Question

以下是我的代码：

data.table

现在：当endDate = 2015-08-31 23:59:59 +0000时，我的月份为9！这导致错误的endDayValue。这里出了什么问题？

修改

以下是我计算endDate的方法：

NSDateComponents *componenetsForEnd = [[NSCalendar currentCalendar] components:NSWeekdayCalendarUnit | NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear fromDate:endDate];
NSInteger endDay = [componenetsForEnd day];
NSInteger endMonth = [componenetsFoeEnd month];
NSInteger endDayValue = componenetsForEnd.weekday;

这个方法以[NSDate date]为今天的日期，这就是它：

NSDate *endDate = [self endOfMonthForDate:todayDate];

还尝试执行这些操作以在systemTimeZone中使用dateFormatter创建NSDateComponents和NSDate：

- (NSDate *) dateByAddingMonths: (NSInteger) monthsToAdd andDate: (NSDate *)date
{
NSCalendar * calendar = [NSCalendar currentCalendar];
[calendar setTimeZone:[NSTimeZone systemTimeZone]];
NSDateComponents * months = [[NSDateComponents alloc] init];
[months setMonth: monthsToAdd];

return [calendar dateByAddingComponents: months toDate: date options: 0];
}

- (NSDate *) endOfMonthForDate: (NSDate *)date
{
NSCalendar * calendar = [NSCalendar currentCalendar];
[calendar setTimeZone:[NSTimeZone systemTimeZone]];

NSDate * plusOneMonthDate = [self dateByAddingMonths: 1 andDate:date];


NSDateComponents * plusOneMonthDateComponents = [calendar components: NSYearCalendarUnit | NSMonthCalendarUnit fromDate: plusOneMonthDate];

NSDate * endOfMonth1 = [[calendar dateFromComponents: plusOneMonthDateComponents] dateByAddingTimeInterval: -1]; // One second before the start of next month
NSTimeZone* sourceTimeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];
NSTimeZone* destinationTimeZone = [NSTimeZone systemTimeZone];

NSInteger sourceGMTOffset = [sourceTimeZone secondsFromGMTForDate:endOfMonth1];
NSInteger destinationGMTOffset = [destinationTimeZone secondsFromGMTForDate:endOfMonth1];
NSTimeInterval interval = destinationGMTOffset - sourceGMTOffset;
NSDate* endOfMonth = [[NSDate alloc] initWithTimeInterval:interval sinceDate:endOfMonth1];

return endOfMonth;
}

Answer 1

而不是使用当前日历

var customer = {
    FirstName: "",
    LastName: "MyLastName",
    Email: "",
}; 

for(var propertyName in customer) {
   var propertyValue = customer[propertyName];
   console.log('LIST PROPERTIES: ', propertyName, propertyValue);
   
   if(propertyName == "LastName" && propertyValue == "MyLastName") {
       // do something
       console.log('your ' + propertyName + ' is ' + propertyValue);
   }
}

你可以使用：

[NSCalendar currentCalendar]

Answer 2

问题在于我认为是这样的：在计算日，月或小时，分钟和秒时，您需要指定dateComponents的时区是UTC，即GMT。但是，我的endDateProper在系统时区。

所以，这样做对我有用：

NSDateComponents *componenetsForEnd = [greCalendar componentsInTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"] fromDate:endDateProper];

指定日期的月值出错？

2 个答案: