我怎么能得到昨天的NSDate

Question

我怎么能在iOS上获得昨天的NSDate？

谢谢

Answer 1

这是一种方法:

NSDateComponents *components = [[[NSDateComponents alloc] init] autorelease];
[components setDay:-1];

NSDate *yesterday = [[NSCalendar currentCalendar] dateByAddingComponents:components toDate:[NSDate date] options:0];

请查看日期和时间编程指南.