloc] initWithTitle:@"Sorry: We can't access your calendar" message:@"You must change the setting for the app in Settings>>Privacy>>Calendars." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
            [errorAlert performSelectorOnMainThread:@selector(show) withObject:nil waitUntilDone:YES];
        }
    }];
}
else {
    [self saveEventToEventStore:eventStore];
}
}

-(BOOL) saveEventToEventStore:(EKEventStore *)eventStore {

//Set event details
EKEvent *event  = [EKEvent eventWithEventStore:eventStore];
event.title     = self.film.title;
event.startDate = self.show.date;
event.endDate   = [[NSDate alloc] initWithTimeInterval:(60*[self.film.length integerValue]) sinceDate:event.startDate];
event.location = @"Cinema";
[event setCalendar:[eventStore defaultCalendarForNewEvents]];
//event details end

NSError *err;
return [eventStore saveEvent:event span:EKSpanThisEvent error:&err];
}

任何帮助将不胜感激....

缺口

编辑：我一直在考虑这个问题，但仍然不明显出了什么问题。我唯一的猜测是我在 requestAccess 之前设置了我的事件详细信息。这可能会引发一些错误（可能是在设置日历时），从而导致保存失败。重新启动应用程序会从已授予访问权限的状态启动它，从而避免错误。我仍然对这个猜测并不完全满意，因为我认为它只会在第一次按下“添加到 iCal”按钮时引起问题，而我的问题发生在后续按下时。

我在上面添加了新的（更完整的）代码，它将事件创建放在 requestAccess 之后。可悲的是，我已经用完了设备来测试它，但如果我找到了一个，我会更新它是否有效。

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1 回答 1

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所以终于设法测试了我上面的编辑并且它有效。所以我认为问题在于

[event setCalendar:[eventStore defaultCalendarForNewEvents]];

前

[eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {
于 2013-05-07T19:52:10.980 回答