ios - 如何根据TimeWise对数组进行排序？

Question

我想根据时间的 AM 和 PM 值对数组进行排序...

我收到如下回复:

(
    {
        Rate = "4.44";
        Count = 3;
        Hours = "04:00 PM";
    },
    {

        Rate = "5.55";
        Count = 5;
        Hours = "07:00 AM";
    },
    {
        Rate = "3.33";
        Count = 2;
        Hours = "08:00 PM";
    }
)

我想根据上午和下午对时间进行排序以显示时间。

Answer 1

首先需要将 Hours 字符串转换为 NSDate 类的对象:

NSArray *sorted = [array sortedArrayUsingComparator:^NSComparisonResult(NSDictionary *a, NSDictionary *b) {
        NSDateFormatter *df = [[NSDateFormatter alloc] init];
        df.dateFormat = @"hh:mm a";
        df.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"];

        NSDate *dateA = [df dateFromString:[a objectForKey:@"Hours"]];
        NSDate *dateB = [df dateFromString:[b objectForKey:@"Hours"]];

        return [dateA compare:dateB];
    }];