代码：

1     NSDate *now = [NSDate date]; 2     NSCalendar *calendar = [NSCalendar currentCalendar]; 3      4     //获取年、月、日、时、分、秒等组件 5     NSDateComponents *dateComponents = [calendar components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond fromDate:now]; 6     NSLog(@"[%d]", dateComponents.year);    //年 7     NSLog(@"[%d]", dateComponents.month);   //月 8     NSLog(@"[%d]", dateComponents.day);     //日 9     NSLog(@"[%d]", dateComponents.hour);    //时10     NSLog(@"[%d]", dateComponents.minute);  //分11     NSLog(@"[%d]", dateComponents.second);  //秒