NSPredicate 用于给定范围内的多日事件

【问题标题】：NSPredicate for multiday events in a given rangeNSPredicate 用于给定范围内的多日事件
【发布时间】：2015-10-07 00:23:27
【问题描述】：

我被困在一个谓词中

我需要获取在给定月份期间发生的事件数组。 如果给定的日期是 7 月，即7 月 1-31 日.. 然后我需要 event1, event 2, event 3, event 5, event6

所以我有事件 startDate 和 endDate

Event 1 - June 10 - July 14
Event 2 - July 4
Event 3 - July 7
Event 4 - June 9
Event 5 - July 1-July 3
Event 6 - May 1 - Dec 10

我试过关注但它只会返回 event2, event3

[NSPredicate predicateWithFormat:[NSString stringWithFormat:@"%@ >= %%@ AND %@ < %%@", @"startTime", @"endTime"], startDate, endDate]

【问题讨论】：

标签： ios mysql objective-c nspredicate fetch

【解决方案1】：

试试这个

 NSDate *now = [NSDate date];
NSInteger month = 7; // given month 

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:now];
[components setDay:0];
[components setMonth:month];

NSDateComponents *components1 = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:now];
[components1 setDay:31];
[components1 setMonth:month];

NSDate *startDate = [calendar dateFromComponents:components];
NSDate *endDate = [calendar dateFromComponents:components1];

NSPredicate* pred = [NSPredicate predicateWithFormat:@"(date >= %@) AND (date =< %@)", startDate, endDate];
NSArray* filteredArray = [yourarray filteredArrayUsingPredicate:pred];  // your array

【讨论】：

您的意思是 [NSPredicate predicateWithFormat:@"(startTime >= %@) AND (endTime =