检查重复事件，而不会在IOS中的事件存储中获取所有事件 [英] Checking for duplicate events without getting all events in the Event Store in IOS
本文介绍了检查重复事件，而不会在IOS中的事件存储中获取所有事件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
NSDate * edate = [formatter dateFromString：startDateString];
NSDate * fdate = [formatter dateFromString：endDateString];
NSLog（@开始日期为％@，edate）;
NSLog（@结束日期为％@，fdate）;
event1.startDate = edate;
event1.endDate = fdate;
NSArray * caleandarsArray = [[NSArray alloc] init];
caleandarsArray = [eventStore日历];
NSPredicate * predicateForEvents = [eventStore predicateForEventsWithStartDate：edate endDate：fdate calendars：caleandarsArray]; // nil将搜索所有日历
NSArray * eventsOnDate = [eventStore eventsMatchingPredicate：predicateForEvents];
NSLog（@保留日期的事件为％@，eventsOnDate）;
BOOL eventExists = NO;
for（EKEvent * eventToCheck in eventsOnDate）
{
NSLog（@eventToCheck title is％@，eventToCheck.title）;
NSLog（@myTripsArray title is％@，[myTripsArray objectAtIndex：i]）;
if（[eventToCheck.title isEqualToString：[myTripsArray objectAtIndex：i]]）
{
eventExists = YES;
NSLog（@事件已存在）;
}
}
if（eventExists == NO）
{
[event1 setTimeZone：[NSTimeZone systemTimeZone]];
[event1 setCalendar：[eventStore defaultCalendarForNewEvents]];
NSError * err;
if（err）
{
NSLog（@Error occurredured）;
}
else
{
NSLog（@不发生错误）;
}
[eventStore saveEvent：event1 span：EKSpanThisEvent error：& err];
}
}
通过上面的代码，我得到只有生日活动没有任何其他存在的事件。如何从日历中获取所有活动。
请帮助我出错。
解决方案
我使用以下代码解决了
- （IBAction）calenderButtonAction：（id）sender
{
eventStore = [[EKEventStore alloc] init];
if（[eventStore respondToSelector：@selector（requestAccessToEntityType：completion :)]
{
//选择器可用，所以我们必须在iOS 6或更新的
[ eventStore requestAccessToEntityType：EKEntityTypeEvent completion：^（BOOL grant，NSError * error）{
dispatch_async（dispatch_get_main_queue（），^ {
if（error）
{
//显示错误消息这里
NSLog（@error）;
}
else if（！approved）
{
//显示访问被拒绝
NSLog（@not approved）;
}
else
{
//获取
NSLog（@授予） ;
[self addedDetailsToCalender];
// *****做这些重要的东西*****
}
}）;
}];
}
}
通过忽略重复事件将事件添加到日历
- （void）addingDetailsToCalender
{
EKEvent * event1 = [EKEvent eventWithEventStore：eventStore];
event1.location = @海得拉巴;
event1.title = @样本测试Satya;
event1.startDate = [NSDate date];
// event1.endDate = [NSDate dateWithTimeIntervalSinceNow：86400] ;;
NSCalendar * calendar = [NSCalendar currentCalendar];
NSDateComponents * comps = [NSDateComponents new];
comps.day = 7;
NSDate * sevenDays = [calendar dateByAddingComponents：comps toDate：[NSDate date] options：0];
NSLog（@七天日期为％@，七天）;
event1.endDate =七天;
NSPredicate * predicateForEvents = [eventStore predicateForEventsWithStartDate：[NSDate date] endDate：[NSDate dateWithTimeIntervalSinceNow：10 * 365 * 86400]日历：nil];
NSArray * eventsOnDate = [eventStore eventsMatchingPredicate：predicateForEvents];
NSLog（@保留日期的事件为％@，eventsOnDate）;
BOOL eventExists = NO;
for（EKEvent * eventToCheck in eventsOnDate）
{
NSDateFormatter * dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat：@yyyy-MM-dd];
NSString * startDateStr = [NSString stringWithFormat：@％@，
[dateFormatter stringFromDate：eventToCheck.startDate]];
NSString * event1startDate = [NSString stringWithFormat：@％@，[dateFormatter stringFromDate：event1.startDate]];
NSLog（@mystart date is％@，startDateStr）;
NSLog（@我的活动开始日期是％@，event1startDate）;
if（[eventToCheck.title isEqualToString：event1.title]&&&&&start;
NSLog（@事件已存在）;
}
}
if（eventExists == NO）
{
[event1 setTimeZone： [NSTimeZone systemTimeZone]];
[event1 setCalendar：[eventStore defaultCalendarForNewEvents]];
NSError * err;
if（err）
{
NSLog（@Error occurredured）;
}
else
{
NSLog（@不发生错误）;
}
[eventStore saveEvent：event1 span：EKSpanThisEvent error：& err];
}
}
I am adding array of events to IOS calendar.As it has to happing on clicking a button.By doing this all the events are getting added again and again.So to over come that I used NSPredicate to get all the events and doing validation like below
NSDate *edate=[formatter dateFromString:startDateString];
