iOS EKEvent Store 在循环中重新创建 iCloud 日历，不会保存本地。

Question

我遇到了一个奇怪的问题 EKEventStore、iCloud 和本地日历。如果启用了 iCloud，则会创建日历并将事件保存到您所期望的日历中。如果 iCloud 已关闭并且您尝试保存事件，则没有任何反应，但是设备会继续每 3-5 秒循环创建 iCloud 日历，直到重新打开 iCloud，然后所有这些日历作为副本涌入 iCloud。我使用的代码几乎与此处多次引用的确切代码以及 Apples Docs 中的代码完全相同。我完全不知道为什么它不起作用，而且通常关于 EKEventStore 的文档似乎很少。

//•••••••••••••••••••••••••••••••••••••••••••• •• #pragma mark – 保存事件 //••••••••••••••••••••••••••••••••••••••••••••••

-(void)saveEventWithDate:(NSDate *)startDate endDate:(NSDate *)endDate
{
    AppData *theData = [self theAppData];

    if([self checkIsDeviceVersionHigherThanRequiredVersion:@"6.0"]) {
        [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) { // iOS 6 Support

            if (granted){
                NSLog(@"Access Granted");
            } else {
                NSLog(@"Access Not Granted");
            }

        }];
    }

    EKEvent *event  = [EKEvent eventWithEventStore:eventStore];

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

    if ([eventStore calendarWithIdentifier:[defaults objectForKey:@"My Calendar"]] != nil) // Calendar Existed
    {
        event.calendar  = [eventStore calendarWithIdentifier:[defaults objectForKey:@"My Calendar"]];
        NSLog(@"Calendar Existed");

    } else { // Create Calendar

        EKSource *theSource = nil;

        for (EKSource* src in eventStore.sources) {
            if ([src.title isEqualToString:@"iCloud"]) {
                theSource = src;
                break;
            }
            if (src.sourceType == EKSourceTypeLocal && theSource==nil) {
                theSource = src;
                break;
            }
        }

        [self setupCalendarWithSource:theSource withEvent:event];
    }

    NSLog(@"Type of Event:%@",typeOfEvent);

    if ([typeOfEvent isEqualToString:@"Hello"]) {
        event.title     = [NSString stringWithFormat:@"%@ Hello",[theData.hello_info objectForKey:@"customer_name"]];
        event.location  = [NSString stringWithFormat:@"Phone #%@",[theData.hello_info objectForKey:@"customer_phone_number"]];
        event.notes     = [NSString stringWithFormat:@"Hello Issue: %@",[theData.hello_info objectForKey:@"hello_issue"]];
        NSLog(@"Hello");
    }

    event.startDate = startDate;
    event.endDate   = endDate;
    event.allDay    = NO;
    EKAlarm *alarm = [EKAlarm alarmWithRelativeOffset:-1800]; // Half Hour Before
    event.alarms = [NSArray arrayWithObject:alarm];

    [eventStore saveEvent:event span:EKSpanThisEvent error:nil];

    SAFE_PERFORM_WITH_ARG(_delegate, @selector(wasScheduled), nil);
}

-(void)setupCalendarWithSource:(EKSource *)theSource withEvent:(EKEvent *)event {

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

    EKCalendar *cal;
    cal = [EKCalendar calendarWithEventStore:eventStore];
    cal.title = @"My Appointments";
    cal.source = theSource;
    [eventStore saveCalendar:cal commit:YES error:nil];
    NSLog(@"cal id = %@", cal.calendarIdentifier);
    NSString *calendar_id = cal.calendarIdentifier;
    [defaults setObject:calendar_id forKey:@"My Calendar"];
    event.calendar  = cal;
}

Answer 1

我不确定你为什么会出现这种行为，但我认为由于禁用了 iCloud，系统无法对其进行查询，然后排队创建请求，一旦你唤醒 iCloud 就会解决（但我假设）。

无论如何，我想到的第一个解决方案就是以这种方式检查 iCloud 是否处于活动状态

EKSource *defaultSource = [eventStore defaultCalendarForNewEvents].source;

if (defaultSource.sourceType == EKSourceTypeCalDAV)
    NSLog(@"iCloud Enable");
else
    NSLog(@"iCloud Disable");

完成后，您可以将您的活动正确保存到默认来源，然后保持 2 个日历（本地日历和云端日历）彼此同步...

仍然会提示重新激活 iCloud 添加所有本地日历。

另请参阅此处的第二个答案Accessing programmatically created calendar on iOS device（这是我的想法；））

希望对你有所帮助。

编辑：也许没有必要创建第二个日历...尝试将日历的来源从 EKSourceTypeCalDAV 更改为 EKSourceTypeLocal ...不要忘记使用提交“YES”保存日历

EDIT2：好的，刚刚测试...

