objective-c - IOS:NSDate 问题

Question

我有这个代码:

NSDateComponents *components = [[[NSDateComponents alloc] init] autorelease];
[components setYear:2011];
[components setDay:1];
[components setMonth:4];
NSCalendar *gregorianCalendar = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease];
NSDate *firstDate = [gregorianCalendar dateFromComponents:components];
NSLog(@"date:%@", firstDate);

控制台的结果是:

date:2011-03-31

为什么？？？？如果我设置“setDay:1”，它将是“date:2011-04-01”，不是吗？

Answer 1

我认为这可能是与时区相关的问题。请务必在 NSDateComponents 上设置您的时区:

[ components setTimeZone:[ NSTimeZone systemTimeZone ] ] ;