iOS：EKEventStore源/ defaultCalendarForNewEvents / calendarsForEntityType在授权后均不返回任何内容

Question

我有一个正在尝试帮助您逃脱的应用程序。这段代码最初是由另一个团队使用ios5编写的。我添加了成功运行的requestAccessToEntityType：completion：调用。但是，在被授予访问权限后，我没有基于实体的任何来源/ defaultCalendar或日历。而且我无法创建新的日历。

当调用defaultCalendarForNewEvents时出现此错误

Error Domain=EKCADErrorDomain Code=1013 "The operation couldn’t be completed. (EKCADErrorDomain error 1013.)"，结果为零。

如果我退出viewController尝试执行此操作然后再返回，则一切正常。如果在收到有关无源的警报后，我继续尝试（不退出viewController），则反复失败。

[我想强调一下，授权调用有效（要求用户访问日历并提供日历，然后再调用以确认授权通过）。我发现的所有其他类似问题均作为解决方案-确保您请求requestAccessToEntityType

[eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {
    if (granted)
        {
       //[self performSelectorOnMainThread:@selector(doScheduleActivity:) withObject:activity waitUntilDone:YES];
           dispatch_async(dispatch_get_main_queue(), ^{
                [self doScheduleActivity:activity];
                });
           }
       else
       { // probably should force the main thread
         dispatch_async(dispatch_get_main_queue(), ^{
            UIAlertView *av = [[UIAlertView alloc] initWithTitle:@"Calendar Access Required" message:@"In order to schedule activities, APP needs access to your Calendar.  You can change this in your device Settings." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
            [av show];
            });
         }

}] ;

granted返回true，并且[self doScheduleActivity：被调用。以下代码是在例程的开头以及失败所在的位置调用的函数。

EKCalendar *saCalendar;
EKSource *source;
NSError *error;
UIAlertView *alert;

LogDebug(@"eventStore defaultCalendar %@", [eventStore defaultCalendarForNewEvents]);

// validate access to calendar prior to segueing
if ([EKEventStore respondsToSelector:@selector(authorizationStatusForEntityType:)])
{
    switch([EKEventStore authorizationStatusForEntityType:EKEntityTypeEvent])
    {
        case EKAuthorizationStatusAuthorized:
            break;
        case EKAuthorizationStatusNotDetermined:
            {
                dispatch_async(dispatch_get_main_queue(), ^{
                    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:SA_ALERT_CAPTION_CALENDAR_ACCESS_NOT_DETERMINED message:SA_ALERT_BODY_CALENDAR_ACCESS_NOT_DETERMINED delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];
                    [alert show];
                    });
                return false;
                }
        case EKAuthorizationStatusDenied:
            {
                dispatch_async(dispatch_get_main_queue(), ^{
                    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:SA_ALERT_CAPTION_CALENDAR_ACCESS_DENIED message:SA_ALERT_BODY_CALENDAR_ACCESS_DENIED delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];
                    [alert show];
                    });
                return false;
                }
        case EKAuthorizationStatusRestricted:
            {
                dispatch_async(dispatch_get_main_queue(), ^{
                    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:SA_ALERT_CAPTION_CALENDAR_ACCESS_RESTRICTED message:SA_ALERT_BODY_CALENDAR_ACCESS_RESTRICTED delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];
                    [alert show];
                    });
                return false;
                }
        default:
            break;
    }
}

// search for application specifc calendar..
saCalendar = nil;
for(EKCalendar *calendar in [eventStore calendarsForEntityType:EKEntityTypeEvent])
{
    if([calendar.title isEqualToString:SA_ACTIVITIES_CALENDAR_TITLE])
    {
        saCalendar = calendar;
        break;
    }
}
// ..and create from scratch if nonexistent
if(nil == saCalendar)
{
    // find local source to hook up new calendar to
    for(source in [eventStore sources])
    {
        if(source.sourceType == EKSourceTypeLocal)
        {
            break;
        }
    }

    // if could not find local source type, something is wrong
    if( source == nil || source.sourceType != EKSourceTypeLocal)
    {
        alert = [[UIAlertView alloc] initWithTitle:SA_ALERT_CAPTION_CALENDAR_ERROR_NO_SOURCE message:SA_ALERT_BODY_CALENDAR_ERROR delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
        [alert show];
        return false;
    }

    // create calendar for applcation, name it, color it and assign source
    saCalendar = [EKCalendar calendarForEntityType:EKEntityTypeEvent eventStore:eventStore];
    [saCalendar setSource:source];
    [saCalendar setTitle:SA_ACTIVITIES_CALENDAR_TITLE];
    [saCalendar setCGColor:[[UIColor yellowColor] CGColor]];

    // create immediately
    error = nil; 
    if(![eventStore saveCalendar:saCalendar commit:true error:&error])
    {
        dispatch_async(dispatch_get_main_queue(), ^{
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:SA_ALERT_CAPTION_CALENDAR_ERROR_CANT_SAVE message:SA_ALERT_BODY_CALENDAR_ERROR delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
            [alert show];
            });
        return false;
    }
}

return true;

尽管所有内容都被授权，并且返回[EKEventStore authorizationStatusForEntity:EKEntityType中的检查返回EKAuthorizationStatusAuthorized，但一切都归零。

在这里出现故障后，如果我退出该视图控制器，然后再返回，则可以正常工作。仅当系统要求用户进行日历访问并且他们回答“确定”时，才会发生这种情况。

感谢您的见解。我一直在调试器中进行调试，并且还进行了printf类型调试，以避免出现任何计时问题等，并且没有发现与我在Apple网站上查看的事件相反的事情。

我的目标设备是6.1.3 iPhone 5

我有一个正在尝试帮助您逃脱的应用程序。这段代码最初是由另一个团队使用iOS5编写的。我添加了requestAccessToEntityType：completion：运行的调用...

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