我运行了这段代码:
NSInteger day = 1;
NSInteger month = 1;
NSInteger year =0;
NSCalendar *gregorian;
NSDateComponents *components;
NSDate *theDate;
NSDateFormatter *dateFormatter;
for (int i=2005; i<2015; i++) {
year= i;
gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
components = [[NSDateComponents alloc] init];
[components setDay:day];
[components setMonth:month];
[components setYear:year];
theDate = [gregorian dateFromComponents:components];
[gregorian release];
dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:@"DD MMMM YYYY"];
NSLog(@"year=%d",year);
NSLog (@"hmm: %@",[dateFormatter stringFromDate:theDate]);
NSLog(@"theDate=%@\n\n",theDate);
}
...并得到这个输出:
year=2005
hmm: 01 January 2004
theDate=2005-01-01 00:00:00 -0600
year=2006
hmm: 01 January 2006
theDate=2006-01-01 00:00:00 -0600
year=2007
hmm: 01 January 2007
theDate=2007-01-01 00:00:00 -0600
year=2008
hmm: 01 January 2008
theDate=2008-01-01 00:00:00 -0600
year=2009
hmm: 01 January 2008
theDate=2009-01-01 00:00:00 -0600
year=2010
hmm: 01 January 2009
theDate=2010-01-01 00:00:00 -0600
year=2011
hmm: 01 January 2010
theDate=2011-01-01 00:00:00 -0600
year=2012
hmm: 01 January 2012
theDate=2012-01-01 00:00:00 -0600
year=2013
hmm: 01 January 2013
theDate=2013-01-01 00:00:00 -0600
year=2014
hmm: 01 January 2014
theDate=2014-01-01 00:00:00 -0600
显然问题出在格式化程序而不是日期。但是,我看不出格式化程序有什么问题。.
编辑:
换档:
[dateFormatter setDateFormat:@"DD MMMM YYYY"];
... 至:
[dateFormatter setDateFormat:@"DD MMMM yyyy"];
... 解决了这个问题,虽然我不知道为什么。