NSDate *fdate=[formatter dateFromString:endDateString];
NSLog(@"Start Date is %@",edate);
NSLog(@"End Date is %@",fdate);
event1.startDate =edate;
event1.endDate=fdate;
NSArray *caleandarsArray = [[NSArray alloc] init];
caleandarsArray = [eventStore calendars] ;
NSPredicate *predicateForEvents = [eventStore predicateForEventsWithStartDate:edate endDate:fdate calendars:caleandarsArray]; // nil will search through all calendars
NSArray *eventsOnDate = [eventStore eventsMatchingPredicate:predicateForEvents];
NSLog(@"Events on holday date is %@",eventsOnDate);
BOOL eventExists = NO;
for (EKEvent *eventToCheck in eventsOnDate)
{
NSLog(@" eventToCheck title is %@",eventToCheck.title);
NSLog(@" myTripsArray title is %@",[myTripsArray objectAtIndex:i]);
if ([eventToCheck.title isEqualToString:[myTripsArray objectAtIndex:i]])
{
eventExists = YES;
NSLog(@"Event already existed");
}
}
if (eventExists == NO)
{
[event1 setTimeZone:[NSTimeZone systemTimeZone]];
[event1 setCalendar:[eventStore defaultCalendarForNewEvents]];
NSError *err;
if(err)
{
NSLog(@"Error occured");
}
else
{
NSLog(@"Error not occured");
}
[eventStore saveEvent:event1 span:EKSpanThisEvent error:&err];
}
}
By the above code I am getting only birthday events not any other events which are existed. How to get all events from the calendar.
Please help me where I had gone wrong.
解决方案
I solved it by using the below code
-(IBAction)calenderButtonAction:(id)sender
{
eventStore = [[EKEventStore alloc] init];
if ([eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)])
{
// the selector is available, so we must be on iOS 6 or newer
[eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {
dispatch_async(dispatch_get_main_queue(), ^{
if (error)
{
// display error message here
NSLog(@"error");
}
else if (!granted)
{
// display access denied error message here
NSLog(@"not granted");
}
else
{
// access granted
NSLog(@" granted");
[self addingDetailsToCalender];
// ***** do the important stuff here *****
}
});
}];
}
}
Adding events to calendar by ignoring duplicates
-(void)addingDetailsToCalender
{
EKEvent *event1 = [EKEvent eventWithEventStore:eventStore];
event1.location=@"Hyderabad";
event1.title=@"Sample test Satya ";
event1.startDate =[NSDate date];
// event1.endDate=[NSDate dateWithTimeIntervalSinceNow:86400];;
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *comps = [NSDateComponents new];
comps.day = 7;
NSDate *sevenDays = [calendar dateByAddingComponents:comps toDate:[NSDate date] options:0];
NSLog(@"Seven days date is %@",sevenDays);
event1.endDate=sevenDays;
NSPredicate *predicateForEvents = [eventStore predicateForEventsWithStartDate:[NSDate date] endDate:[NSDate dateWithTimeIntervalSinceNow:10*365*86400] calendars:nil];
NSArray *eventsOnDate = [eventStore eventsMatchingPredicate:predicateForEvents];
NSLog(@"Events on holday date is %@",eventsOnDate);
BOOL eventExists = NO;
for (EKEvent *eventToCheck in eventsOnDate)
{
NSDateFormatter *dateFormatter=[[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:@"yyyy-MM-dd"];
NSString *startDateStr=[NSString stringWithFormat:@"%@",
[dateFormatter stringFromDate:eventToCheck.startDate]];
NSString *event1startDate= [NSString stringWithFormat:@"%@", [dateFormatter stringFromDate:event1.startDate]];
NSLog(@"mystart date is %@",startDateStr);
NSLog(@"my event start date is %@",event1startDate);
if ([eventToCheck.title isEqualToString:event1.title] && [startDateStr isEqualToString:event1startDate])
{
eventExists = YES;
NSLog(@"Event already existed");
}
}
if (eventExists == NO)
{
[event1 setTimeZone:[NSTimeZone systemTimeZone]];
[event1 setCalendar:[eventStore defaultCalendarForNewEvents]];
NSError *err;
if(err)
{
NSLog(@"Error occured");
}
else
{
NSLog(@"Error not occured");
}
[eventStore saveEvent:event1 span:EKSpanThisEvent error:&err];
}
}
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