Question

我正在开发一款带有提醒功能组件的应用。我正在使用Calendar Store来获取日历列表，我希望用户选择他们想要添加任务的日历。问题是，CalCalendar似乎无法区分事件日历和任务日历。

NSArray* calendars = [[CalCalendarStore defaultCalendarStore] calendars];
for( CalCalendar* aCalendar in calendars ) {
    if( aCalendar.isEditable ) {
        NSLog( @"editable calendar: %@", aCalendar );
    }
}

输出：

editable calendar: CalCalendar <0x6e04d10> {UID = 8AA8FFAD-D781-47F7-9231-CF66E1753983; title = Work; notes = (null); color = NSCalibratedRGBColorSpace 0.054902 0.380392 0.72549 1; type = CalDAV; editable = 1}
editable calendar: CalCalendar <0x6e05000> {UID = A7F4A1B2-D1CF-4A20-9F84-CD1A1E99773E; title = Home; notes = ; color = NSCalibratedRGBColorSpace 0.72549 0.054902 0.156863 1; type = CalDAV; editable = 1}
editable calendar: CalCalendar <0x6e050f0> {UID = 43B14D2A-9976-461C-8EFE-5FA029381828; title = Personal; notes = (null); color = NSCalibratedRGBColorSpace 0.901961 0.784314 0 1; type = CalDAV; editable = 1}
editable calendar: CalCalendar <0x6e05140> {UID = F42EC365-20AC-4251-B45E-FB7F169928F0; title = Mac; notes = (null); color = NSCalibratedRGBColorSpace 0.054902 0.380392 0.72549 1; type = Local; editable = 1}
editable calendar: CalCalendar <0x6e05190> {UID = FF771FF9-3969-4001-BBA4-9B7B00E80291; title = Cloud 2; notes = (null); color = NSCalibratedRGBColorSpace 0.054902 0.380392 0.72549 1; type = CalDAV; editable = 1}
editable calendar: CalCalendar <0x6e051e0> {UID = 40234537-869C-4CC2-89B9-DD4F7D36C169; title = Groceries; notes = ; color = NSCalibratedRGBColorSpace 0.443137 0.101961 0.462745 1; type = CalDAV; editable = 1}

我知道前2个是事件日历，最后4个是任务列表。并且，iCal肯定知道其中的差异，因为它只显示事件的事件日历和任务的任务日历。

但似乎无法通过Calendar Store API以编程方式确定，除非我遗漏了某些内容。

更新：我发现我不是唯一注意到这一点的人，因为我发现rdar://10377730。我刚刚提交了自己的报告，rdar://10980542

Answer 1

我对它并不十分满意，但我现在使用的解决方法是简单地尝试在每个日历中创建一个任务。如果您尝试在事件日历中创建任务，则会收到错误。它看起来有点像：

- (BOOL) isCalendarAUsableTaskList:(CalCalendar*)aCalendar
{
    if( !aCalendar.isEditable ) return NO;

    // Try to make a task here.
    CalTask* newTask = [CalTask task];
    newTask.calendar = aCalendar;
    newTask.title = @"Test Item";
    NSError* anError = nil;
    if( ![[CalCalendarStore defaultCalendarStore] saveTask:newTask error:&anError] ) {
        // Couldn't make a task, this calendar is no bueno.
        NSLog( @"Error saving task to calendar %@ (%@)", aCalendar.title, [anError localizedDescription] );
        return NO;
    }

    // Created a task.  Now clean up on our way out.
    NSLog( @"Saved task to calendar %@", aCalendar.title );
    [[CalCalendarStore defaultCalendarStore] removeTask:newTask error:nil];

    return YES;
}

日历存储：如何区分事件日历和任务日历？

1 个答案: