日历商店：如何区分事件日历和任务日历？-解网

问：

我正在开发一个具有提醒组件的应用程序。我正在使用日历商店获取日历列表，并希望用户选择要向其添加任务的日历。问题是，CalCalendar 似乎没有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 );
    }
}

这将输出：

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，后 4 个是任务列表。而且，iCal 绝对知道其中的区别，因为它只显示事件的事件日历和任务的任务日历。

但是似乎没有办法通过日历存储 API 以编程方式确定这一点，除非我遗漏了什么。

更新：我发现我不是唯一一个注意到这一点的人，因为我发现 rdar://10377730。我刚刚提交了自己的报告，rdar://10980542

macOS iCalendar 日历商店

- (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;
}

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日历商店：如何区分事件日历和任务日历？

Calendar Store: how to distinguish event calendar from task calendar?

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