在iPhone中查找周数

Question

这一定很简单，但我无法弄明白。

我想在iPhone中找到周数作为整数。

这显示了如何获取String Code

-(NSString*) getWeekOfMonth {
  NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
 [dateFormatter setDateStyle:NSDateFormatterMediumStyle];
 [dateFormatter setTimeStyle:NSDateFormatterShortStyle];
 [dateFormatter setDateFormat:@"W"];

 NSString *weekNumber = [dateFormatter stringFromDate:[NSDate date]];    
 [dateFormatter release];    
 return weekNumber;
}

由于

Answer 1

使用integerValue：

NSInteger weekInt = [weekNumber integerValue];

Answer 2

int intWeekNumber = [weekNumber intValue];

Answer 3

或使用：

CFAbsoluteTime currentTime = CFAbsoluteTimeGetCurrent();
CFTimeZoneRef currentTimeZone = CFTimeZoneCopyDefault();    
SInt32 weekNumber = CFAbsoluteTimeGetWeekOfYear(currentTime, currentTimeZone);