我怎样才能得到正确的日期?
我有一个 NSString 类型的时间。我想知道这一天,但我发现了一些奇怪的事情。
NSString *strTime = @"2010-05-14 16:00:01";
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *oldDate = [formatter dateFromString:strTime];
unsigned int flags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit;
NSCalendar* calendar = [NSCalendar currentCalendar];
NSDateComponents* components = [calendar components:flags fromDate:oldDate];
int day = [components day];
当 NSString *strTime = @"2010-05-14 16:00:01" 时,日期是 15,当 NSString *strTime = @"2010-05-14 16:00:00" 时,日期是 14。我想知道为什么吗?
I have a time of NSString type. i wonder get the day, but i find somethine strange.
NSString *strTime = @"2010-05-14 16:00:01";
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *oldDate = [formatter dateFromString:strTime];
unsigned int flags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit;
NSCalendar* calendar = [NSCalendar currentCalendar];
NSDateComponents* components = [calendar components:flags fromDate:oldDate];
int day = [components day];
When NSString *strTime = @"2010-05-14 16:00:01" the day is 15,and when NSString *strTime = @"2010-05-14 16:00:00" the day is 14.I want to know why?
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您(可能)位于加利福尼亚州,并且日期对象是 GMT。使用 NSCalendar 意味着日期将从您所在的区域设置转换为 GMT。
You are in California (probably) and the date object is GMT. Using the NSCalendar means that the date will be converted from your locale to GMT.