[英]KAL Calendar, how to implement KalDataSource so as I can show events which are in iOS in-built Calendar app?
我已成功將Kal Calendar集成到我的應用中,這是顯示日歷的方法
-(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中添加了以下內容,
@protocol KalViewControllerDelegate <NSObject>
@required
- (void)didSelectDate:(KalDate *)date andLoaded:(BOOL)loaded;
@end
和
@property (nonatomic, assign) id <KalViewControllerDelegate> kvcDelegate;
並在我的viewController中實現了這個委托方法
- (void)didSelectDate:(KalDate *)date andLoaded:(BOOL)loaded
{
NSLog(@"Title : %@",[self.navigationController.visibleViewController title]);
[self.navigationController popViewControllerAnimated:YES];
}
現在,按照我的問題,我想實現KalDataSource,以便它顯示帶有事件標記的日期,並選擇它在Month's View下方的表格視圖中顯示事件詳細信息。
如果您是Kal Calendar的新用戶,請參考此鏈接https://github.com/klazuka/Kal
第二個問題,這是我如何從KalViewController.m調用委托方法
- (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];
}
發生的是,當我調用showDepartDatePicker將KalViewController推送到導航堆棧時,它將調用我的委托方法2次(應在日期選擇時調用),然后對於每個日期選擇再次調用該委托方法(1次)。
即使我也想限制此日歷不顯示過去的日期! 請幫助我。
定義一個實現KalDataSource
協議的類。 有關實現KalDataSource
協議的類,請參見下面的示例。
//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:)]; }
要呈現UITableViewCells,請像在UITableView
那樣在KalDataSource
類中實現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; }
如果您想知道何時選擇UITableViewCell
,請定義實現UITableViewDelegate
協議的類,並將_departDatePicker.delegate
設置_departDatePicker.delegate
等於該類。 然后,您可以在該類中實現常規的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]; }
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