weekOfYear无法正常工作

Question

我最近更新Xcode到版本6.0，当我这样做时，我被警告说NSDateComponentsweek方法已被弃用，并且新的weekOfYear方法取代它。我相信这些方法应该会返回一年中的第一周，介于1和52之间。但是，使用weekOfYear获得的值远远超过52.

我用来测试此代码的代码如下。有人可以为我验证这一点，如果我做错了什么，请告诉我那是什么？

- (void)testWeekOfYearMethod 
{ 
    NSLog(@"Inside testWeekOfYearMethod..."); 

    NSDate *date = [NSDate date]; 

    //NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; 
    NSCalendar *gregorian = [NSCalendar currentCalendar]; 

    NSDateComponents *weekdayComponents = [gregorian components:NSWeekCalendarUnit fromDate:date]; 

    NSInteger weekOrdinal = [weekdayComponents weekOfYear]; 

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
    [dateFormatter setDateFormat:@"yyyy-MM-dd 'at' HH:mm"]; 

    NSString *formattedString = [dateFormatter stringFromDate:date]; 
    NSLog(@"In getWeekContainingDate(), Date: %@ has week %ld", formattedString, [[NSNumber numberWithInteger:weekOrdinal] integerValue]); 
} 

Answer 1

weekOfYear只是一个访问NSDateComponents已创建的相应部分。你的例子没有指定选项NSWeekOfYearCalendarUnit，所以它没有任何访问！

它添加到你的选择，你应该得到你期待的结果：

NSDateComponents *weekdayComponents = [gregorian components:(NSWeekCalendarUnit | NSWeekOfYearCalendarUnit) fromDate:date];