4

我正在尝试将我从 Web 服务收到的 NSDate 拆分为两个不同的日期，以便为每天包含部分的事件填充 tableView。我认为执行后者的最简单的方法是创建一个 fetch 请求来寻找独特的日子。

所以我尝试创建一个 NSDate“日”，但将时间组件设置为 00:00。我想知道是否有更有效的方法来实现这一点：

if (eventoItemList.count > 0) {
        NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
        [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

        NSDateFormatter *dayFormatter = [[NSDateFormatter alloc] init];
        [dayFormatter setDateFormat:@"yyyy-MM-dd"];

        for (GDataXMLElement *eventoItem in eventoItemList) {
            BOEvent *event = [[BOEvent alloc] init];
            NSString *idEventStr = [[[eventoItem elementsForName:@"id"] objectAtIndex:0] stringValue];                       
            NSString *name = [[[eventoItem elementsForName:@"titulo"] objectAtIndex:0] stringValue];
            NSString *type = [[[eventoItem elementsForName:@"tipo"] objectAtIndex:0] stringValue];
            NSString *descr = [[[eventoItem elementsForName:@"descripcion"] objectAtIndex:0] stringValue];
            NSString *address = [[[eventoItem elementsForName:@"direccion"] objectAtIndex:0] stringValue];
            NSDate *date = [dateFormatter dateFromString:[[[eventoItem elementsForName:@"fecha"] objectAtIndex:0] stringValue]];
            NSString *action =  [[[eventoItem elementsForName:@"accion"] objectAtIndex:0] stringValue];

            [event setIdEvent:[idEventStr integerValue]];
            [event setName:name];
            [event setType:type];
            [event setDesc:descr];
            [event setAddress:address];
            [event setAction:action];
            [event setDate:date];
            [event setDayDate:[dayFormatter dateFromString:[dayFormatter stringFromDate:date]]];
            [events addObject:event];
        }
    }

谢谢您的帮助。

4

1 回答 1

3

将 NSDate 拆分为两个NSDate 的示例代码（仅限日期，仅限时间）

     NSDate *date = [NSDate date];
    NSCalendar *gregorian = [NSCalendar currentCalendar];

    unsigned unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit;
    NSDateComponents *comps = [gregorian components:unitFlags fromDate:date];    
    NSDate *dateOnly = [gregorian dateFromComponents:comps];

    unitFlags = NSHourCalendarUnit | NSMinuteCalendarUnit |  NSDayCalendarUnit;
    comps = [gregorian components:unitFlags fromDate:date];    
    NSDate *timeOnly = [gregorian dateFromComponents:comps];

    NSLog(@"%@ = \n\tDate: %@ \n\tTime: %@", date, dateOnly, timeOnly);

在两个NSString中输出 NSDate 的示例代码

    NSDate *date = [NSDate date];

    NSDateFormatter *f = [[NSDateFormatter alloc] init];
    [f setDateStyle:NSDateFormatterFullStyle];
    [f setTimeStyle:NSDateFormatterNoStyle];
    NSString *dateOnly = [f stringFromDate:date];

    [f setTimeStyle:NSDateFormatterFullStyle];
    [f setDateStyle:NSDateFormatterNoStyle];
    NSString *timeOnly = [f stringFromDate:date];

    NSLog(@"%@ = \n\tDate: %@ \n\tTime: %@", date, dateOnly, timeOnly);
于 2012-12-01T15:08:42.160 回答