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我有一些代码，其中我得到了从现在到一年的日期数组

        NSCalendar* calendar = [NSCalendar currentCalendar];
        NSMutableArray *dateComponentsInRange = [NSMutableArray new];
        NSDate *curDate = [dates objectAtIndex:0];

        while ([curDate timeIntervalSince1970] <= [[dates lastObject] timeIntervalSince1970])
        {
            NSDateComponents *components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:curDate];
            [dateComponentsInRange addObject:components];
            curDate = [curDate dateWithNextDay];
        }

我需要dateComponentsInRange使用另一个按日、月和年进行比较的日期组件数组来过滤该数组（）。

到目前为止我试过这个

        NSDateComponents *components = nil;
        NSMutableArray *predicates = [NSMutableArray array];;
        for (NSDate *currentdate in dates)
        {
            components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:currentdate];
            NSString *preficateFormat = [NSString stringWithFormat:@"(SELF.day  != %d AND SELF.month != %d AND SELF.year != %d)",[components day],[components month], [components year]];
            [predicates addObject:preficateFormat];
        }
        NSPredicate *predicate = [NSCompoundPredicate orPredicateWithSubpredicates:predicates];
        NSArray *filteredArr = [dateComponentsInRange filteredArrayUsingPredicate:predicate];

但我收到以下错误

 [__NSCFString evaluateWithObject:substitutionVariables:]: unrecognized selector sent to instance
4

2 回答 2

3

您正在将字符串添加到数组并将其用作谓词。

尝试：

    NSDateComponents *components = nil;
    NSMutableArray *predicates = [NSMutableArray array];;
    for (NSDate *currentdate in dates)
    {
        components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:currentdate];
        NSString *preficateFormat = [NSString stringWithFormat:@"(SELF.day  != %d AND SELF.month != %d AND SELF.year != %d)",[components day],[components month], [components year]];
        NSPredicate * predicate = [NSPredicate predicateWithFormat:preficateFormat];
        [predicates addObject:predicate];
    }
    NSPredicate *predicate = [NSCompoundPredicate orPredicateWithSubpredicates:predicates];
    NSArray *filteredArr = [dateComponentsInRange filteredArrayUsingPredicate:predicate];
于 2014-09-05T21:46:47.217 回答
1

根据 Apple DocsorPredicateWithSubpredicates需要一个数组，NSPredicate但您正在传递一个NSString对象数组。

错误说

[__NSCFString evaluateWithObject:substitutionVariables:]: unrecognized selector sent to instance

这是正确的，因为evaluateWithObject:substitutionVariables不是为NSString但为NSPredicate

来源：Apple 文档

于 2014-09-06T05:21:48.950 回答