错误的日期从NSDateComponents返回 [英] Wrong date comes back from NSDateComponents

问题描述

为什么这给了我错误的日期？

Why is this giving me the wrong date ?

 NSCalendar *myCalendar = [[NSCalendar alloc] initWithCalendarIdentifier: NSGregorianCalendar];
    NSDateComponents* components = [myCalendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:[NSDate date]];
    [components setYear:2013];
    [components setMonth:06];
    [components setDay:28];
    [components setHour:5];
    [components setMinute:00];
    NSDate *startDate1 = [myCalendar dateFromComponents:components];
    NSLog(@"start date is %@",startDate1);

开始日期是2013-06-28 03:00:00 +0000

start date is 2013-06-28 03:00:00 +0000

编辑

我想要做的是以下内容。我有一个开始和结束。

What I want to do is the following. I have a start and endate.

例如：

开始日期是2013-06-28 05:00

start date is 2013-06-28 05:00

结束日期是：2013-06-29 04:59

end date is : 2013-06-29 04:59

然后我想检查当前日期是否在开始和结束之间日期。我使用以下内容。

Then I want to check if the current date is between start and end date. I am using the following.

NSComparisonResult result1 = [now compare:startDate1];
    NSComparisonResult result2 = [now compare:endDate1];

if (result2 == NSOrderedSame && result1 == NSOrderedSame ) {
        NSLOG(@"OKE!");
 }

推荐答案

可能日期是正确的，但是你误解了日志：

Probably the date is correct, but you misunderstood the log:

记录日期总是在TZ +0000中完成。例如，如果您在中欧，您将拥有（预期？）日期2013-06-28 05:00:00 +0200，但日志将显示标准化日期2013-06-28 03:00:00 +0000。这是相同的日期和时间！它只是以不同的方式表达。

Logging a date is always done in TZ +0000. For example, if you are in central europe, you will have the (expected?) date 2013-06-28 05:00:00 +0200, but the log will display the normilzed date 2013-06-28 03:00:00 +0000. This is the same date and time! It is simply expressed in a different way.

+++

如果您的组件位于TZ +0000你也应该设置日历的时区。

If your components are in TZ +0000, too, you should set the time zone of the calendar.

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