替换为：

} else { // Create Calendar

    EKSource *theSource = nil;

    for (EKSource* src in eventStore.sources) {
        if ([src.title isEqualToString:@"iCloud"]) {
            theSource = src;
            break;
        }
        if (src.sourceType == EKSourceTypeLocal && theSource==nil) {
            theSource = src;
            break;
        }
    }

    [self setupCalendarWithSource:theSource withEvent:event];
}

有了这个...

} else { // Create Calendar

    EKSource *theSource = [eventStore defaultCalendarForNewEvents].source;

    [self setupCalendarWithSource:theSource withEvent:event];
}

这样您将在正确的来源中创建日历（如果用户停用 iCloud 和 CalDAV，则为本地）

然后：

1) 当用户选择停用 iCloud 时，应将日历保留在 iphone 上（而不是删除），以便您在本地源中拥有云日历

2) 当用户选择激活 iCloud 时，会将他的本地日历与云合并，然后就可以了！

希望对你有帮助

Answer 2

如果您想要一种防弹方法来查找 iCloud 日历并在 iCloud 被禁用时恢复到本地日历，请使用以下代码。我已经包含了一些可能有帮助的 cmets：

for (EKSource *source in eventStore.sources) {  //Check for iCloud
    if (source.sourceType == EKSourceTypeCalDAV && [source.title isEqualToString:@"iCloud"]) {

        NSLog(@"Found iCloud Service.");  //Found iCloud

        if([source calendarsForEntityType:EKEntityTypeEvent].count>0){     //Check to see if Calendar is enabled on iCloud

            NSLog(@"iCloud Calendar is Enabled."); //Calendar is Enabled

            if([self saveEventCalendarWithSource:source]){
                return YES;
            }

        }else{

            NSLog(@"iCloud Calendar is Disabled."); //Calendar is Disabled

        }
    }
}


//If we are here it means that we did not find iCloud Source with iCloud Name. Now trying any CalDAV type to see if we can find it

for (EKSource *source in self.reminderStore.sources) {  //Check for iCloud
    if (source.sourceType == EKSourceTypeCalDAV) {

        [self logData:@"Trying to save calendar in EKSourceTypeCalDAV Service."];

        if([self saveEventCalendarWithSource:source]){
            return YES;
        }

    }
}

//If we are here it means that we did not find iCloud and that means iCloud is not turned on. Use Local service now.

for (EKSource *source in self.reminderStore.sources) {  //Look for Local Source
    if (source.sourceType == EKSourceTypeLocal){  //Found Local Source
        NSLog(@"Found Local Source.");

        if([self saveEventCalendarWithSource:source]){
            return YES;
        }

    }
}

这是保存日历的代码：

- (Boolean) saveEventCalendarWithSource:(EKSource *)source{

EKCalendar *Calendar = nil;

MyCalendar = [EKCalendar calendarForEntityType:EKEntityTypeEvent eventStore:eventStore];

MyCalendar.title = @"XXX";
MyCalendar.CGColor = [UIColor blueColor].CGColor;

MyCalendar.source = source;

NSError *err;
if([eventStore saveCalendar:MyCalendar commit:YES error:&err]){

    if(MyCalendar.calendarIdentifier == nil){

        NSLog(@"Could not save Calendar: %@",err);

        return FALSE;
    }

    NSLog(@"Calendar Created. Here's the identifier %@",[MyCalendar calendarIdentifier]);

    return TRUE;
}

NSLog(@"Could not create calendar! Reason:%@",err.description);

return FALSE;

}

Answer 3

您的帖子很有帮助，我正在努力解决完全相同的错误。谢谢 ！

我只是做了一些小的修改，因为使用 defaultCalendarForNewEvents 源的解决方案并非在所有情况下都有效：某些源不允许您在其中创建新日历。

我只是检查了 icloud 源中的日历数量。如果计数为零，则日历同步关闭，我采用本地来源：

EKSource* localSource = nil;
EKSource* iCloudSource = nil;
for (EKSource* source in _eventStore.sources){
    if (source.sourceType == EKSourceTypeLocal){
        localSource = source;
    }else if(source.sourceType == EKSourceTypeCalDAV && [source.title isEqualToString:@"iCloud"]){
        iCloudSource = source;
    }
}

if (iCloudSource && [iCloudSource.calendars count] != 0) {
    calendar.source = iCloudSource;
}else{
    calendar.source = localSource;
}