KAL日历，如何实现KalDataSource，以便我可以显示iOS内置日历应用程序中的事件？

Question

我已成功将Kal Calendar集成到我的应用中，这是显示日历的方法

-(void)showDepartDatePicker{
    NSLog(@"showDepartDatePicker");
    if(_departDatePicker != nil){
        [self.navigationController pushViewController:_departDatePicker animated:YES];
    }else{
        _departDatePicker = [[KalViewController alloc] init];
        _departDatePicker.title = @"Departure Date";
        _departDatePicker.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Today" style:UIBarButtonItemStyleBordered target:self action:@selector(showAndSelectTodayDeparturePicker)];
        _departDatePicker.kvcDelegate = self;
        [self.navigationController pushViewController:_departDatePicker animated:YES];
    }

}

我在KalViewController.h中添加了以下内容，

@protocol KalViewControllerDelegate <NSObject>
@required
- (void)didSelectDate:(KalDate *)date andLoaded:(BOOL)loaded;

@end

和

@property (nonatomic, assign) id <KalViewControllerDelegate> kvcDelegate;

并在我的viewController中实现了这个委托方法

- (void)didSelectDate:(KalDate *)date andLoaded:(BOOL)loaded
{
    NSLog(@"Title : %@",[self.navigationController.visibleViewController title]);
    [self.navigationController popViewControllerAnimated:YES];
}

现在，按照我的问题，我想实现KalDataSource，以便它显示带有事件标记的日期，并选择它在Month's View下方的表格视图中显示事件详细信息。
如果您是Kal Calendar的新用户，请参考此链接https://github.com/klazuka/Kal

第二个问题，这是我如何从KalViewController.m调用委托方法

- (void)didSelectDate:(KalDate *)date
{
  self.selectedDate = [date NSDate];
  NSDate *from = [[date NSDate] cc_dateByMovingToBeginningOfDay];
  NSDate *to = [[date NSDate] cc_dateByMovingToEndOfDay];
  [self clearTable];
  [dataSource loadItemsFromDate:from toDate:to];
  [tableView reloadData];
  [tableView flashScrollIndicators];
  //line below calls my delegate method
  [self.kvcDelegate didSelectDate:date andLoaded:_loaded];
}

发生的是，当我调用showDepartDatePicker将KalViewController推送到导航堆栈时，它将调用我的委托方法2次（应在日期选择时调用），然后对于每个日期选择再次调用该委托方法（1次）。

即使我也想限制此日历不显示过去的日期！ 请帮助我。

Answer 1

1. 定义一个实现KalDataSource协议的类。 有关实现KalDataSource协议的类，请参见下面的示例。

    //header file #import Kal.h" @interface MyClass : NSObject <KalDataSource> @property (nonatomic, weak) id<KalDataSourceCallbacks> kalCallbackDelegate; @property (nonatomic, strong) NSArray *events; @end ---------------------- //implementation file - (void)presentingDatesFrom:(NSDate *)fromDate to:(NSDate *)toDate delegate:(id<KalDataSourceCallbacks>)callbackDelegate { //If you already have the events between fromDate and toDate then just call [callbackDelegate loadedDataSource:self]; //Else store the callback variable in a property and do an asyncrhonous //call to load the events. self.kalCallbackDelegate = callbackDelegate; //When the Asynchronous call is done, call [self.kalCallbackDelgate loadedDataSource:self]; } - (void)removeAllItems { self.eventsForDay = nil; } - (NSArray *)markedDatesFrom:(NSDate *)fromDate to:(NSDate *)toDate { //self.events may have multiple events with the same date. This pulls only the unique dates. //Also assumes that the object has an eventDate property for the beginning of the day NSMutableSet *uniqueDatesSet = [NSMutableSet setWithArray:[self.events valueForKeyPath:@"@distinctUnionOfObjects.eventDate"]]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self >= %@ && self <= %@", fromDate, toDate]; NSArray *uniqueDates = [[uniqueDatesSet allObjects] filteredArrayUsingPredicate:predicate]; return uniqueDates; } - (void)loadItemsFromDate:(NSDate *)fromDate toDate:(NSDate *)toDate { //filter for the events that occur between fromDate and toDate NSPredicate *predicate = [NSPredicate predicateWithFormat:@"eventDate >= %@ && eventDate <= %@", fromDate, toDate]; NSArray *filteredArray = [self.events filteredArrayUsingPredicate:predicate]; self.eventsForDay = [filteredArray sortedArrayUsingSelector:@selector(compareByEventTime:)]; } 

2. 要呈现UITableViewCells，请像在UITableView那样在KalDataSource类中实现tableView:cellForRowAtIndexPath: KalDataSource

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { Event *event = [self.events objectAtIndex:indexPath.row]; static NSString *identifier = @"MyCell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier]; if (!cell) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier]; cell.selectionStyle = UITableViewCellSelectionStyleNone; } cell.textLabel.text = event.title; return cell; } 

3. 如果您想知道何时选择UITableViewCell ，请定义实现UITableViewDelegate协议的类，并将_departDatePicker.delegate设置_departDatePicker.delegate等于该类。 然后，您可以在该类中实现常规的UITableViewDelegate方法。

    - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { Event *event = [self.events objectAtIndex:indexPath.row]; MyViewController *viewController = [[UIStoryboard storyboardWithName:@"iPhone" bundle:nil] instantiateViewControllerWithIdentifier:@"eventInfo"]; viewController.event = event; [self.navigationController pushViewController:viewController animated:YES]; }