如何检查NSDate与TAPKU日历中的日期 [英] How to check NSDate against a date in TAPKU calendar

问题描述

我使用核心数据来存储我的项目的对象。对象中有一个日期字段。我想检查iPhone的Tapku日历组件的单击日期。我的对象的日期格式为

2011-01-10，它是一个本地化日期。

解决方案

可以，这里是我的（NSArray *）calendarMonthView：（TKCalendarMonthView *）monthView marksFromDate：（NSDate *）startDate toDate：（NSDate *）lastDate（NSDate *）的方法：

• 使正常的核心数据获取获取对象数组


• 开始每天检查startDate to lastDate with the [NSArray indexesOfObjectsPassingTest：] method


• 对于所有通过测试add和object到marks数组，并添加一个测试日作为键的字典和获取的对象值

警告：请确保将NSDate对象强制转换为无时间和GMT：0的日期，

这是一些代码...

  self.marksArray = [NSMutableArray array]; 
 self.dataDictionary = [NSMutableDictionary dictionary]; 
 
 NSCalendar * cal = [NSCalendar currentCalendar]; 
 [cal setTimeZone：[NSTimeZone timeZoneForSecondsFromGMT：0]]; 
 
 NSDateComponents * comp = [cal components：（NSMonthCalendarUnit | NSMinuteCalendarUnit | NSYearCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit | NSHourCalendarUnit | NSSecondCalendarUnit）fromDate：start]; 
 
 NSDate * ds = [cal dateFromComponents：comp]; 
 
 //初始偏移组件，每次增加循环中的天数
 NSDateComponents * offsetComponents = [[NSDateComponents alloc] init]; 
 [offsetComponents setDay：1]; 
 
 
 while（YES）{
 //日期是否超过上一个日期？如果是，退出循环。 
 // NSOrderedDescending =左边的值大于右边
 if（[ds compare：end] == NSOrderedDescending）{
 break; 
} 
 
 NSIndexSet * indexes = [arrayWithObjectsFromCoreData indexesOfObjectsPassingTest：
 ^ BOOL（id el，NSUInteger i，BOOL * stop）{
 NSDate * upd = [（YOUR_ENTINY *）el updated]; 
 
 NSDate * day = [self midnightUTC：upd]; 
 if（[ds isSameDay：day]）{
 return TRUE; 
} 
 return FALSE; 
}]; 
 
 
 
 if（indexes.count> 0）{
 
 [self.marksArray addObject：[NSNumber numberWithBool：YES]]; 
 [self.dataDictionary setObject：[wods objectsAtIndexes：indices] forKey：ds]; 
 
 
} else {
 //在这个日期没有wods 
 [self.dataArray addObject：[NSNumber numberWithBool：NO]];使用偏移量组件增量一天（例如，在这种情况下为1天）
 ds = [cal dateByAddingComponents：offsetComponents toDate：ds options：0]; 
} 
 
 
 
 
 
} 
 [offsetComponents release]; 
  

midnightUTC方法可以在这里找到：
http://www.voidasterisk.org/post/4209842795/how-to- calculate-nsdate-of-midnight-in-ios

I am using core data to store objects for my project.There is a date field in the object .I want to check against the clicked date of the Tapku calendar component for iphone. The date on my object is in the format

2011-01-10 and it is a localized date .

How can i check the date against the date returned from the tapku calendar control.

解决方案

Yes you can, here is what I did to make it work:

on the method: (NSArray*)calendarMonthView:(TKCalendarMonthView *)monthView marksFromDate:(NSDate *)startDate toDate:(NSDate *)lastDate

• Make the normal core data fetch to get an array of objects
• Start checking every day from startDate to lastDate with the [NSArray indexesOfObjectsPassingTest:] method
• For all that passes the test add and object to the marks array and add a dictionary with the tested day as key and the fetched objects as values

WARNING: make sure you cast your NSDate objects to a no time and GMT:0 dates in order to make the day comparison to work (learned this the hard way...)

Here is some code...

self.marksArray = [NSMutableArray array];
self.dataDictionary = [NSMutableDictionary dictionary];

NSCalendar *cal = [NSCalendar currentCalendar];
[cal setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];

NSDateComponents *comp = [cal components:(NSMonthCalendarUnit | NSMinuteCalendarUnit | NSYearCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit | NSHourCalendarUnit | NSSecondCalendarUnit) fromDate:start];

NSDate *ds = [cal dateFromComponents:comp];

// Init offset components to increment days in the loop by one each time
NSDateComponents *offsetComponents = [[NSDateComponents alloc] init];
[offsetComponents setDay:1];


while (YES) {
    // Is the date beyond the last date? If so, exit the loop.
    // NSOrderedDescending = the left value is greater than the right
    if ([ds compare:end] == NSOrderedDescending) {
        break;
    }

    NSIndexSet *indexes = [arrayWithObjectsFromCoreData indexesOfObjectsPassingTest:
                           ^BOOL (id el, NSUInteger i, BOOL *stop) {
                               NSDate *upd = [(YOUR_ENTINY *)el updated];

                               NSDate *day=[self midnightUTC:upd]; 
                               if([ds isSameDay:day]){ 
                                   return TRUE;
                               }
                               return FALSE;
                           }];



    if (indexes.count>0) {

        [self.marksArray addObject:[NSNumber numberWithBool:YES]];
        [self.dataDictionary setObject:[wods objectsAtIndexes:indexes] forKey:ds];


    }else {
        //no wods in this date
        [self.dataArray addObject:[NSNumber numberWithBool:NO]];
    } 

    // Increment day using offset components (ie, 1 day in this instance)
    ds = [cal dateByAddingComponents:offsetComponents toDate:ds options:0];



}
[offsetComponents release];

The midnightUTC method can be found here: http://www.voidasterisk.org/post/4209842795/how-to-calculate-nsdate-of-midnight-in-ios

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