获取时间

- (void)viewDidLoad
{

[super viewDidLoad];

NSInteger year,month,day,hour,min,sec,week;
NSString *weekStr=nil;

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDate *now = [NSDate date];;
NSDateComponents *comps = [[NSDateComponents alloc] init];
NSInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit |
NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;

comps = [calendar components:unitFlags fromDate:now];
year = [comps year];
week = [comps weekday];
month = [comps month];
day = [comps day];
hour = [comps hour];
min = [comps minute];
sec = [comps second];

if(week==1)
{
weekStr=@"星期天";
}else if(week==2){
weekStr=@"星期一";

}else if(week==3){
weekStr=@"星期二";

}else if(week==4){
weekStr=@"星期三";

}else if(week==5){
weekStr=@"星期四";

}else if(week==6){
weekStr=@"星期五";

}else if(week==7){
weekStr=@"星期六";

}
else {
NSLog(@"error!");
}

NSLog(@"现在是:%d年%d月%d日 %d时%d分%d秒  %@",year,month,day,hour,min,sec,weekStr);

NSInteger Monday = day - week+1+1;
for (int i=1; i<=7; i++) {

NSLog(@"本周 星期%d :%d年%d月%d日 ",i,year,month,Monday);
Monday=Monday+1;
}

}