Javascript Angularjs 下一天和前一天，年，月
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/25719572/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Angularjs next and previous day,year,month
提问by itsme
Using the Angular date $filteractually i can get the current day, year and month.
使用 Angular 日期$filter实际上我可以获得当前的day, year and month.
But, how can i get the next and previous day, year, month?
但是，我怎样才能得到下一个和上一个day, year, month？
This is the code i wrote but i dont know where to start with
这是我写的代码，但我不知道从哪里开始
$scope.month = $filter('date')(date, 'MMMM');//December-November like
$scope.day = $filter('date')(date, 'dd'); //01-31 like
$scope.year = $filter('date')(date,'yyyy');//2014 like
$scope.nextYear = Number($scope.year) + 1;
$scope.prevYear = Number($scope.year) - 1;
$scope.nextDay = ?
etc...
Do you have any idea?
你有什么主意吗？
回答by Wawy
You could do it like this, angular date $filter doesn't offer you any easier way of doing it, it just formats a date in a custom desired format.
您可以这样做，角度日期 $filter 不会为您提供任何更简单的方法，它只是以自定义所需的格式格式化日期。
Day:
日：
var myDate = new Date();
var previousDay = new Date(myDate);
previousDay.setDate(myDate.getDate()-1);
var nextDay = new Date(myDate);
nextDay.setDate(myDate.getDate()+1);
Month:
月：
var previousMonth = new Date(myDate);
previousMonth.setMonth(myDate.getMonth()-1);
var nextMonth = new Date(myDate);
nextMonth.setMonth(myDate.getMonth()+1);
Year:
年：
var previousYear = new Date(myDate);
previousYear.setYear(myDate.getFullYear()-1);
var nextYear = new Date(myDate);
nextYear.setYear(myDate.getFullYear()+1);
$scope.month = $filter('date')(myDate, 'MMMM');//December-November like
$scope.day = $filter('date')(myDate, 'dd'); //01-31 like
$scope.year = $filter('date')(myDate,'yyyy');//2014 like
$scope.nextDay = $filter('date')(nexyDay, 'dd');
$scope.prevDay = $filter('date')(previousDay, 'dd');
$scope.nextMonth = $filter('date')(nextMonth, 'MMMM')
$scope.prevMonth = $filter('date')(previousMonth, 'MMMM')
$scope.nextYear = $filter('date')(nextYear,'yyyy');
$scope.prevYear = $filter('date')(previousYear,'yyyy');
If you are going to do this a lot, I suggest you create a service to implement this logic.
如果你打算经常这样做，我建议你创建一个服务来实现这个逻辑。
